Question

1.Select all of the true statements regarding Okazaki fragments?

a) They are checked for accuracy by DNA polymerase III.

b) They begin with an RNA primer.

c) They make up the lagging strand of replicated DNA.

d) They are joined together by DNA ligase.

e) They are longer in eukaryotic cells.

2. Under what conditions does infection with Mycobacterium leprae develop into lepromatous leprosy?

a) when there is a weak or low cell-mediated immune response

b) when a strong antibody-mediated immune response develops

c) when the immune system develops a vigorous cell-mediated response

d) with pre-existing immunity as a result of immunization

e) when the innate respond is vigorous enough to clear the infection

3. In an inducible operon, which of the following must occur to inhibit gene expression?

a) The inducer must bind to the repressor.

b) The corepressor must bind to the repressor.

c) The inducer is absent.

d) The repressor must bind to the operator.

4.Streptococcus agalactiae commonly causes streptococcal toxic shock syndrome in otherwise healthy people.

a) True

b) False

5.Koch's postulates can be used to prove which of the following pairings of microbe and disease (select all that apply)?

a) HIV and AIDS

b) hepatitis B and D and liver cancer

c) Mycobacterium leprae and leprosy

d) Haemophilus influenzae and the flu

e) varicella-zoster virus and chickenpox

Answer 1

Question 1.

Answer-

) They begin with an RNA primer.

c) They make up the lagging strand of replicated DNA.

d) They are joined together by DNA ligase.

DNA polymerase III is main replicating enzyme. Okazaki fragment are short stretch of DNA produced on lagging strand.

They are joined to by DNA ligase.

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