General Science and Nature

A

It joins Okazaki fragments together

B

It synthesizes new DNA strands

C

It removes RNA primers

D

It unwinds the DNA double helix

Explanation Comments

A

Homologous recombination (HR)

B

Mismatch repair (MMR)

C

Nucleotide excision repair (NER)

D

Base excision repair (BER)

Explanation Comments

A

RNA polymerase I

B

RNA polymerase IV

C

RNA polymerase III

D

RNA polymerase II

Explanation Comments

A

It proofreads newly synthesized DNA strands

B

It unwinds the DNA double helix

C

It synthesizes RNA primers

D

It seals the gaps between Okazaki fragments

Explanation Comments

A

It consists of three structural genes involved in lactose metabolism

B

It is involved in glucose metabolism

C

It is regulated by a repressor protein and an inducer molecule

D

It is constitutively expressed regardless of the presence of lactose

Explanation Comments

A

Synthesis of a complementary DNA strand

B

Formation of a peptide bond

C

Addition of a poly-A tail

D

Removal of introns

Explanation Comments

A

It joins Okazaki fragments together

B

It proofreads newly synthesized DNA strands

C

It unwinds the DNA double helix

D

It synthesizes new DNA strands

Explanation Comments

A

Release of the completed polypeptide from the ribosome

B

Binding of tRNA to the A site of the ribosome

C

Formation of peptide bonds between amino acids

D

Recognition of the start codon

Explanation Comments

A

Gregor Mendel

B

Charles Darwin

C

Jean-Baptiste Lamarck

D

Alfred Russel Wallace

Explanation Comments

A

Convergent evolution

B

Divergent evolution

C

Coevolution

D

Adaptive radiation

Explanation Comments

All MCQs

What is the function of the enzyme DNA ligase in DNA replication?

Explanation:

Which of the following DNA repair mechanisms is considered error-free and primarily operates during the S phase of the cell cycle?

Explanation:

In eukaryotic cells, which RNA polymerase is responsible for transcribing genes encoding ribosomal RNA (rRNA)?

Explanation:

What is the function of the enzyme primase in DNA replication?

Explanation:

Which of the following is a characteristic feature of the lac operon in bacteria?

Explanation:

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

Explanation:

What is the primary function of the enzyme helicase during DNA replication?

Explanation:

Which of the following processes occurs during the elongation phase of translation?

Explanation:

Which scientist is credited with proposing the theory of natural selection?

Explanation:

What is the term for the process by which species evolve similar traits independently in response to similar environmental pressures?

Explanation:

Quick Links