The number of individual hair strands on 1 square inch of scalp is called:

Answer:

10% of total energy available in grass.

Explanation:

The energy transfer in an ecosystem occurs through the food chain and follows the 10% law and the second law of thermodynamics. Accordingly, during the transfer of energy from one trophic level to other, only 10% of energy is transferred and the rest 90% is lost as metabolic heat.  

Hence, the grass will use 90% of its total energy content in respiration and this energy will be lost as heat to the surroundings. Only 10% of the energy of grass will be available for deer.  

The complimentary strand of MRNA would be AAUUCCGG.

Answer:

the answer is AAUUCCGG

and don't worry I guessed and the answer right!

hope this helps

Explanation:

Final answer:

The optimal pH of the lactase enzyme is 6.5, which reflects its evolved functionality in the human small intestine. Protein structure is affected by pH, with ionic bonds forming optimally at this pH, allowing the enzyme to effectively hydrolyze lactose. Lactase persistence in some human populations is an evolutionary adaptation, enabling continued lactose digestion past weaning.

Explanation:

Optimal pH of Lactase and Protein Structure

The optimal pH for the human lactase enzyme is around 6.5. This pH level makes sense for the human enzyme because it has evolved to operate efficiently under the conditions found in the human small intestine, where lactase typically functions. The structure of proteins, including enzymes, is highly sensitive to changes in pH. At extremes of pH, the ionic bonds that maintain the protein's structure can be disrupted, leading to a change in the shape of the enzyme, also known as denaturation, and a loss of function.

The side chains of amino acids in the protein can gain or lose protons depending on the pH level, altering their charge. Ionic bonds between charged side chains can form or be disrupted by changes in pH. When the pH is optimal, these ionic bonds contribute to the stability of the enzyme's structure and enable it to bind to lactose efficiently, facilitating its proper function of hydrolyzing lactose into glucose and galactose.

Lactose intolerance occurs when an individual can no longer effectively produce lactase after weaning, leading to an inability to digest lactose and resulting in gastrointestinal discomfort when lactose-containing products are consumed. Interestingly, some populations have developed lactase persistence, likely as an adaptation to dairy farming, allowing them to continue digesting lactose into adulthood.

The porphyrin ring of chlorophyll contains magnesium and is essential for absorbing light and facilitating electron transfer in the process of photosynthesis.

The porphyrin ring of chlorophyll contains the element magnesium and the role of the ring is to absorb visible light and facilitate electron transfer during photosynthesis. Porphyrins are a group of organic compounds that are crucial to aerobic life, with a structure that supports a highly conjugated system allowing for light absorption.

In particular, the chlorophyll molecule, which gives plants their green color, is composed of a porphyrin ring and a long phytol tail. This molecule is at the heart of the photosynthetic process, capturing light energy and transferring it through a series of redox reactions to ultimately drive the synthesis of carbohydrates from carbon dioxide and water.

The mesoderm generates most of the cells in the developing mammalian forelimb, while the ectoderm is responsible for forming the neural tube.

The developing mammalian forelimb is primarily generated by the mesoderm, which is one of the three primary germ layers. The mesoderm is responsible for giving rise to the muscle cells and connective tissue in the body, including those present in the limbs. For the neural tube, its formation is credited to the ectoderm, another germ layer. The ectoderm specializes in forming the nervous system as well as the epidermis and other tissues.

Direction of embryonic development such as gastrulation and organogenesis are orchestrated by the three primary germ layers: the ectoderm, mesoderm, and endoderm. Each layer has a specific role in producing various tissues, organs, and systems necessary for building a complex organism.

In water, hydrogen bonding occurs between the hydrogen atom of one water molecule and an oxygen atom of a different water molecule.

In water, hydrogen bonding occurs between the hydrogen atom in one molecule and the oxygen atom in a different molecule. Specifically, a hydrogen bond in water is formed when a weakly positive hydrogen atom that is already bonded to an electronegative oxygen atom within one water molecule is attracted to the lone pair of electrons on an oxygen atom of a neighboring water molecule. This bond is characterized by the attraction between the partial positive charge on the hydrogen atom and the partial negative charge on the oxygen atom of another molecule. Hydrogen bonds are indicated with a dotted line in illustrations because they are relatively weak compared to covalent or ionic bonds. However, the cumulative effect of many hydrogen bonds imparts water with its unique and essential properties for life.

The activation energy of the mutant enzyme has increased by approximately 76.56 kJ/mol when compared to the wild-type (unmutated) enzyme.

A mutation in the enzyme that results in a significant decrease in the catalytic rate denotes corresponding alterations in the activation energy. Acknowledging that a decrease in catalytic rate signifies that the activation energy has increased, we can resort to the Arrhenius equation which connects the rate constant, activation energy, and temperature. The equation is expressed as k = Ae^-Ea/RT. Here, 'k' represents the rate constant, 'Ea' denotes the activation energy, 'R' is the ideal gas constant (8.314 J/mol/K), 'T' represents the temperature in Kelvin, and 'A' is the frequency factor.

Given that the decrease in the catalytic rate is 4 orders of magnitude, it is essentially saying that the rate has decreased by a factor of 10,000. Logarithmically, this equates to a difference of 9.21 in the natural log (ln) of the rate constant (since ln(10,000) = 9.21). We can utilize this information along with the previously mentioned Arrhenius equation to deduce the change in the activation energy.

Accommodating the transformed form of the Arrhenius equation, lnk = -Ea/RT + lnA, and assuming that factors other than the activation energy (like temperature and the frequency factor) remain unchanged between the wild-type enzyme and the mutated version, the change in the lnk gives us the change in the activation energy. Hence, the increase in activation energy (ΔEa) would be ΔEa = -R*Δ(lnk) = -8.314 J/mol/K * -9.21 = 76.56 kJ/mol.

Activation energy increased by approximately 69.32 kJ/mol in the mutant enzyme compared to the wild-type enzyme.

To solve this problem, we'll use the Eyring equation, which relates the rate enhancement [tex](k_cat/k_uncat)[/tex] to the change in free energy of activation (ΔG‡) through the equation:

[tex]\[ \text{Rate enhancement} = k_e = \frac{k_{\text{cat}}}{k_{\text{uncat}}} = \frac{k_{\text{B}}T}{h}e^{-\frac{\Delta \Delta G^{‡}}{RT}} \][/tex]

Given that the rate enhancement for the wild-type enzyme is [tex]\(1 \times 10^8\)[/tex], and the ΔΔG‡ (change in free energy of activation) is [tex]\(46 \, \text{kJ/mol}\)[/tex], we can rearrange the equation to solve for the new ΔΔG‡ when the rate enhancement is decreased by 4 orders of magnitude.

First, we find the new rate enhancement for the mutant enzyme:

[tex]\[ k_e = \frac{1 \times 10^8}{1 \times 10^4} = 1 \times 10^4 \][/tex]

Then, we rearrange the Eyring equation to solve for ΔΔG‡:

[tex]\[ \Delta \Delta G^{‡} = - \ln{\left( \frac{k_e h}{k_{\text{B}}T} \right)} \times RT \][/tex]

Substituting the given values and solving:

[tex]\[ \Delta \Delta G^{‡} = - \ln{\left( \frac{1 \times 10^4 \times 6.626 \times 10^{-34} \times 298}{1.38 \times 10^{-23} \times 298} \right)} \times 8.314 \times 298 \][/tex]

[tex]\[ \Delta \Delta G^{‡} = 69.32 \, \text{kJ/mol} \][/tex]

Thus, the activation energy has increased by approximately [tex]\(69.32 \, \text{kJ/mol}\)[/tex] in the mutant enzyme compared to the wild-type enzyme.

Further explanation

Microtubules or microtubules are tubes composed of microtubulins which are about 37 nm in diameter and have a length. more robust than actin, microtubules regulate the position of organelles in cells. Microtubules are divided into two, namely singlet microtubules and doublet microtubules. Microtubules have two ends, the negative end connected to the microtubule regulating center, and the positive end near the plasma membrane. Organelles can glide along microtubules to reach different positions in the cell, especially during cell division.

Microtubules are formed from globular proteins called tubulin, each tubulin molecule is a heterodimer consisting of two globular subunits that are tightly bound. Both have nearly the same size, one of each type joining non-covalently

to form a dimer. Dimers are the building blocks for erecting microtubules. One by one the dimers form a cylindrical wall in the shape of a helix. The microtubules lengthen by adding molecular ulcules at the edges.

In addition to being a tubulin homodimer association, microtubules also associate with other proteins, namely MAP protein (microtubule associated protein or protein associated with microtubules! during cell division (microtubular interphase).

MAP (a group of proteins that bind and stabilize microtubules). Similar to two classes of chemicals that change microtubules, MAPS can stabilize microtubules. Therefore, the expression of this variable protein among various types of dangerous human diseases and between individual patients with the same type of cancer has implications for results in chemotherapy using targeting microtubule agents.

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Class: College

Subject: Biology

Keywords : Microtubules,Dimer, Tubulin, Protein

The dodo birds became large allegedly due to the lack of natural predators on the island they inhabited, Mauritius. Without the need to compete for survival, these birds, like the Moa and the Galápagos tortoises, grew large in their respective favorable environments.

According to the context provided in the passage, the dodo bird, which inhabited the island of Mauritius in the Indian Ocean, became large likely due to the lack of natural predators. The mention of the bird being easy prey because it approached people without fear suggests that it evolved in an environment where it didn't have to avoid predators. Hence, the answer to your question is (choice d): dodo birds were so large because they had no natural predators on the island of Mauritius.

Just as the example of Darwin's observation on the population of giant tortoises in the Galápagos Archipelago, the dodo bird didn't need to compete for survival, allowing them to grow large. Similarly, other birds that evolved in a favorable environment with abundant food and less competition, such as Moa, also grew large showing that species size can be largely influenced by the absence of predators and the availability of ample resources.

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Diet and weight-loss products use heavy bias in their advertisements. They generally claim that they are the fastest or the only way for effective weight loss. They also often use before-and-after photos as evidence to show how people change by using their products. Most of the time, they show only the body of the person, so it’s questionable whether the before-and-after photos are even of the same person. If they show the results of a research study, we can check who funded the study. If the diet or weight-loss company founded the study, then we can check whether an unbiased group replicated the study before accepting it as a fact. If not, we can see how well the study was designed and whether the company controlled other factors such as the diet or exercise of the participants.