GENETIC REGULATION PROKARYOTES QUIZ

Tubulin is regulated by

binding of tubulin to the tubulin translational product

binding of tubulin to tubulin mRNA

binding of tubulin to DNA

splicing of the tubulin transcript

TRUE ANSWER : ?
YOUR ANSWER : ?

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

positive

negative

none of these

may be positive or negative

TRUE ANSWER : ?
YOUR ANSWER : ?

DNA is methylated at

TATA sequences

CG sequences

AC sequences

CAAT sequences

TRUE ANSWER : ?
YOUR ANSWER : ?

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

P

O

none of these

I

TRUE ANSWER : ?
YOUR ANSWER : ?

Sex lethal (sxl) in Drosophila is transcribed when

the X autosome balance equals 0.5

the X autosome balance is 1 or greater

None of these

the X autosome balance is less than 0.5

TRUE ANSWER : ?
YOUR ANSWER : ?

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

no operon expression

None of these

inducible trp operon expression

constitutive trp operon expression

TRUE ANSWER : ?
YOUR ANSWER : ?

Sex hormones activate transcription of specific genes by

binding to DNA promoter region

binding to a transcription factor

binding to DNA enhancer region

binding to RNA polymerase

TRUE ANSWER : ?
YOUR ANSWER : ?

The lac operon is transcribed in which segments?

3

2

1

4

TRUE ANSWER : ?
YOUR ANSWER : ?

Alternate splicing of RNA transcripts is a mechanism to regulate

tachykinins

DNA methylation

leucine zippers

tubulin

TRUE ANSWER : ?
YOUR ANSWER : ?

Methylated gene are

silent

active

dynamic

either (a) or (b)

TRUE ANSWER : ?
YOUR ANSWER : ?

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