KCET Biology Practice Test || Biology Exam Questions 51-60

51. Match the stages of prophase I given in Column-I with their features in Column-II and choose the correct options from the choices given below:
Column - I                                   Column - II
(a) Leptotene                         (i) Exchange of genetic materials between non-sister chromatids of the homologous chromosomes
(b) Zygotene                           (ii) Chromosomes visible under light microscope
(c) Pachytene                         (iii) Dissolution of synaptonemal complex
(d) Diplotene                           (iv) Chromosomes start pairing together
(e) Diakinesis                          (v) Terminalisation of chiasmata

(1) a – v, b – iv, c – i, d – iii, e - ii (2) a – iv, b – i, c – ii, d – iii, e - v (3) a – ii, b – iv, c – i, d – iii, e - v (4) a – i, b – ii, c – iii, d – iv, e - v

52. Read the given statements and choose the correct option:
Statement I : In Calvin cycle, Carboxylation is catalysed by PEP Carboxylase
Statement II : In Hatch-Slack pathway, Carboxylation is catalysed by RuBP Carboxylase

(1) Statement I is true but Statement Il is false (2) Statement I is false but Statement II is true (3) Both Statement I and Statement I are false (4) Both Statement I and Statement Il are true

53. The TCA cycle starts with the condensation of acetyl group with

(1) Citric acid (2)   Ketoglutaric acid (3) Succinic acid (4) Oxaloacetic acid

54. Match the plant growth hormones of Column-I with suitable chemical derivatives present in Column-II and choose the correct option given below:
Column - I                                   Column - II
(a) Abscisic acid                         (i) Adenine derivative
(b) Gibberellins                          (ii) Indole acetic acid
(c) Kinetin                                (iii) Carotenoid derivative
(d) Auxin                                  (iv) Terpens

(1) a – iii, b – i, c – iv, d – ii (2) a – iii, b – iv, c – i, d – ii (3) a – iii, b – i, c – ii, d – iv (4) a – i, b – ii, c – iii, d – iv

55. The respiratory mechanism controlled by medulla oblongata can be altered by

(1) Chemosensitive area in the medulla (2) Both Pneumotaxic and Chemosensitive areas of pons and medulla oblongata (3) Corpus callosum of brain (4) Pneumotaxic center in the pons

56. Which among the three layers of blood vessel wall – Tunica intima, Tunica media and Tunica Externa is comparatively thin in the veins?

(1) Tunica intima (2) Tunica externa (3) Both tunica media and tunica externa (4) Tunica media

57. In nephron, transport of substances: like sodium chloride and urea is facilitated by the special arrangement called counter current mechanism that comprises of

(1) Henle's loop and glomerulus (2) Vasa Recta and collecting duct (3) Ascending limb and collecting duct (4) Henle’s loop and Vasa Recta

58. In the mechanism of muscle contraction or shortening of muscle, the ______ get reduced whereas the ____ retain the length.

(1) I bands, A bands (2) Z line, I bands (3) A bands, Z line (4) A bands, I bands

59. Identify the correct sequence of action potential as it arrives at the axon terminal from the choices given below :

(1) Axon terminal  Synaptic cleft  Synaptic vesicles  Post-synaptic neuron  Post-synaptic membrane (2) Axon terminal  Post-synaptic membrane  Synaptic cleft  Synaptic vesicles  Post-synaptic neuron (3) Axon terminal  Synaptic vesicles  Post-synaptic membrane  Synaptic cleft  Post-synaptic neuron (4) Axon terminal  Synaptic vesicles  Synaptic cleft  Post-synaptic membrane  Post-synaptic neuron

60. Identify the statement/s given below that does not correspond to the functions of cortisol
(i) Maintains cardiovascular system and kidney functions
(ii) Produces anti-inflammatory reactions
(iii) Maintains electrolyte balance, osmosis and blood pressure
(iv) Suppresses immune response
(v) Stimulates RBC production

(1) (iii) and (v) only (2) (ii) only (3) (iv) only (4) (i) and (ii) only

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