With the aid of a simple generic diagram, identify and explain how the type(s) of chemical bonding stabilizes a secondary structure that is present in crystal structure of Yeast Hexokinase PII with the correct amino acid sequence

9. Which of the following statements about the building blocks of polymers is true? a. When looking at the complete structure of a nucleotide you can always tell whether it is considered a ribo-nucleotide or a deoxyribo-nucleotide. b. When looking at a glucose monomer (in linear form), you can always tell which polymer of glucose (a starch or cellulose) it will be incorporated into. c. When looking at a single amino acid, you can always tell whether it will be the last amino acid in a polypeptide chain. d. When looking at a nitrogenous base, you can always tell if it will be incorporated into a doublestranded nucleic acid or a single-stranded nucleic acid. e. There is more than one correct answer

DO YOU SEE WHAT EYE SEE CASE STUDY

1

One of Darwin’s main ideas was that evolution involves descent with modification from common ancestry. We know today that the modification can be simply divergence in gene sequences. The diagram to the right shows a phylogeny for the organisms represented in the sequences above. The degree of similarity in gene sequences is representative of how long ago two organisms have diverged from each other. In other words, organisms with a more recent common ancestor will have a greater similarity in gene sequences than organisms that have a much more ancient common ancestor. Make a hypothesis for which gene sequences listed above represent each branch of the phylogeny.

2

There is variation in nucleotide sequences, but the amino acid sequences for the partial sequence presented in this case are identical between the five species. Explain why natural selection might have favored conservation of the amino acid sequence.

3

How could different nucleotide sequences result in the same amino acid sequences? Explain the mechanism.

4

How is Pax6 and other master genes like HOX different from other genes? How does this difference affect evolution?

Thank you

QUESTION 33

You have added a drug that reduces the activity of the enzyme topoisomerase (gyrase). What will happen to the rate of activity of the helicase at the replication fork? Explain your reasoning.

Why do you think the enzyme(PPO) activity is dropping with time? Is benzoquinone a reactive species?

ppo=polyphenol oxidase

the question comes from enzymatic browning reaction.

Compare and contrast regulation of gene expression with use of an enzyme inhibitor. List one advantage and disadvantage for regulating gene expression and one advantage and one disadvantage for using inhibitor.

3. What product is formed when sulphanilamide binds to the enzyme dihydropteroate synthase rather than the natural substrate PABA? How does this result in the inhibition of bacterial growth?

Describe the reaction of gluconeogenesis and for each step explain the type of reaction, enzyme involved, substrate and product, if the reaction is reversible or irreversible, any coenzyme or prosthetic group involved, and location.