Quiz for DNA & RNA

Q1: What is the function of tRNA during protein synthesis?

A. It acts as a template for amino acid sequence. B. It synthesizes mRNA. C. It carries amino acids to ribosomes. D. It modifies DNA sequences.

Q2: Which base is not found in RNA?

A. Adenine B. Guanine C. Thymine D. Uracil

Q3: Which enzyme is responsible for the synthesis of RNA from DNA?

A. DNA polymerase B. RNA polymerase C. Ligase D. Helicase

Q4: Which of the following is not a component of a nucleotide?

A. Phosphate group B. Pentose sugar C. Amino acid D. Nitrogenous base

Q5: The backbone of DNA is made up of:

A. Phosphate and sugar B. Sugar and base C. Phosphate and base D. Base and base

Q6: In DNA, adenine pairs with:

A. Cytosine B. Thymine C. Guanine D. Uracil

Q7: The process of transcription occurs in the:

A. Nucleus B. Cytoplasm C. Mitochondria D. Golgi apparatus

Q8: Which enzyme unwinds the DNA strand during replication?

A. DNA polymerase B. Helicase C. Ligase D. Primase

Q9: The number of hydrogen bonds between G and C base pairs is:

A. 1 B. 2 C. 3 D. 4

Q10: Which form of RNA carries genetic information from DNA?

A. rRNA B. tRNA C. mRNA D. snRNA

Q11: The central dogma of molecular biology involves:

A. Replication → Translation → Transcription B. Translation → Transcription → Replication C. Transcription → Translation → Replication D. Replication → Transcription → Translation

Q12: Which base is found only in RNA?

A. Thymine B. Adenine C. Uracil D. Guanine

Q13: Which part of the DNA molecule carries genetic information?

A. Sugar B. Phosphate C. Base sequence D. Histones

Q14: The enzyme responsible for joining Okazaki fragments is:

A. Helicase B. DNA polymerase I C. Ligase D. Primase

Q15: Which RNA is most abundant in cells?

A. mRNA B. tRNA C. rRNA D. snRNA

Q16: The anticodon is found on:

A. mRNA B. rRNA C. tRNA D. DNA

Q17: Which is the correct sequence of events in protein synthesis?

A. Transcription → Translation B. Translation → Transcription C. Replication → Translation D. Translation → Replication

Q18: Which bond connects the nitrogenous base to the sugar in a nucleotide?

A. Covalent bond B. Peptide bond C. Phosphodiester bond D. Glycosidic bond

Q19: The 5’ end of a DNA strand has a free:

A. Phosphate group B. OH group C. Amino group D. Methyl group