GENETIC REGULATION PROKARYOTES QUIZ

Which of the following is not a transcription factor?

Steroid hormones

Leucine zipper proteins

Helix-turn-helix proteins

Zinc finger proteins

TRUE ANSWER : ?
YOUR ANSWER : ?

DNA is methylated at

AC sequences

CAAT sequences

TATA sequences

CG sequences

TRUE ANSWER : ?
YOUR ANSWER : ?

Sex determination in Drosophila involves

methylation

alternate splicing

none of these

gene amplification

TRUE ANSWER : ?
YOUR ANSWER : ?

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

positive

may be positive or negative

negative

none of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Why are several structural genes regulated as a unit in bacteria?

An accident of evolution

It allows coordinating regulation of genes with a common function

None of these

The bacteria chromosome is so small; many different genes must be controlled by the same promoter

TRUE ANSWER : ?
YOUR ANSWER : ?

The lac operon is translated into __________ proteins.

4

2

3

1

TRUE ANSWER : ?
YOUR ANSWER : ?

The lac operon is transcribed in which segments?

4

2

1

3

TRUE ANSWER : ?
YOUR ANSWER : ?

A mutation in the tip binding site of the repressor would result in

None of these

no operon expression

inducible trp operon expression

constitutive trp operon expression

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 : ?

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

none of these

P

O

I

TRUE ANSWER : ?
YOUR ANSWER : ?