GENETIC REGULATION PROKARYOTES QUIZ

The lac operon is translated into __________ proteins.

3

2

4

1

TRUE ANSWER : ?
YOUR ANSWER : ?

DNA is methylated at

CAAT sequences

TATA sequences

CG sequences

AC sequences

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

the X autosome balance is less than 0.5

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Alternate splicing of RNA transcripts is a mechanism to regulate

leucine zippers

tubulin

tachykinins

DNA methylation

TRUE ANSWER : ?
YOUR ANSWER : ?

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

negative

none of these

may be positive or negative

positive

TRUE ANSWER : ?
YOUR ANSWER : ?

The lac operon is transcribed in which segments?

2

1

4

3

TRUE ANSWER : ?
YOUR ANSWER : ?

Tubulin is regulated by

binding of tubulin to tubulin mRNA

binding of tubulin to the tubulin translational product

splicing of the tubulin transcript

binding of tubulin to DNA

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?

Early genes will not be translated

Infection will proceed as usual

The bacterial host will lyse immediately

Middle genes will not be transcribed

TRUE ANSWER : ?
YOUR ANSWER : ?

The first protein complex to bind to the TATA box is

transcription factor IID

transcription factor IIA

all of these

transcription factor IIB

TRUE ANSWER : ?
YOUR ANSWER : ?

In the presence of high levels of tryptophan

attenuator propogates transcription

attenuator allows transcription of trp structural genes

attenuator terminates transcription

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

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