General Science and Nature

A

It extends telomeres by adding repetitive sequences to the ends of chromosomes

B

It initiates DNA replication

C

It repairs DNA damage

D

It shortens telomeres during cell division

Explanation Comments

A

It unwinds the DNA double helix

B

It resolves DNA supercoils and catenanes

C

It synthesizes new DNA strands

D

It removes RNA primers

Explanation Comments

A

It promotes DNA replication

B

It regulates the accessibility of DNA to transcription factors

C

It catalyzes the formation of peptide bonds during translation

D

It stabilizes mRNA molecules

Explanation Comments

A

It repairs RNA damage

B

It synthesizes RNA from an RNA template

C

It synthesizes RNA from a DNA template

D

It synthesizes DNA from an RNA template

Explanation Comments

A

tRNA

B

snRNA

C

rRNA

D

mRNA

Explanation Comments

A

It synthesizes mRNA molecules

B

It synthesizes rRNA molecules

C

It synthesizes tRNA molecules

D

It synthesizes small nuclear RNA (snRNA) molecules

Explanation Comments

A

They remove methyl groups from DNA

B

They add methyl groups to cytosine bases in DNA

C

They add methyl groups to histone proteins

D

They remove methyl groups from RNA

Explanation Comments

A

It catalyzes the formation of peptide bonds during translation

B

It adds a poly-A tail to mRNA molecules

C

It adds a 5' cap to mRNA molecules

D

It removes introns from pre-mRNA molecules

Explanation Comments

A

It stabilizes the replication fork

B

It induces apoptosis

C

It promotes cell division

D

It repairs DNA damage

Explanation Comments

A

Transcription

B

Translation

C

mRNA degradation

D

RNA splicing

Explanation Comments

All MCQs

What is the role of the enzyme telomerase in eukaryotic cells?

Explanation:

What is the function of the enzyme topoisomerase II during DNA replication in eukaryotic cells?

Explanation:

What is the significance of histone modification in eukaryotic gene regulation?

Explanation:

What is the function of the enzyme RNA-dependent RNA polymerase in RNA viruses?

Explanation:

Which of the following types of RNA molecules carries amino acids to the ribosome during protein synthesis?

Explanation:

What is the function of the enzyme RNA polymerase II in eukaryotic cells?

Explanation:

What is the role of DNA methyltransferases in epigenetic gene regulation?

Explanation:

What is the function of the enzyme spliceosome in eukaryotic gene expression?

Explanation:

What is the function of the protein p53 in the cell cycle?

Explanation:

Which of the following processes involves the addition of a methylguanosine cap to the 5' end of mRNA molecules?

Explanation:

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