Biology > STUDY GUIDE > PA 195 Biology A-Level MCQ-Problem-Sets-Protein-Synthesis-Dna & Rna | Biology A-Level MCQ-Problem-Se (All)

PA 195 Biology A-Level MCQ-Problem-Sets-Protein-Synthesis-Dna & Rna | Biology A-Level MCQ-Problem-Sets-QUESTIONS ONLY

Document Content and Description Below

PA 195 Biology A-Level MCQ-Problem-Sets-Protein-Synthesis-Dna & Rna 1. Which type of molecule is the end product of translation? a. amino acid b. DNA c. mRNA d. polypeptide 2. RNA is extra... cted from β cells in the pancreas. It is used to make DNA coding for human insulin. Which enzyme is used to make the DNA? a. DNA ligase b. restriction enzyme c. reverse transcriptase d. RNA polymerase 3. A peptide consists of ten amino acids of four different kinds. What is the theoretical minimum number of tRNA molecules required to translate the mRNA for this peptide? a. 4 b. 10 c. 12 d. 30 4. During the development of the AIDS virus, a long polypeptide is hydrolysed by a protease enzyme, producing several smaller peptides. This viral enzyme is the target of new anti-AIDS drugs. Which feature is essential for the success of these drugs? a. a complex structure that inhibits many types of viral enzyme b. a molecule containing a heavy metal atom that is a non-competitive inhibitor of enzymes c. a protein that can act as a competitive inhibitor of protease enzymes d. a specific structure that inhibits only viral protease 5. A metabolic pathway is What would be the effect of adding a small amount of a non-competitive inhibitor of enzyme 2? a. Enzyme 2 would be partially denatured. b. Substance X would increase in concentration. c. Substance Y would no longer be formed. d. The initial reactant would no longer be metabolised. 6. Which statement describes events during interphase of mitosis? a. Chromosomes start to coil, becoming shorter and fatter. b. Chromosomes line up on the equator of the spindle. c. Chromatids are pulled apart by spindle fibres. d. Chromosomes are replicated ready for the next division. 7. Which statement about the strands of a newly replicated DNA molecule is correct? a. Both strands are made up of newly assembled nucleotides. b. Both strands contain some nucleotides from the original molecule. c. One strand is new and the other is part of the original molecule. d. The sugar-phosphate chains are conserved and new bases are inserted between them. [Show More]

Last updated: 2 years ago

Preview 1 out of 9 pages

Buy Now

Instant download

We Accept: