SET Biotechnology Practice Test 6

51. ------ is the primary function of hammerhead ribozyme.

A) Synthesis of RNA B) Degradation of DNA C) Cleavage of RNA phosphodiester bonds D) Regulation of gene expression

52. What is the role of Aurora B kinase enzyme during mitosis?

A) Down regulate chromosome condensation B) Correction of kinetochore attachments C) Separation of sister chromatids D) Transport chromosomes to the end of kinetochore

53. Franklin’s X ray diffraction images which was crucial for Watson and crick’s DNA model:

A) Photo 51 B) Photo 62 C) Image 31 D) Pattern 14

54. The primary mechanism by which DNA Polymerase ensures fidelity during replication:

A) Complementary base pairing B) Processivity β clamp C) Proofreading and editing D) Helicase activity

55. The ion channel involved in the repolarisation phase action potentials?

A) Voltage gated potassium channels B) Voltage gated sodium channels C) Calcium activated potassium channels D) Chloride channels

56. Plants adapted to hot, dry environments are characterised with:

A) C3 photosynthesis B) C4 photosynthesis C) CAM photosynthesis D) Crassulacean photosynthesis

57. Identify the true statement about Km:

A) High Km indicates high substrate affinity B) Km changes with substrate concentration C) Km changes with enzyme concentration D) Km is independent of enzyme concentration

58. The type of inhibition which occurs when the inhibitor binds to the enzyme substrate complex:

A) Competitive inhibition B) Non-competitive inhibition C) Uncompetitive inhibition D) Mixed inhibition

59. The type of biosensor which measures changes in the refractive index of a solution:

A) Optical biosensor B) Electrochemical biosensor C) Piezoelectric biosensor D) Surface Plasmon Resonance biosensor

60. The primary location of LDH-1 isoenzyme is -----.

A) Skeletal muscle B) Heart muscle C) Liver tissue D) Brain tissue