General Science and Nature

A

Turner syndrome

B

Fragile X syndrome

C

Duchenne muscular dystrophy

D

Down syndrome

Explanation Comments

A

It synthesizes tRNA molecules

B

It synthesizes rRNA molecules

C

It repairs damaged DNA

D

It synthesizes mRNA molecules from a DNA template

Explanation Comments

A

They regulate alternative splicing of the mRNA molecule

B

They protect the mRNA molecule from degradation by exonucleases

C

They signal the termination of translation

D

They facilitate the binding of ribosomes during translation initiation

Explanation Comments

A

It allows for the production of multiple protein isoforms from a single gene

B

It increases the stability of mRNA molecules

C

It prevents transcription initiation

D

It regulates the activity of RNA polymerase

Explanation Comments

A

It inhibits transcription initiation

B

It stabilizes mRNA molecules

C

It regulates translation

D

It promotes transcription initiation

Explanation Comments

A

It is a mechanism of post-transcriptional gene silencing mediated by small RNA molecules

B

It occurs during translation initiation

C

It involves the conversion of RNA to DNA

D

It is specific to prokaryotic cells

Explanation Comments

A

It promotes transcription of all bacterial genes

B

It controls DNA replication in bacterial cells

C

It regulates the expression of genes involved in glucose metabolism

D

It regulates the expression of genes involved in lactose metabolism

Explanation Comments

A

Deletion

B

Insertion

C

Translocation

D

Substitution

Explanation Comments

A

They proofread newly synthesized DNA strands for errors

B

They remove supercoils ahead of the replication fork

C

They unwind the DNA double helix

D

They join Okazaki fragments together

Explanation Comments

A

Duplication

B

Inversion

C

Transcription

D

Deletion

Explanation Comments

All MCQs

Which of the following genetic disorders is caused by a deletion mutation?

Explanation:

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

Explanation:

What is the role of the 5' cap and poly-A tail in eukaryotic mRNA?

Explanation:

What is the significance of alternative splicing in eukaryotic gene expression?

Explanation:

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

Explanation:

Which of the following statements accurately describes the process of RNA interference (RNAi)?

Explanation:

What is the function of the lac operon in bacterial cells?

Explanation:

Which of the following types of mutations can lead to a frameshift in the reading frame of a gene?

Explanation:

What is the primary function of topoisomerases in DNA replication?

Explanation:

Which of the following is not a type of chromosomal mutation?

Explanation:

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