RPSC Senior Scientific Officer Serology Part A Zoology Paper 2019
Total Questions – 100 Duration – Two hours
Part A – Zoology – 60 Questions
A functional eukaryotic chromosome has
(a) one telomere, one origin of replication and one centromere
(b) two telomere, many origin of replication and one centromere
(c) two telomere, one origin of replication and one centromere
(d) one telomere, many origin of replication and one centromere
In meiosis – I
(a) Duplicated homologous chromosomes line up independently at metaphase plate
(b) Unduplicated homologous chromosomes line up independently at metaphase plate
(c) Duplicated homologous chromosomes pair before lining up at metaphase plate
(d) Unduplicated homologous chromosomes pair before lining up at metaphase plate
Cell cycle is regulated by
(a) Kinins
(b) Cytokinins
(c) Cyclins
(d) Prostaglandins
The acidic pH in the lysosome is maintained by
(a) Guanosine Triphosphate (GTP) dependent proton pump in the lumen
(b) Adenosine Triphosphate (ATP) dependent proton pump on the membrane
(c) Hydrochloric acid in the lumen
(d) Guanosine Triphosphate (GTP) dependent proton pump on the membrane
The hameoglobin of a human foetus
(a) has a lower affinity for oxygen than that of an adult
(b) its affinity for oxygen is the same as that of an adult
(c) has a higher affinity for oxygen than that of an adult
(d) has no relation with oxygen affinity
In a man, deciducous teeth begin to erupt through the gums at about __________ months and as set of _______teeth is usually completely formed by the age of ________years.
(a) 1, 18, 1
(b) 3, 36, 3
(c) 6, 20, 2
(d) 3, 24, 1
Which of the following is not CORRECT?
(a) Tidal volume – Amount of air involved in one normal inhalation and exhalation
(b) Inspiratory reserve – Amount of air beyond tidal volume that can be taken in with deepest possible inhalation
(c) Expiratory reserve – Amount of air that remains in the lung after forceful exhalation
(d) Vital capacity – Sum of tidal volume, inspiratory reserve and expiratory reserve
Which statements are true for juxtamedullary nephrons?
(A) Their renal capsule lie in the outer portion of cortex
(B) They have short loop of Henle that penetrate only into the outer region of medulla
(C) Their loop of Henle receive blood supply from peritubular capillaries and vasa recta
(D) They make up 15-30 percent of total nephron
(E) They have a thin segment and a thick segment in their ascending limb of loop of Henle.
(a) A,B,C
(b) C,D,E
(c) B,C,D
(d) A,E,B
What is not true with reference to cytotaxonomy?
(a) Comparative studies of chromosomes is used for classification
(b) Each plant and animal species has a definite number of chromosomes in its cells.
(c) Based upon similarities and dissimilarities in biochemical composition of a species.
(d) Characters of the chromosome are helpful in determining taxonomical position of a species.
The innovation that freed vertebrates from being ties to water for reproduction and allowed them to radiate into diverse terrestrial environment, was the development of
(a) Bony appendages
(b) Placenta
(c) Cleidoic egg
(d) Wings
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