Q1. Which type of RNA forms the major structural and catalytic component of ribosomes?A. mRNAB. tRNAC. rRNAD. snRNA
Q2. Which of the following statements about enhancers is correct?A. Enhancers decrease transcription efficiency.B. Enhancers function only in prokaryotes.C. Enhancers increase transcription efficiency.D. Enhancers act as the binding site for ribosomes.
Q3. Which scientist proposed the one gene-one enzyme hypothesis?A. Watson and CrickB. Beadle and TatumC. Frederick GriffithD. Hershey and Chase
Q4. Which of the following molecules carries amino acids to the ribosome during translation?A. mRNAB. tRNAC. rRNAD. snRNA
Q5. Which of the following statements about transcription factors is correct?A. They enhance the activity of DNA polymeraseB. They help regulate gene expressionC. They are involved in translationD. They only bind to exons
Q6. What is the role of sigma (σ) factor in bacterial transcription?A. Termination of transcriptionB. Binding of RNA polymerase to the promoterC. Ribosome assemblyD. Splicing of pre-mRNA
Q7. Which of the following is incorrect about histones?A. Histones help in DNA packaging.B. Histones are positively charged proteins.C. Histones are found in both prokaryotic and eukaryotic cells.D. Histones form nucleosomes by wrapping DNA.
Q8. Which of the following statements about rRNA is correct?A. rRNA carries amino acids to the ribosome.B. rRNA functions as a catalytic molecule in translation.C. rRNA contains codons that specify amino acids.D. rRNA is directly translated into proteins.
Q9. What is the function of chaperone proteins?A. To assist in protein foldingB. To facilitate DNA replicationC. To degrade misfolded proteinsD. To regulate transcription
Q10. What is the function of the poly-A tail in eukaryotic mRNA?A. It helps in ribosome bindingB. It protects mRNA from degradationC. It plays a role in DNA replicationD. It assists in protein folding