Transcription MCQs with Answers

adminApril 6, 2024

0 24 2 minutes read

Welcome to the Transcription MCQs with Answers. In this post, we have shared Transcription Online Test for different competitive exams. Find practice Transcription Practice Questions with answers in Biology Tests exams here. Each question offers a chance to enhance your knowledge regarding Transcription.

Transcription is the process in which genetic information encoded in DNA becomes copied into mRNA. This can be viewed as a prime step of gene expression, because cells can now synthesize all proteins that are involved in a wide range of functions.

It begins with the attachment of RNA polymerase to a specific region of DNA called the promoter. This unwinds and separates DNA. RNA polymerase travels down one of the DNA template strands. There it forms one of the strands of RNA by adding complementary RNA nucleotides to the chain. For example, wherever there is an adenine (A) in the DNA template, RNA polymerase adds uracil (U) to the mRNA.

When the RNA strand is synthesized, a few other things happen in the process: adding a 5′ cap, a poly-A tail, and splicing to remove the introns or non-coding regions. Mature mRNA leaves the nucleus and enters the cytoplasm where it will be translated into a protein. Transcription controls gene expression and what the cell does.

Transcription Online Quiz

By presenting 3 options to choose from, Transcription Quiz which cover a wide range of topics and levels of difficulty, making them adaptable to various learning objectives and preferences. You will have to read all the given answers of Transcription Questions and Answers and click over the correct answer.

Test Name: Transcription MCQ Quiz Practice
Type: Quiz Test
Total Questions: 40
Total Marks: 40
Time: 40 minutes

Note: Answer of the questions will change randomly each time you start the test. Practice each quiz test at least 3 times if you want to secure High Marks. Once you are finished, click the View Results button. If any answer looks wrong to you in Quizzes. simply click on question and comment below that question. so that we can update the answer in the quiz section.

Transcription

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1 / 40

Which of the following is a function of the poly(tail in eukaryotic mRNA?

Enhancing mRNA stability

Termination of transcription

Initiating translation

2 / 40

Which of the following statements about transcriptional activators is true?

They bind to silencers to decrease transcription

They inhibit the function of RNA polymerase

They bind to enhancers to increase transcription

3 / 40

The process of transcription terminates when _____.

All nucleotides are transcribed

A stop codon is encountered

RNA polymerase reaches a terminator sequence

4 / 40

The template for transcription is _____.

Protein

RNA

DNA

5 / 40

The consensus sequence recognized by the sigma factor in prokaryotic promoters is _____.

TTGACA

TATAAT

ATGCTA

6 / 40

In eukaryotes, which RNA polymerase is responsible for transcribing most protein-coding genes?

RNA polymerase I

RNA polymerase III

RNA polymerase II

7 / 40

In eukaryotes, the enzyme responsible for removing introns from pre-mRNA is called ____.

Ribonuclease

Helicase

Spliceosome

8 / 40

Which of the following statements about transcription initiation in prokaryotes is true?

It involves the removal of introns from pre-mRNA

It requires a sigma factor to recognize the promoter sequence

It occurs in the cytoplasm

9 / 40

The process of removing introns and joining exons in eukaryotic mRNA is called ____.

Polyadenylation

Splicing

Capping

10 / 40

Which of the following is NOT involved in the termination of transcription in prokaryotes?

Rho factor

Polyadenylation signal

Hairpin loop

11 / 40

The process of transcription occurs in the _____.

Ribosome

Cytoplasm

Nucleus

12 / 40

Which of the following enzymes is NOT directly involved in transcription?

RNA polymerase

Helicase

DNA polymerase

13 / 40

The polyadenylation signal sequence in eukaryotic mRNA is recognized by ____.

Polyadenylation enzyme

Capping enzyme

Splicing enzyme

14 / 40

Which of the following is NOT involved in transcription elongation?

RNA polymerase

Ribonucleotides

Sigma factor

15 / 40

The process of transcriptional regulation involves _____.

Removing introns from pre-mRNA

Controlling the rate of mRNA synthesis

Modifying the structure of mRNA

16 / 40

Which of the following is NOT a type of RNA polymerase found in eukaryotes?

RNA polymerase III

RNA polymerase IV

RNA polymerase I

17 / 40

The enzyme responsible for transcription is called ____.

RNA polymerase

Helicase

DNA polymerase

18 / 40

RNA polymerase adds nucleotides to the growing RNA chain in the _____.

5' to 3' direction

Random direction

3' to 5' direction

19 / 40

The process of transcription is terminated by the formation of a ____.

Hairpin loop

Polyadenylation signal

Shine-Dalgarno sequence

20 / 40

Which DNA strand serves as the template for transcription?

Non-template strand

Sense strand

Antisense strand

21 / 40

The process of transcription occurs in the _____.

Mitochondria

Nucleus

Cytoplasm

22 / 40

The promoter region of a gene is located _____.

Within the gene coding region

Upstream of the transcription start site

Downstream of the transcription start site

23 / 40

The region of DNA where RNA polymerase binds to initiate transcription is called the ____.

Enhancer

Promoter

Silencer

24 / 40

Which of the following is a function of the sigma factor in transcription?

Recognizing the promoter sequence

Unwinding the DNA double helix

Adding nucleotides to the growing RNA chain

25 / 40

In prokaryotes, which region of the mRNA transcript serves as a binding site for the ribosome?

Shine-Dalgarno sequence

Polyadenylation signal

TATA box

26 / 40

Which of the following is a characteristic of the TATA box in eukaryotic promoters?

It is located downstream of the transcription start site

It is a sequence of DNA nucleotides

It is recognized by the sigma factor

27 / 40

In eukaryotes, which enzyme adds a 5' cap to mRNA transcripts?

Polyadenylation enzyme

Capping enzyme

Splicing enzyme

28 / 40

The process of transcription is regulated by _____.

DNA polymerase

Transcription factors

Ribosomes

29 / 40

Which of the following is NOT a type of RNA molecule?

DNA

mRNA

tRNA

30 / 40

Which of the following is NOT a component of the transcription initiation complex?

Repressor protein

Promoter

RNA polymerase

31 / 40

Which of the following statements about enhancers and silencers is true?

Enhancers and silencers are recognized by RNA polymerase

Enhancers and silencers are both found within the gene coding region

Enhancers increase transcription, while silencers decrease transcription

32 / 40

The process of transcription is initiated at the _____.

Terminator

Enhancer

Promoter

33 / 40

Transcription is the process of synthesizing ____.

DNA

Proteins

RNA

34 / 40

Which of the following is a post-transcriptional modification of mRNA in eukaryotes?

Enhancer binding

Polyadenylation

Promoter recognition

35 / 40

Which of the following statements about RNA processing is true?

It occurs after translation

It involves the addition of a 3' cap to mRNA

It includes capping, splicing, and polyadenylation

36 / 40

In eukaryotes, the process of mRNA capping involves adding a _____.

Poly(tail

Methylated guanosine cap

Ribosome-binding site

37 / 40

Which of the following is a component of RNA polymerase?

Sigma factor

Core enzyme

Helicase

38 / 40

Which of the following is NOT a component of the RNA polymerase holoenzyme in prokaryotes?

Sigma factor

Core enzyme

Helicase

39 / 40

Which of the following statements about the TATA box is true?

It is located downstream of the transcription start site

It is recognized by the sigma factor

It is a DNA sequence found in eukaryotic promoters

40 / 40

Which of the following is NOT a type of RNA processing in eukaryotes?

Splicing

Polyadenylation

Capping

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adminApril 6, 2024

0 24 2 minutes read