ENVIRONMENTAL ENGINEERING IN CE QUIZ

Which of the following is not a transcription factor?

Helix-turn-helix proteins

Steroid hormones

Leucine zipper proteins

Zinc finger proteins

TRUE ANSWER : ?
YOUR ANSWER : ?

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

O

none of these

P

I

TRUE ANSWER : ?
YOUR ANSWER : ?

Methylated gene are

active

silent

either (a) or (b)

dynamic

TRUE ANSWER : ?
YOUR ANSWER : ?

DNA is methylated at

TATA sequences

CG sequences

CAAT sequences

AC sequences

TRUE ANSWER : ?
YOUR ANSWER : ?

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

CAAT regions

TATA boxes

GC regions

common transcription factor binding domains

TRUE ANSWER : ?
YOUR ANSWER : ?

Sex lethal (sxl) in Drosophila is transcribed when

None of these

the X autosome balance is less than 0.5

the X autosome balance equals 0.5

the X autosome balance is 1 or greater

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following occur in the presence of glucose?

lac Z gene expression is increased

cAMP increases

Binding of CAP-cAMP complex to the promoter area decreases

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

The lac operon is transcribed in which segments?

1

2

3

4

TRUE ANSWER : ?
YOUR ANSWER : ?

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

none of these

may be positive or negative

negative

positive

TRUE ANSWER : ?
YOUR ANSWER : ?

Enhancers differ from promoters in that

they are adjacent to the start codon

they are restricted to a specific gene

they initiate transcription

their orientation can be inverted without effect

TRUE ANSWER : ?
YOUR ANSWER : ?

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