TRANSCRIPTION QUIZ

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

corepression

activation

desiccation

attenuation

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following statement defines a replicon?

A DNA molecule that encodes pili for conjugation

A DNA molecule that is able to replicate and be maintained

A DNA template which is used in transcription

The enzyme responsible for transposition

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YOUR ANSWER : ?

What is the usual sequence of a Pribnow box?

TTGACA

TATAAT

AUAUA

UUUUU

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Recognition/binding site of RNA polymerase is called

facilitator

receptor

terminator

promoter

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YOUR ANSWER : ?

Which of the following proteins first binds to TATA box during transcription?

TF II B

TF II A

RNA polymerase

TF II D

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YOUR ANSWER : ?

The sigma factor

recognizes the promotor

is responsible for recognizing the termination sequence

accomplishes DNA restriction

provides the catalytic function of cleaving off pyrophosphates during mRNA synthesis

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YOUR ANSWER : ?

Which of the following is a product of transcription?

tRNA

mRNA

all of these

rRNA

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

RNA ligase

RNA polymerase

DNA ligase

DNA polymerase

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The synthesis of mRNA based on a DNA template is called

translation

DNA replication

DNA restriction

transcription

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The location of first hexameric sequence typically found in pro-karyotic promoters is

at the transcription start site

approximately 35 bases upstream of the transcription start site

approximately 10 bases upstream of the transcription start site

approximately 25 bases upstream of the transcription start site

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