Biology

Molecular Genetics

851 Questions

Molecular genetics explores the mechanisms of genetic information transfer, including DNA replication, transcription, and translation. It is a core component of biology syllabi. These concepts frequently appear in general science sections of major competitive exams.

DNA replicationTranscription processTranslation processRNA typesCentral dogma

Molecular Genetics Questions

Multiple choice

Which genetic testing method is commonly used to detect single nucleotide polymorphisms (SNPs)?

  1. Karyotyping

  2. Polymerase chain reaction (PCR)

  3. DNA microarrays

  4. Next-generation sequencing (NGS)
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

DNA microarrays are commonly used to detect single nucleotide polymorphisms (SNPs) by analyzing the hybridization of DNA samples to complementary probes.

Multiple choice

Which genetic testing method is commonly used to detect copy number variations (CNVs)?

  1. Karyotyping

  2. Polymerase chain reaction (PCR)

  3. DNA microarrays

  4. Next-generation sequencing (NGS)
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Next-generation sequencing (NGS) is commonly used to detect copy number variations (CNVs) by analyzing the depth of coverage of DNA sequencing reads.

Multiple choice

What is the name of the short RNA molecule that primes DNA synthesis?

  1. Messenger RNA (mRNA)

  2. Transfer RNA (tRNA)

  3. Ribosomal RNA (rRNA)

  4. Primer RNA
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Primer RNA is a short RNA molecule that is synthesized by primase and provides a starting point for DNA polymerase to add nucleotides during replication.

Multiple choice

What is the name of the process by which DNA is copied during replication?

  1. Transcription

  2. Translation

  3. Replication

  4. Mutation
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Replication is the process by which DNA is copied during cell division, ensuring that each daughter cell receives a complete copy of the genetic material.

Multiple choice

What is the name of the process by which DNA is repaired after damage?

  1. Transcription

  2. Translation

  3. Replication

  4. DNA repair
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

DNA repair is the process by which DNA is repaired after damage, such as that caused by UV radiation or chemical mutagens.

Multiple choice

What is the name of the process by which DNA is copied from RNA?

  1. Transcription

  2. Translation

  3. Replication

  4. Reverse transcription
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Reverse transcription is the process by which DNA is copied from RNA, using the enzyme reverse transcriptase.

Multiple choice

Which of the following molecules is believed to be a precursor to the formation of RNA, a crucial molecule in biological systems?

  1. Glycolaldehyde (HOCH2CHO)

  2. Ribose (C5H10O5)

  3. Adenine (C5H5N5)

  4. Uracil (C4H4N2O2)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Glycolaldehyde is believed to be a precursor to the formation of RNA, as it can undergo reactions to form ribose, a sugar molecule that is a component of RNA.

Multiple choice

What is the name of the technique that uses the Raman effect to study the structure of RNA?

  1. Raman spectroscopy

  2. Surface-enhanced Raman spectroscopy

  3. Tip-enhanced Raman spectroscopy

  4. Surface-enhanced resonance Raman spectroscopy
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Surface-enhanced resonance Raman spectroscopy (SERRS) is a technique that uses the Raman effect to study the structure of RNA.

Multiple choice

What are exosomes?

  1. Small vesicles released by cells

  2. A type of protein

  3. A type of DNA

  4. A type of RNA
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Exosomes are small vesicles released by cells that contain various molecules, including proteins, lipids, and nucleic acids.

Multiple choice

What is the term used to describe the study of the structure and function of RNA molecules?

  1. Genomics

  2. Transcriptomics

  3. Proteomics

  4. Metabolomics
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Transcriptomics is the study of the structure and function of RNA molecules.

Multiple choice

Which of the following is an example of a non-coding RNA molecule involved in epigenetic regulation?

  1. MicroRNA

  2. Transfer RNA

  3. Ribosomal RNA

  4. Messenger RNA
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

MicroRNAs (miRNAs) are small non-coding RNA molecules that play a role in epigenetic regulation by targeting and silencing specific messenger RNA (mRNA) molecules.

Multiple choice

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

  1. Messenger RNA (mRNA)

  2. Transfer RNA (tRNA)

  3. Ribosomal RNA (rRNA)

  4. Deoxyribonucleic acid (DNA)
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

DNA is not a type of RNA molecule. It is a different type of nucleic acid that stores genetic information.

Multiple choice

The process by which DNA is copied into RNA is called:

  1. Replication

  2. Transcription

  3. Translation

  4. Mutation
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Transcription is the process by which DNA is copied into RNA.

Multiple choice

The process by which RNA is converted into protein is called:

  1. Replication

  2. Transcription

  3. Translation

  4. Mutation
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Translation is the process by which RNA is converted into protein.

Multiple choice

Which of the following is NOT a type of gene regulation?

  1. Transcriptional regulation

  2. Translational regulation

  3. Post-translational regulation

  4. DNA methylation
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

DNA methylation is not a type of gene regulation. It is a type of epigenetic modification that can affect gene expression.