TRANSCRIPTION QUIZ

A specific __________ factor helps RNA polymerase bind to late promoters and transcribe late genes.

beta

sigma

gamma

delta

TRUE ANSWER : ?
YOUR ANSWER : ?

What is the usual sequence of a Pribnow box?

AUAUA

TTGACA

TATAAT

UUUUU

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following enzyme(s) is/are required for lactose fermentation?

All of these

Galactoside permease

Transacetylase

β-galactosidase

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following component of RNA polymerase facilitates the recognition of promoter sequences?

b subunit

c subunit

a subunit

s subunit

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is a product of transcription?

rRNA

mRNA

all of these

tRNA

TRUE ANSWER : ?
YOUR ANSWER : ?

An mRNA transcript of a gene contains

all of these

a start codon

a terminator

a stop codon

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of these catalyzes the synthesis of RNA from a DNA template?

RNA polymerase

DNA polymerase

DNA gyrase

DNA ligase

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following enzyme is used for synthesis of RNA under the direction of DNA?

RNA polymerase

RNA ligase

DNA ligase

DNA polymerase

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following statement defines a replicon?

A DNA molecule that encodes pili for conjugation

The enzyme responsible for transposition

A DNA template which is used in transcription

A DNA molecule that is able to replicate and be maintained

TRUE ANSWER : ?
YOUR ANSWER : ?

A level of regulation, demonstrated by the termination of transcription if tryptophan is abundant, by the tryptophan operon in E.coli cells is called

attenuation

corepression

desiccation

activation

TRUE ANSWER : ?
YOUR ANSWER : ?

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