SET Biotechnology Practice Test 2

11. Haworth projection in carbohydrate chemistry is used for:

A) Visualising molecular orbits B) Representing ring conformations C) Predicting stability of glycosidic linkage D) Analysing molecular dynamics

12. The carbohydrate mostly found in bacterial cell walls:

A) Peptidoglycan B) Chitin C) Pectin D) Lignocellulose

13. For a protein with 100 amino acids, how many possible sequences are there?

A) (100)20 B) (2)100 C) (100)2 D) (20)100

14. The first action spectrum based on photosynthesis was demonstrated using aerobic bacterium illuminated with different components of light split by a prism. This experiment was done by:

A) Jan Ingenhousz B) T. W. Engelmann C) Julius Robert Mayer D) Van Helmont

15. The precursor molecule for pyrimidine biosynthesis is:

A) Ribose 5- phosphate B) PRPP C) Carbamoyl phosphate D) Sedoheptulose - 7 - phosphote

16. The primary role of apolipoprotein B-48 is:

A) Transport cholesterol B) Facilitate lipid uptake by adipose tissue C) Anchor lipoprotein lipase to endothelial cells D) Assemble chylomicrons in the intesine

17. The role of troponin-tropomyosin complex in muscle contraction is to:

A) Bind calcium ions and initiate contraction B) Inhibit contraction by blocking myosin binding sites C) Regulate muscle relaxation D) Facilitate muscle lengthening

18. The function of bacterial nucleoid associated protein HU is:

A) Initiation of conjugation B) Transcriptional regulation C) DNA condensation and organization D) Transposition

19. State the limitation of using 16SrRNA sequencing for bacterial identification:

A) High variability among strains B) Insufficient DB coverage C) Limited resolution at species level D) All of the above

20. Which of the following is a family of bacteriophage lambda?

A) Siphoviridae B) Corticoviridae C) Microviridae D) Pedoviridae

Answer Key:

• 11. B) Representing ring conformations
• 12. A) Peptidoglycan
• 13. D) (20)100
• 14. B) T. W. Engelmann
• 15. C) Carbamoyl phosphate
• 16. D) Assemble chylomicrons in the intesine
• 17. B) Inhibit contraction by blocking myosin binding sites
• 18. C) DNA condensation and organization
• 19. D) All of these
• 20. A) Siphoviridae