Tay-sachs disease is a disorder characterized by an accumulation of fatty substances called gangliosides in the brain and spinal cord. one cause of the disease is a mutation in the gene sequence that codes for the enzyme hexosaminidase
a. the enzyme is rendered nonfunctional when a single amino acid—glutamine—is incorporated into the enzyme instead of an arginine. in this scenario, what is the cause of tay-sachs disease?

Answers

Answer 1
In this case, the cause of tay-sachs disease is a point mutation of the type missense.

it's called a point mutation when a single nucleotide base is changed, inserted or deleted from a DNA or RNA sequence . A subtype of this mutation is a missense mutation and that's when a amino acid is switched by another.
It's possible that a switch in the following codons caused the disease:
glutamine codons: CAA, CAG
Arginine's codons: CGU, CGC, CGA, CGG, AGA, and AGG





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Waste products which build up in the body can become deadly.

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that's true lol it's nasty

Answer:

true

Explanation:

Hypothesize about what would happen to the climate of there were no ocean

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Extremely hot. There would be no life without water, so ultimately it would just be a huge dessert 

The four polypeptides that are joined together to make hemoglobin represent which level of protein organization?

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Why dun chu post the questions all in one post? :0

Which bone or pair of bones forms the superior portion of the cranium?

Answers

The left and right Parietal bones. There are eight major bones that form the cranium. They are: Ethmoid: Forms the lower eye orbits and ceiling of the nasal cavity. Frontal: Forms the front of the cranium which includes the forehead, brow ridges, and nasal cavity. Occipital: Forms the lower rear of the cranium. Parietal (left and right): Form the superior and lateral portion of the cranium. Sphenoid: Forms some of the eye orbits and the floor of the cranium. Temporal (left and right): Forms the sides of the cranium and the external ear.

Final answer:

The parietal bones are the pair of bones that form the superior portion of the cranium, joined at the top of the skull and bordered by other cranial bones.

Explanation:

The superior portion of the cranium is formed by the parietal bones. These are paired bones that join together at the top of the skull, providing significant coverage and protection for the brain. The parietal bones are bordered anteriorly by the frontal bone, inferiorly by the temporal bones, and posteriorly by the occipital bone. Additionally, the entire cranium is composed of eight bones: one frontal bone, two parietal bones, two temporal bones, one occipital bone, one sphenoid bone, and one ethmoid bone, together creating the protective case around the brain.

When materials containing iron are exposed to water and oxygen, __________ can occur?

Answers

Rust is another name for iron oxide, which occurs when iron or an alloy that contains iron, like steel, is exposed to oxygen and moisture for a long period of time. Over time, the oxygen combines with the metal at an atomic level, forming a new compound called an oxide and weakening the bonds of the metal itself.

Answer: Oxidation

Explanation:Late? :p

what behavioral adaptations help snakes survive in hot dry places

Answers

snakes dry their skins out in the sun. so eventually they shed their skin. hope I helped! please feel free to ask us more questions here at brainly!

Which statement is true for both plant and animals cells?
A) They have cell nuclei and vacuoles.
B) Animal cells are generally smaller than plant cells.
C) They have centrioles and cellulose.
D) They have mitochondria and chloroplasts.

Answers

They have cell nuclei and vacuoles.

The right answer is B) Animal cells are generally smaller than plant cells.

The cell is the basic structural and functional unit of any living organism, that is to say that all living forms are composed of one or more cells. We speak of a unicellular or multicellular organism. The cells are either of the prokaryotic type or of the eukaryotic type.

The plant cell is larger than the animal cells, all the sites of biology without exception support this point of view. The animal cell has an average size of 50 microns (the largest of which, the oocyte is 120 micrometer) while the plant cell has an average size between 100 and 200 micrometers, so about four times more.

The vacuole is not systematically found in all animal cells (except for some specialized cells or macrophages where digestive vacuoles are found), moreover, it is not as characteristic as that of plant cells. it is much smaller or non-existent. Rare authors speak of vacuoles in animal cells but the term vesicle is more appropriate. Are different from vesicles because vacuoles:

1. Have a longer life

2. Are relatively stationary (static)

3. Are often very big

Species diversity, the number and relative abundance of species present in a community, is affected by competition, which results in

Answers

Competition results in extinction of species. The more adapted species will win, and the other will die out.

Species diversity is determined by species richness and species evenness, which are both impacted by competition among species within a community. Intense competition can decrease species diversity by reducing both the number and the relative abundance of species in an area.

Species diversity is affected by competition, a process where species interact and compete for the same resources within a community. When competition occurs, it can lead to a decrease in species diversity because some species will outcompete others, leading to reduced abundance or even the possible local extinction of the less competitive species. This interaction affects both the species richness, which is the total number of different species, and species evenness, which is the relative abundance of the different species in the community.

For instance, if we consider two communities with the same species richness (both having five different species), but in Community A one species, such as cheatgrass (Bromus tectorum), is far more abundant than the others, it results in low species evenness and thus a lower overall species diversity. In contrast, Community B, with a more balanced distribution of species, would exhibit greater species evenness and therefore higher species diversity.

Scientists study these community-level ecological interactions to understand the dynamics of species populations and the health of ecosystems. They note that biodiversity can vary greatly from one location to another, such as between the low-diversity glaciers of Antarctica and the high-diversity tropical rainforests.

X-ray imaging of the arterial blood vessels in the brain after injection of contrast material

Answers

X-ray imaging of the arterial blood vessels in the brain after injection of contrast material is Cerebral Angiography.
During this imaging, the contrast material is injected into femoral artery that is present in the thigh and then x-ray motion pictures are taken, these images are taken to detect the presence of vascular disease in the brain.

The ______ the temperature of an object the lower the ______ is thermal energy.

A Higher or lower
B Lower or lower
C Lower or higher

Answers

The correct option is B. The lower the temperature of an object the lower the lower is thermal energy.

The lower the temperature of an object, the lower is its thermal energy. Temperature directly influences the kinetic energy of molecules.

When temperature decreases, molecules have less kinetic energy, resulting in lower overall thermal energy stored within the object. Thus, lower temperatures correspond to lower thermal energy levels.

The other options are incorrect because:

A. Higher or lower is incorrect because higher temperatures increase thermal energy, contrary to the statement.C. Lower or higher is incorrect because lower temperatures correspond to lower thermal energy, not higher.

Explain why mitosis is referred to as a process of cell replication

Answers

Mitosis is a process of cell replication because in this process a parent cell will double its content (DNA,organelles, cytoplasm) and then separate them in to two identical cells. The replication is the ability of a cell making two exact replicas of its DNA.
Another example of cell replication is meiosis.

Final answer:

Mitosis is the process by which a single cell divides into two genetically identical daughter cells, essential for organism growth and repair. It involves carefully orchestrated stages that ensure precise distribution of replicated DNA followed by cell division. However, unregulated mitosis can lead to cancer.

Explanation:

Mitosis is referred to as a process of cell replication because it results in two genetically identical daughter cells from a single parent cell. This is essential for the growth, repair, and maintenance of an organism. During interphase, the DNA is replicated to prepare for mitosis. The mitotic stages, prophase, metaphase, anaphase, and telophase, involve meticulous separation and distribution of the replicated chromosomes. In cytokinesis, which follows mitosis, the cell is divided into two, each with an identical set of chromosomes.

Crucial components like spindle fibers ensure that each daughter cell receives an exact copy of the genetic material. This is vital not just for unicellular organisms that rely on mitosis for reproduction but also for multicellular organisms that need it for tissue repair and overall growth. Moreover, when mitosis occurs without proper regulation, it can lead to cancer, showing both the significance and the potential risks associated with this process.

How do some hormones affect only certain cells in the body but not others?

1.Only cells having specific receptors for a hormone can respond to the hormone's presence.

2.The hormones only go to some cells in the body but not to others.


3.Special molecules on cells that are not affected break down the hormone before the cell can recognize it.

4.Some cells have the wrong temperature to respond to the hormone.

Answers

The answer is number 1

Early land animals had to return to the water to reproduce.
True or False?

Answers

The answer would be true
The Statement "early land animals had to return to the water to reproduce" is true. Their land of living before was based on the use of water as their food source and also, where Females lay their eggs. They are called terrestrial animals.

Hope this helped:)
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The products of photosynthesis are the reactants of _____.
A. the Krebs cycle
B. cellular respiration
C. glycolysis
D. fermentation

Answers

The products of photosynthesis are the reactant of glycolysis; which is the breakdown of glucose.

The products of photosynthesis are the reactants of: (B) cellular respiration.

The products of photosynthesis, namely glucose and oxygen, are used as the reactants or substrates for cellular respiration. In cellular respiration, the glucose produced during photosynthesis is broken down in the presence of oxygen, releasing energy in the form of ATP (adenosine triphosphate).

Photosynthesis is a biological process occurring in plants, algae, and a few bacteria. Through this process, the organisms convert light energy from the sun into chemical energy in the form of glucose or other organic compounds. Photosynthesis is critical for life on Earth as it sustains plant growth and provides energy for all organisms that consume plants or plant-eating animals.

To know more about photosynthesis, here

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I NEED HELP WITH A QUICK BIOLOGY QUESTION!

Answers

yep the answer is c hope that helps

Garth is a heavy cigarette smoker. what types of sexual problems can he possibly experience due to smoking?

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Smoking can also hinder sexual performance, even when the smoker is initially in the mood. Smokers are more likely to have lowered sperm mobility and other issues which may make impregnating a partner more difficult. This may be in part due to the lack of blood flow smokers experience due to smoke inhalation and decreased lung function, although researchers are trying to determine all the ways tobacco use can affect sexual function.

A pregnant woman in her second trimester comes to the prenatal clinic for a routine visit. she reports that she has a new kitten. the nurse would have the woman evaluated for which infection

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Toxoplasmosis

You can receive Toxoplasmosis by hand to mouth after touching cat feces.

Individuals suffering from congenital analgesia have a shorter life span due to ________.

Answers

Individuals suffering from congenital analgesia have a shorter life span due to their injuries and secondary infections of injured sites.

Answer:

The correct answer would be repeated severe injuries because of pain insensitivity.

Explanation:

Congenital analgesia is a genetic disease that causes an individual to have no pain or pain insensitivity. This lack of pain leads to an accumulation of bruises, wounds, broken bones, and other health problems that may go undetected.

These injuries often lead to a short life expectancy in people with congenital analgesia to pain.

Thus, the correct answer would be repeated severe injuries because of pain insensitivity.

Organic catalysts are called polysaccharides. True False

Answers

False..................

Answer:

false

Explanation:

Electric charge can be transferred from one conducting body to another _________.

Answers

It can be transferred by both contacts and closeness

__________ is an unlearned, biologically determined behavior pattern common to all members of a species that predictably occurs whenever certain environmental conditions exist.

Answers

Answer:  An "instinct" .
________________________________________________

When a tumor is too large or too serious for a lumpectomy, a ________ is performed?

Answers

When a tumor that is present on an individual is too large or serious for lumpectomy, the procedure that is to be performed is mastectomy.  This procedure is a way of having to remove a tumor in a form of surgery to prevent the tumor from spreading or to prevent any serious consequences.

Final answer:

A mastectomy is performed when a tumor is too large or too serious for a lumpectomy. Surgery aims to treat isolated, solid cancers, and a biopsy is used for diagnosis before surgical procedures.

Explanation:

When a tumor is too large or too serious for a lumpectomy, a mastectomy is performed. Surgery is a common intervention for treating isolated, solid cancers where surgeons aim to remove the whole mass along with local lymph nodes if necessary. A biopsy may be conducted prior to surgery to analyze tissue specimens in a medical laboratory for cancer diagnosis. In situations where tumors cannot be removed without damaging vital structures, as it sometimes happens in the brain, other types of treatments are mandatory.

Many reservoirs are fed by underground water supplies flowing in _____.

Answers

aquifers yaaaaaaaay water from underground usually comes from aquifers

Many reservoirs are fed by underground water supplies flowing in aquifers.

An aquifer is an underground layer of water-bearing porous stone, earth or gravel. Groundwater in aquifers flows to the surface naturally and usually discharges into reservoirs, springs, seeps and they can also form wetlands. The permeability of the geologic layer of which an aquifer is formed determines the importance of an aquifer as a source of groundwater.

People’s choices can sometimes have negative effects on their own health, as well as the health or well-being of others. Describe two of these choices, explaining how they can impact the individual and others.

Answers

1. The bad choices, for example, consuming drugs because of other people pressure, can have negative effects on your individual health, including the health of your parents because of the fact that his son is a drug addict.
2- Eating a lot of bad food, that choice can be prejudicial for you, and for your family too. 

In dna methylation, which nitrogenous base is most frequently methylated?

Answers

In DNA methylation, the most frequently methylated nitrogenous base is the cytosine. Its methylation is widespread in prokaryotes and eukaryotes. Its rate of DNA methylation differs greatly between different species like Arabidopsis thaliana which is 8%, Physarum, 4%, Mus musculus, 2.3%, and etc.

A homozygous tall (dominant) pea plant is crossed with a short (recessive) plant. The probability that an F1 plant will be tall is

Answers

A heterozygous tall pea plant is crossed with a short plant. The probability that an F1 plant will be tall is- 50%
heterozygous tall pea plant is crossed with a short plant. The probability that an F1 plant will be tall is- 50% thats the answer


Confined aquifers are found _____.

Answers

Confined aquifers are found between two layers of impermeable soil

An aquifer is of 2 types -  unconfined and confined aquifers. It can be defined as a body of permeable rock which can contain groundwater.

Confined aquifers have an impermeable rock layer that prevents water from seeping into the aquifer from the ground surface. So, this aquifer is present between the rocks layer that are impermeable.    

The parents of a male adolescent with anorexia nervosa ask the nurse, "how long will our son's treatment take?" what is the most therapeutic response by the nurse?

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The nurse can respond with:"Treatment can undergo 6 to 12 months or longer, depending on the severity and how your son will react. You son will have to undergo through different sessions of therapy in order to understand his case and help reform it. He must take his time to heal psychologically and physically.

a cell is placed into a beaker if water as shown. diamonds represent salt molecules and blank space represents water. what will happen to the cell?

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The cell will expand as water goes through the membrane to try and balance the concentration on both sides of the cell.

Which organism is responsible for causing dermatitis related to a sexually transmitted infection?

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The Neisseria gonorrhoeae bacteria which responsible for Gonorrhea, a sexually transmitted disease. Aside from the usual symptoms of gonorrhea like vaginal and penile discharge it also includes skin dermatitis with pustular or papule like lesions which are located in visible areas.
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