GENETIC REGULATION PROKARYOTES QUIZ

DNA is methylated at

AC sequences

CG sequences

CAAT sequences

TATA sequences

TRUE ANSWER : ?
YOUR ANSWER : ?

Genes which need to be coordinately regulated but are not in operons may be regulated by

TATA boxes

GC regions

common transcription factor binding domains

CAAT regions

TRUE ANSWER : ?
YOUR ANSWER : ?

A frameshift mutation occurs in the sigma subunit gene transcribed as part of SPOl early genes. What will be the immediate result?

The bacterial host will lyse immediately

Early genes will not be translated

Infection will proceed as usual

Middle genes will not be transcribed

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is not part of the lac operon?

O

P

I

none of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is not a transcription factor?

Zinc finger proteins

Steroid hormones

Helix-turn-helix proteins

Leucine zipper proteins

TRUE ANSWER : ?
YOUR ANSWER : ?

Tubulin is regulated by

splicing of the tubulin transcript

binding of tubulin to tubulin mRNA

binding of tubulin to DNA

binding of tubulin to the tubulin translational product

TRUE ANSWER : ?
YOUR ANSWER : ?

Sex determination in Drosophila involves

methylation

alternate splicing

none of these

gene amplification

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following occur in the presence of glucose?

lac Z gene expression is increased

cAMP increases

None of these

Binding of CAP-cAMP complex to the promoter area decreases

TRUE ANSWER : ?
YOUR ANSWER : ?

Catabolite activating protein exerts __________ control on transcription of the lac operon genes.

none of these

positive

negative

may be positive or negative

TRUE ANSWER : ?
YOUR ANSWER : ?

Methylated gene are

silent

active

either (a) or (b)

dynamic

TRUE ANSWER : ?
YOUR ANSWER : ?

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