Useful for Medical Entrance Exams: AIPMT / AFMC /JIPMER / AIIMS / JIPMER /Manipal UGET / CMC Vellore / AMU/ BHU

AIPMT 2014 Biology Questions (51-60)

51. Stimulation of a muscle fiber by a motor neuron occurs at 
a) The neuromuscular junction
b) The transverse tubules
c) The myofibril
d) The sacroplasmic reticulum

52. Injury localized to the hypothalamus would most likely disrupt
a) Short term memory
b) Co-ordination during locomotion
c) Executive function, such as decision making
d) Regulation of body temperature

53. Which one of the following statements is not correct? 
a) Retinal is the light absorbing portion of visual photo pigments
b) In retina the rods have the photopigment rhodopsin while cones have three different photopigments
c) Retinal is a derivative of vitamin C
d) Rhodopsin is the purplish red protein present in rods only

54. Identify the hormone with its correct matching of source and function 
a) Oxytocin - posterior pituitary, growth and maintenance of mammary glands
b) Melatonin - pineal gland, regulates the normal rhythm of sleepwake cycle
c) Progesterone - corpus-luteum, stimulation of growth and activities of female secondary sex organs
d) Atrial natriuretic factor - ventricular wall increases the blood pressure

55. Which one of the following is wrongly matched? 
a) Transcription-Writing information from DNA to t-RNA
b) Translation-Using information in m-RNA to make protein
c) Repressor protein-Binds to operator to stop enzyme synthesis
d) Operon-Structural genes, operator and promoter

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56. Transformation was discovered by
a) Meselson and Stahl
b) Hershey and Chase
c) Griffith
d) Watson and Crick

57. Fruit colour in squash is an example of
a) Recessive epistasis
b) Dominant epistasis
c) Complementary genes
d) Inhibitory genes
 
58. Viruses have a) DNA enclosed in a protein coat
b) Prokaryotic nucleus
c) Single chromosome
d) Both DNA and RNA

59. The first human hormone produced by recombinant DNA technology is 
a) Insulin
b) Estrogen
c) Thyroxin
d) Progesterone

60. An analysis of chromosomal DNA using the southern hybridisation technique does not use 
a) Electrophoresis
b) Blotting
c) Autoradiography
d) PCR
Learn more: AIPMT Biology (2014)
Questions & Answers: 1-11 / 11-20 21-30 / 31-40 / 41-50 / 61-70 / 71-80 81-90
Answers
51. a) The neuromuscular junction
52. d) Regulation of body temperature
53. c) Retinal is a derivative of vitamin C
54. b) Melatonin - pineal gland, regulates the normal rhythm of sleepwake cycle
55. d) Operon-Structural genes, operator and promoter
56. c) Griffith
57. b) Dominant epistasis
58. a) DNA enclosed in a protein coat
59. a) Insulin
60. d) PCR

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