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

What is the name of the process by which a protein is degraded?

  1. Protein degradation

  2. Protein synthesis

  3. Transcription

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

Protein degradation is the process by which a protein is degraded.

Multiple choice

What is the name of the process by which a protein is transported to its final destination?

  1. Protein targeting

  2. Protein synthesis

  3. Transcription

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

Protein targeting is the process by which a protein is transported to its final destination.

Multiple choice

What is the name of the process by which a protein interacts with other molecules?

  1. Protein interaction

  2. Protein synthesis

  3. Transcription

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

Protein interaction is the process by which a protein interacts with other molecules.

Multiple choice

CRISPR-Cas9 is a gene-editing tool that utilizes which type of RNA?

  1. Transfer RNA (tRNA)

  2. Messenger RNA (mRNA)

  3. Small Interfering RNA (siRNA)

  4. Guide RNA (gRNA)
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

CRISPR-Cas9 utilizes Guide RNA (gRNA) to target and cut specific DNA sequences, enabling precise genome editing.

Multiple choice

What are the three main types of RNA?

  1. Messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA)

  2. Messenger RNA (mRNA), transfer RNA (tRNA), and microRNA (miRNA)

  3. Messenger RNA (mRNA), transfer RNA (tRNA), and small interfering RNA (siRNA)

  4. Messenger RNA (mRNA), transfer RNA (tRNA), and long non-coding RNA (lncRNA)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The three main types of RNA are messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA).

Multiple choice

What is the role of mRNA in protein synthesis?

  1. Carries genetic information from DNA to the ribosomes

  2. Transfers amino acids to the ribosomes

  3. Catalyzes the formation of peptide bonds

  4. Proofreads the newly synthesized protein
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Messenger RNA (mRNA) carries the genetic information from DNA to the ribosomes, where it serves as a template for protein synthesis.

Multiple choice

What is the role of tRNA in protein synthesis?

  1. Carries genetic information from DNA to the ribosomes

  2. Transfers amino acids to the ribosomes

  3. Catalyzes the formation of peptide bonds

  4. Proofreads the newly synthesized protein
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Transfer RNA (tRNA) molecules carry specific amino acids to the ribosomes during protein synthesis, based on the genetic code carried by mRNA.

Multiple choice

What is the role of rRNA in protein synthesis?

  1. Carries genetic information from DNA to the ribosomes

  2. Transfers amino acids to the ribosomes

  3. Catalyzes the formation of peptide bonds

  4. Forms the structure of the ribosome
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Ribosomal RNA (rRNA) forms the structural framework of the ribosome, the cellular machinery responsible for protein synthesis.

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. Small nuclear RNA (snRNA)
Reveal answer Fill a bubble to check yourself
Correct answer
Explanation

Small nuclear RNA (snRNA) is not a type of RNA molecule. It is a type of non-coding RNA that is involved in the processing of pre-messenger RNA (pre-mRNA) in the nucleus.

Multiple choice

What is the name of the process by which cells repair damaged DNA?

  1. DNA replication

  2. DNA transcription

  3. DNA repair

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

DNA repair is the process by which cells identify and repair damaged DNA molecules. This process is essential for maintaining the integrity of the genome and preventing mutations.

Multiple choice

What is the name of the process by which cells convert genetic information encoded in DNA into functional proteins?

  1. DNA replication

  2. DNA transcription

  3. DNA repair

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

DNA translation is the process by which cells convert the genetic information encoded in DNA into a sequence of amino acids, which are the building blocks of proteins.

Multiple choice

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

  1. RNA polymerase I

  2. RNA polymerase II

  3. RNA polymerase III

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

RNA polymerase IV is not a type of RNA polymerase. It is a type of enzyme that is involved in the synthesis of small nuclear RNA (snRNA) molecules.

Multiple choice

What is the name of the genetic code that specifies the relationship between codons in mRNA and the corresponding amino acids?

  1. The genetic code

  2. The codon table

  3. The amino acid code

  4. The protein code
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The genetic code is the set of rules that specifies the relationship between codons in mRNA and the corresponding amino acids. This code is universal, meaning that it is the same in all living organisms.

Multiple choice

Which genetic material is present in mitochondria?

  1. Nuclear DNA

  2. Mitochondrial DNA (mtDNA)

  3. Ribosomal RNA (rRNA)

  4. Transfer RNA (tRNA)
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Mitochondria contain their own circular DNA, known as mitochondrial DNA (mtDNA), which is distinct from the nuclear DNA.

Multiple choice

What is the primary function of mitochondrial ribosomes?

  1. Protein Synthesis

  2. RNA Transcription

  3. DNA Replication

  4. Lipid Metabolism
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Mitochondrial ribosomes are responsible for synthesizing proteins that are essential for mitochondrial function.