The correct answer is: Promoter
Promoter is a sequence on DNA molecule that initiates transcription of a particular gene (RNA polymerase binds to a promoter).
mRNA is a product of transcription from DNA and it has
5′ untranslated region- after the start codon, usually responsible for regulation of translation
Protein-coding region- composed of codons that caries the information for protein synthesis (translation).
Start (the first codon, usually AUG triplet) and stop codons (the last codon for the termination of translation)
3′ untranslated region-after the stop codon, usually responsible for mRNA stability and localization.
Which words or phrases identify common types of map projections? Check all that apply
conic ,equal-area,Mercator
A,D,E
Explanation: I just did the Quiz.
Answer:
a d e
Explanation:
Hey! Can someone please help me with these 2 questions? Thanks!
Hey your answers are:
1. C
2.D
Answer:
Explanation:
Option C is Corpus collasum
Next is cerebrum
The process of circular motion in the Earth's mantle that causes the plates of the lithosphere to move is called A) conduction. B) convection. C) deposition. D) drifting.
The process of circular motion in the Earth's mantle that causes the plates of the lithosphere to move is called convection.
The answer is B. convection
Hope this helps :)
Answer:
B) convection
Explanation:
Here's why: Convection currents are warm and rise above cooler air, which causes the circular movement in the mantle. This makes the plates of the lithosphere move.
Wind moves from an area of high pressure to an area of which type of pressure? A. low B. high C. equal D. cold
This is called the coriolis effect. So in the northern hemisphere, winds blow clockwise around an area of high pressure and counter-clockwise around low pressure.
UR ANSWER IS A.LOW
Answer;
A)LOW
Explanation:
Wind usually move from high-pressure areas to low-pressure areas. When the difference between the pressures is very huge, their will be faster movement of the air from the high to the low pressure side.
whenever there is High pressure in an area, it signifies that the atmospheric pressure of that particular are is high when compared to that of the surrounding areas. On the other hand when the pressure of a particular area is low, it signifies that the atmospheric pressure of that particular area is low or less when it is compared to that of the surrounding areas.
An instrument that is devices for the measurement of air pressure is called barometer.
The device contains mercury in the small basin, with an upside down glass tube located in the mercury. It operates in the sense that when the air pressure is increased, the pressure would force more mercury in the tube.
Which of the following is a correct statement about nephrons?
Materials such as urea and water are filtered out of the blood in the glomerulus, but glucose is reabsorbed out of the blood by the renal tubules.
Materials such as glucose and water are reabsorbed out of the blood in the glomerulus, but urea is filtered out of the blood by the renal tubules.
Materials such as urea, water, and glucose are reabsorbed out of the blood in the glomerulus, and water and glucose are then filtered back into the blood by the renal tubules.
Materials such as urea, water, and glucose are filtered out of the blood in the glomerulus, and water and glucose are then reabsorbed into the blood by the renal tubules.
Answer:
Materials such as urea, water, and glucose are filtered out of the blood in the glomerulus, and water and glucose are then reabsorbed into the blood by the renal tubules.
Explanation:
A pair of Kidneys is the principal excretory organ of the humans. Each kidney is composed of millions of its unit called nephrons. The nephron is the functional unit of the kidney as it filters out urea, water, and glucose from the bloodstream through the process of ultrafiltration. The filtered out material is called nephric filtrate. The filtrate then moves various tubules, called renal tubules where important molecules such as glucose, ions and water are reabsorbed into the blood.
Materials such as urea, water, and glucose are filtered out of the blood in the glomerulus, and water and glucose are then reabsorbed into the blood by the renal tubules.
Explanation:The correct statement about nephrons is: Materials such as urea, water, and glucose are filtered out of the blood in the glomerulus, and water and glucose are then reabsorbed into the blood by the renal tubules.
The glomerulus filters materials like urea, water, and glucose out of the blood, while the renal tubules reabsorb water and glucose back into the blood. This process helps maintain proper balance of substances in the body. An example of this process occurs in the kidneys, where glucose, water, salts, ions, and amino acids needed by the body are filtered and reabsorbed in different parts of the nephron.
Loss of muscle coordination results from the damage to what?
This is ataxia caused by a dysfunction of the cerebellum - a region of the brain involved in the assimilation of sensory perception, coordination, and motor control. Cerebellar ataxia can cause neurological problems such as: ... lack of coordination between organs, muscles, limbs, or joints.
The loss of muscle coordination is usually caused by damage to the cerebellum, a part of the brain responsible for coordination, precision and accurate timing of movements.
Explanation:The loss of muscle coordination primarily results from damage to the cerebellum. The cerebellum is a part of the brain that plays a vital role in motor control. It does not initiate movement, but it contributes significantly to coordination, precision, and the accurate timing of movements. Hence, any damage to the cerebellum can cause problems in balance, posture, and coordination of voluntary movements. Loss of muscle coordination, also known as ataxia, results from damage to the cerebellum in the brain. The cerebellum is responsible for coordinating voluntary movements and maintaining balance. Damage to this area can be caused by various factors, such as brain injury, stroke, or certain neurological disorders.
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How does an "activated" receptor transfer information into the cell?a. by increased translation of the receptorb. by altering the ligand-binding site of the receptorc. through a conformational change of the receptord. by decreased phosphorylation of the receptor
The correct answer is: c. through a conformational change of the receptor
When a ligand binds to receptor that is located on a cell surface, signal has to be transported into the cell. Usually, intracellular domain of the receptor changes its “shape” (conformation) which may make it active as an enzyme or available for other molecules binding. For example, the receptor may turn on signaling molecule inside of the cell and activates further chain reactions. Consequently, the cell responses by changing its behavior or characteristics.
Axon diameter and degree of myelination determine nerve impulse conduction velocity.
True
False
The answer is true.
The myelin sheath covers many axons in central nervous system (CNS) ( by oligodendrocytes) and in the peripheral nervous system (PNS) (by Schwann cells). Their function is to insulate axons and to increase the speed at which information travels from one nerve cell to another.
Nerve conduction velocity is specific to each individual and depend largely onboth an axon's diameter and the level to which that axon is myelinated.
PLZZ HELPS I'M TIMED!!
Which option distinguishes the governmental agency in charge of the aspect of farming described in the following scenario?
A rancher in Wyoming wishes to increase the number of cattle in his herd, but he owns too little pastureland. He would like to graze his new cattle on the adjacent federal rangeland.
A.) Bureau of Land Management
B.) Food and Drug Administration
C.) Environmental Protection Agency
D.) United States Department of Agriculture
I would say A becuase the rancher wants to use land that isn't his for his cattle.
Answer:
The correct answer is A. The governmental agency in charge of the aspect of farming described in the scenario is the Bureau of Land Management.
Explanation:
The Bureau of Land Management is an agency of the US Department of the Interior. The agency is responsible for managing around 1,020,000 km² of public lands, land owned by the state, as well as raw materials under a total of around 2,800,000 km² of public lands. Most of those tracts of land are in the western US, including Alaska. The agency's objectives include maintaining the health, diversity and productivity of the public lands for the use and benefit of Americans, also in the future.
Mitosis occurs in all cells except for which of the following:
A. Egg cell
B. Brain cell
C. Skin cell
D. Muscle cell
A, Egg cell, egg cell will do meiosis bcs egg cell is a sex cell
What is occuring during the capillary stagnation phase of hemorrhagic shock. arteriole constriction causes the pre-sphincter muscle to close?
During the capillary stagnation phase of hemorrhagic shock, blood flow is regulated by precapillary sphincters. If they are closed, due to influences like arteriole constriction, blood bypasses the capillary beds and flows directly from arteriole to venule.
Explanation:During the capillary stagnation phase of hemorrhagic shock, the body regulates blood flow based on its needs, directed by nerve and hormone signals. This is controlled by small muscles called precapillary sphincters. If the sphincters are open, blood will flow into the associated branches of the capillary blood. But, if all of the sphincters are closed, blood will flow directly from the arteriole to the venule, bypassing the capillary beds.
Arteriole constriction is triggered by certain regulators causing the release of vasoconstricting substances like endothelins from endothelial cells. This constriction could cause the pre-sphincter muscle to close, temporarily halting blood flow to that region. This is one of the responses the body may have during the stagnation phase of hemorrhagic shock.
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During the capillary stagnation phase of hemorrhagic shock, the body induces vasoconstriction to preserve core perfusion by constricting blood vessels, including the arterioles and precapillary sphincters, through the release of endothelins and prostaglandins. This response decreases blood flow to the capillaries and can lead to tissue ischemia and hypoxia.
During the capillary stagnation phase of hemorrhagic shock, there are significant changes in blood flow regulation within the microcirculation. The precapillary sphincters, which are circular smooth muscle cells, play a critical role in this process. Under normal conditions, these sphincters regulate the flow of blood into the capillaries based on the metabolic needs of the tissue. If the surrounding tissue requires oxygen and needs to eliminate waste products, the precapillary sphincters will open to allow blood flow. Conversely, they close to restrict the flow when necessary.
In hemorrhagic shock, the body responds by triggering vasoconstriction, the narrowing of blood vessels, to preserve core organ perfusion by diverting blood away from less vital regions. This response involves the release of endothelins, which are powerful vasoconstricting peptides, and other constricting factors like platelet secretions and prostaglandins. The constriction of arterioles and precapillary sphincters can minimize blood loss and maintain arterial pressure, but it also leads to reduced perfusion of the capillary beds, creating a stagnation phase where blood flow is significantly compromised, potentially leading to tissue ischemia and hypoxia.
Gene flow is the movement of alleles among populations of organisms. It tends to reduce ______________ among populations over time. A) fitness B) variation C) conservation D) survival
I'm pretty sure it is B, but don't take my word for it
Answer:
B
Explanation:
"suppose you hold a 10 pound weight steadily in your right hand with your elbow slightlly bent, so that you maintain a contraction of your biceps brachii muscle.after some time, you experience pain and it becomes increasingly difficult to keep the weight at the same level. explain why this is so."
After holding the weight for so long, the muscle would get tired, in an effort to tell the brain to stop holding the weight because the muscle fibers cannot handle it any more. Lactic acid is a by-product during muscle contraction that leads to the pain.
The first 22 chromosomes contain hundreds of genes in the same positions and sequence. If the code of the gene from one parent is exactly like the code on the same gene from the other parent, the gene pair is
The gene pair is identical.
_____ is an essential lung-coating substance that keeps air sacs from collapsing.
Why is it that bacterial ribosomes can begin translation before mRNA synthesis is completed, but eukaryotic ribosomes cannot? See Section 17.3 (Page 356) .
mRNA splicing occurs very quickly in prokaryotic cells.
Prokaryotic mRNAs are elongated differently from eukaryotic mRNAs.
In prokaryotes, transcription and translation take place in the cytoplasm.
Prokaryotic mRNAs are synthesized with ribosomes attached.
The correct answer is: In prokaryotes, transcription and translation take place in the cytoplasm.
Since there is no nucleus in prokaryotic cell (e.g. bacteria cell) transcription and translation are coupled processes that occur in the cytoplasm meaning that they occur simultaneously. Genetic material of the prokaryotes s called nucleoid and it is not located inside the membrane-bound organelle, thus it is in direct contact with ribosomes in the cytoplasm. Translation of messenger RNA by the ribosomes might occurred while mRNA is still being transcribed from DNA.
When using ___________, finalists are banded together into rank-ordered categories. select one:
a. ranking
b. random selection
c. clinical prediction
d. grouping?
D.grouping ?
im not sure.. but ihope it helps u dear :)
Which of the following statements is false? T-helper cells integrate the actions of the humoral and cellular immune responses. The humoral immune response is directed at antigens that have become established within cells. The humoral and cellular immune responses operate simultaneously. Cytotoxic T cells perform critical functions in the cellular immune response, and B cells produce antibodies in the humoral immune response. The humoral immune response produces antibodies, and the cellular immune response can destroy infected cells.
Answer:
the answer would be.... B :)
Explanation:
Please help me!!!
You are the first responder on a crime scene. You arrive and find yourself in an odd room— empty of everything except the body of an old man who has been decapitated; his head is nowhere to be found. You can clearly tell the no one else is around and the body looks like it has been here for days. What would be one of the first things you would document after arriving on the scene?
The age and overall appearance of the body
Whether the doors and windows in the room were open or closed
The estimated time of death of the victim
The presence of a murder weapon
Personally I would say the age and appearance of the body. It's of course the first thing you look at, and identifying the victim is one of the most important things to do when beginning an investigation.
Answer: Whether the doors and windows in the room were open or closed.
Explanation:
A first responder is a officer who reaches at the crime scene for the first time and conducts the investigation. Such officer notices the condition of the crime scene, makes notes, documents the crime scene by taking photographs and sketches.
According to the given situation, Whether the doors and windows in the room were open or closed. is the correct option.
This is because of the fact that this will help him identify whether it was a homicide. As if the old man could have killed himself the doors and windows will be closed. But if the doors and windows were found to be open this indicates that the criminal could have used the doors and windows to escape.
When carbon is in the atmosphere,it's usually in the from of molecules of , which is a
Answer:
atom characters till 20
Explanation:
Which of the following correctly identifies the connective tissue that connects muscles to bone, allowing a muscle to contract and pull on a bone in a way that makes the bone move?
thick filaments
ligament
tendon
periosteum
The answer to this question is tendon.
Tendon connect muscle to bone
Ligament connect one bone to another bone
Periosteum covers the outer surface of all bones /doesn't connect anything
Predict: Of the molecules shown on the CHEMICALS pane, which do you think are reactants (ingredients) in photosynthesis? Which do you think are products?
Reactants: ___________________________ Products: ___________________________
reactants in photosynthesis are carbon dioxide, water, and sunlight.
products are oxygen and sugar(glucose)
hope this helps. ( ' _ ' )
Reactants: Carbon dioxide (CO₂), water (H₂O), and light energy.
Products: Glucose (C₆H₁₂O₆) and oxygen (O₂).
In photosynthesis, plants convert carbon dioxide, water, and light energy into glucose and oxygen. The reactants, which are the ingredients needed for the photosynthesis process, are carbon dioxide, water, and light energy. Carbon dioxide is taken in from the atmosphere through small openings called stomata in the plant's leaves. Water is absorbed from the soil through the plant's roots. Light energy is absorbed by chlorophyll, a pigment found in the chloroplasts of plant cells. These reactants undergo a series of complex chemical reactions in the chloroplasts to produce glucose and oxygen.
Glucose is the primary product of photosynthesis, and it is a type of sugar that serves as an essential source of energy for the plant. It can be used immediately by the plant for energy or converted into starch for storage. Oxygen is the byproduct of photosynthesis, and it is released back into the atmosphere through the stomata. Oxygen is essential for most living organisms on Earth as it is used in cellular respiration, the process by which cells generate energy from glucose.
In summary, carbon dioxide, water, and light energy are the reactants that fuel the process of photosynthesis, while glucose and oxygen are the products that are formed as a result of this process.
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Mature human nerve cells and muscle cells are permanently in what state?
In mitosis cytokinesis occurs once in meiosis is occurs twice.
Mature human nerve cells (neurons) and muscle cells (muscle fibers) are permanently in a state called "G0" or the "resting phase."
In which state are these cells?The state is called the "resting phase" In this state, these cells have exited the cell cycle and are considered to be in a non-dividing or post-mitotic state. Unlike other cells in the body that can undergo cell division and replication, mature nerve cells and muscle cells generally do not undergo significant cell division or replace themselves through mitosis.
Once these cells have reached their mature and functional state, they typically remain in this state for the rest of an individual's life. This is because mature nerve cells and muscle cells have specialized structures and functions that are essential for their specific roles in the body. Their longevity and inability to divide or regenerate easily make them vulnerable to damage or degeneration, which can have long-lasting consequences.
However, it is important to note that certain conditions or injuries may stimulate limited regeneration or repair in nerve cells or muscle cells, albeit to a much lesser extent compared to other cell types. Nonetheless, in general, mature nerve cells and muscle cells are considered to be in a non-dividing state throughout a person's life.
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Which of the following is the time immediately following an orgasm during which an individual is incapable of experiencing another orgasm?
Answer:
Resolution
Explanation:
This phase proceeds organisms. The Sexual Response cycle phases are; excitement, Plateau, Orgasm, Resolution. Resolution is a recovery period after orgasm. In men, it is called the Refractory period and varies in lengths between men. The body returns to normal levels of functioning in this phase.
refractory period
Further explanationThe refractory period is also known as the interval parameter between erectile pauses. This is the nature of most men and is very reasonable. During this period of time, physical orgasm or further ejaculation is not possible. However, some men can learn to have an orgasm without ejaculating, thus making it possible to have multiple orgasms.
During this refractory period, men feel a deep and relaxed sensation, usually felt in the thighs and lower abdomen. Age affects recovery time, where young men recover faster than older men, although this is not universal.
The cause of relaxation and weakness is factored by the infusion of the hormone oxytocin when ejaculating. Once ejaculation ends, the hormone oxytocin levels increase to prevent erections and even make the penis hypersensitive. For a teenage boy, the refractory period will last from a few minutes to several hours.
Studies show that one of the factors that influence the refractory period is age. With increasing age, men need 12 to 24 hours to be sexually stimulated again.
Factors Affecting the Refractory Period
The refractory period is not something that appears suddenly. There are several factors that influence it.
Among the level of sensitivity in a person, the quality and emotional state during sexual intercourse, alcohol consumption habits, drugs and a sense of comfort in a partner.
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DetailsClass: High School
Subject: Biology
Keywords: Refractory Period , Sexually, Ejaculation.
All vascular plants have specialized tissues and _[blank]_.
produce spores
produce spores, seeds, and flowers
produce seeds
have a life cycle that alternates generations
The right answer is "have a life cycle that alternates generations"
The alternation of generations (metagenesis) is a characteristic of plants' life cycle. A generation is a stage of multicellular development stemming from a cellular stage (spore or gamete) and producing a cellular stage (gamete or spore). The generation producing gametes is the gametophyte, and the generation producing spores is the sporophyte. In general, a gametophyte alternates with a sporophyte. When mature, the sporophyte produces spores.
Thinking about the patients who seem to have the same illness, what did they have in common that would cause the "same illness"?
Symptoms, pre disposing factors, pre disposition, genetics, lifestyle
Drilling in wetlands issues Louisiana ?
Hi, I am a student from Louisiana who wrote a whole essay on this. I must say one of the biggest issues is the fact that it is slowly making us lose our land. The coastline is shrinking more and more everyday. Plus, drilling pollutes the water and since wetland water is freshwater, this is clearly not a good thing. Hope this helped!
The issue of drilling in Louisiana's wetlands involves environmental, legal, and economic aspects. The Clean Water Act of 1972 restricts drilling to protect wetlands, but recent court decisions are incrementally allowing more activities. Louisiana faces risks like habitat destruction and increased flooding, prompting ideas like storm surge barriers and sediment redistribution to mitigate the impacts.
Drilling in Wetlands Issues in Louisiana
The issue of drilling in wetlands in Louisiana encompasses environmental, legal, and economic facets. The Clean Water Act of 1972, specifically Section 404, is crucial in regulating activities like drilling in wetlands. This act initially curtailed the right to drain wetlands due to its negative impacts, such as carbon release, habitat destruction, increased flooding, and water quality deterioration downstream.
Over time, various court cases have redefined the jurisdiction of Section 404, incrementally allowing more drilling activities. However, since wetlands serve as natural filters and protectors against storms and flooding, Louisiana faces significant environmental risks, especially highlighted by the damage from Hurricane Katrina.
Moreover, ideas to mitigate these issues include building storm surge barriers and using well-planned levee breaks to redistribute sediment and rebuild the delta, though these solutions require substantial time and investment. Despite these efforts, challenges like nitrogen overload and eutrophication persist due to agricultural runoff, impacting the Gulf of Mexico's ecosystem.
Which of the following bones form part of the leg?
Select all that apply.
clavicle
ulna
femur
fibula
***see attached pic***
Correct answers:
femur (largest bone in the body, your entire upper leg)
fibula (one of the two major bones that make up your lower leg)
Incorrect answers:
clavicle (collar bone)
ulna (one of two major bones that make up your forearm)
Why do mitochondria and chloroplasts have small genomes?
The mitochondria and chloroplasts in eukaryotic cells are descendant from bacteria. Ancient eukaryotic cells ingested these bacteria and they became part of the larger cell structure. Mitochondria and chloroplasts work symbiotically with the cell to provide it with energy. Because these mitochondria and chloroplasts used to be separate bacteria living on their own, they had their own small circular DNA like all bacteria do. When they became part of the eukaryotic cell they retained this DNA. Mitochondria and chloroplasts also reproduce similar to bacteria and replicate their DNA the same way. In this way, all mitochondria and chloroplasts in the organism contain the same circular small genome, just like all nuclei in the organism contain the same spiral DNA.
Final answer:
Mitochondria and chloroplasts have small genomes due to their origin as endosymbiotic bacteria and the transfer of many genes to the host cell's nucleus.
Explanation:
Mitochondria and chloroplasts have small genomes due to their origin as endosymbiotic bacteria. These organelles were once free-living bacteria that were engulfed by a host cell and established a symbiotic relationship. Over time, many genes necessary for their function have been transferred to the host cell's nucleus, leading to a reduction in the size of their genomes. Mitochondrial genomes are typically around 16,000 base pairs in length and encode about 40 genes, while chloroplast genomes are larger at around 120,000-170,000 base pairs and encode around 100 genes. The reduced size minimizes the risk of harmful mutations, safeguarding the stability of these vital components. So, the small genomes of mitochondria and chloroplasts aren't a sign of weakness, but a result of their remarkable adaptation.
Which of the following statements is false? once an invasive species is well-established, it’s virtually impossible to eradicate it most U.S. states prohibit the importation of animal species likely to become invasive if they escape into the wild few new plant varieties are evaluated for their potential to become invasive prior to importation into the U.S. Internet sales and pet fairs make it difficult to control the trade in exotic species species listed as “endangered” are banned from international trade
The following statement is false: MOST US STATES PROHIBIT THE IMPORTATION OF ANIMAL SPECIES LIKELY TO BECOME INVASIVE IF THEY ESCAPE INTO THE WILD.
Presently, most US states do not have any law, which prohibit people from bringing into the US animal species that are likely to become invasive.
Invasive plant and animals are a great source of problems in America. These species usually destroy habitats and native species, this usually throw the ecological communities out of balance. The government spend as much as $120 billions every year to control these invasive species.