GENETIC REGULATION PROKARYOTES QUIZ

The first protein complex to bind to the TATA box is

transcription factor IIB

all of these

transcription factor IID

transcription factor IIA

TRUE ANSWER : ?
YOUR ANSWER : ?

Tubulin is regulated by

binding of tubulin to tubulin mRNA

splicing of the tubulin transcript

binding of tubulin to DNA

binding of tubulin to the tubulin translational product

TRUE ANSWER : ?
YOUR ANSWER : ?

Sex determination in Drosophila involves

alternate splicing

methylation

gene amplification

none of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Methylated gene are

active

dynamic

either (a) or (b)

silent

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

Middle genes will not be transcribed

Infection will proceed as usual

TRUE ANSWER : ?
YOUR ANSWER : ?

The lac operon is transcribed in which segments?

4

3

2

1

TRUE ANSWER : ?
YOUR ANSWER : ?

In the presence of tryptophan in the cell, the repressor is __________

bound to neither tryptophan nor DNA

bound to both DNA and tryptophan

bound to tryptophan

bound to DNA

TRUE ANSWER : ?
YOUR ANSWER : ?

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

constitutive trp operon expression

None of these

no operon expression

inducible trp operon expression

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 : ?

In the presence of high levels of tryptophan

attenuator propogates transcription

attenuator terminates transcription

attenuator allows transcription of trp structural genes

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

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