Exercise 6: Dog Years It is commonly said that one human year is equivalent to 7 dog years. However this simple conversion fails to recognize that dogs reach adulthood in approximately two years. As a result, some people believe that it is better to count each of the first two human years as 10.5 dog years, and then count each additional human year as 4 dog years. Write a program that implements the conversion from human years to dog years described in the previous paragraph. Ensure that your program works correctly for conversions of less than two human years and for conversions of two or more human years. Your program should display an appropriate error message if the user enters a negative number.

code by python

Retroviruses such as HIV, the causative agent in AIDS, are RNA viruses, that is, their hereditary material is RNA not DNA. However, the retrovirus carry a gene for Reverse Transcriptase, and enzyme that converts viral RNA to DNA. Does reverse transcriptase violate the rules for the Central Dogma? i.e., DNA->RNA-> Protein?

A patient has a genetic mutation in the gene for glutaminase that significantly reduces the efficiency of this enzyme, leading to a decrease in glutamatergic signaling. Which of the following could potentially compensate for this?

What will happen in a phenol red test if you incubate an obligate aerobe with glucose as the fermentable sugar?

What is the substrate for the catalase enzyme? What do you detect if the catalase test is positive?

Why doesn't the iodine react with starch in the agar surrounding an organism that produces amylase?

The β (beta) subunit of E. coli DNA polymerase III possesses which of the following enzymatic activities?

1. 3’- 5’ polymerase

2. 3’- 5’ exonuclease

3. 5’ - 3’ exonuclease

4. 5’ - 3’ polymerase

5. the beta subunit is not an enzyme

you are purifying enzyme Z. You think that the preparation is not pure, based on the following data (choose all correct answers):

Group of answer choices

there are three bands on an SDS-PAGE gel

there is only one band on a native PAGE gel

there are two bands on an IEF gel

SUMMARY of DIGESTIVE ENZYNMES