RSMSSB JSA Biology 2019 Paper

RSMSSB Junior Scientific Assistant Biology Paper 2019

In human brain, the majority produciton of Cerebro Spinal Fluid (CSF) is form
(a) Pons
(b) Thalamus
(b) Choroid plexuses
(d) Pyramids of medulla

Type of cells found in organs have been paird. which among the following is/are wrong pairs
(1) Ependymal cells – Brain
(2) Parietal cells – Stomach
(3) Parafollicular cells – Testis
(4) Thyrotrophs – Thyroid
(a) (1) and (3)
(b) (2) and (3)
(c) (3) and (4)
(d) (1) and (4)

Which of the following structure is NOT found in inner Ear?
(a) Cochlea
(b) Semicircular canals
(c) Concha
(d) Organ of Corti

In Eye, where rods and cones are absent and no image detection takes place?
(a) Retina
(b) Yellow spot
(c) Blind spot
(d) Fovea centralis

In human, fertilization occurs in which part of an oviduct?
(a) Fimbriae
(b) Isthmus
(c) Ampulla
(d) Infudibulum

Syphilis a sexually transmitted disease is caused by
(a) Treponema pallidum
(b) Francisella tularensis
(c) Yersinia pesits
(d) Borrelia burgdorferi

Distance between two adjacent Z lines in a muscle fibre is known as
(a) H zone
(b) Sarcomere
(c) Myofibril
(d) M zone

Protozoan which help in digestion of cellulose in certain insects is
(a) Monocystis
(b) Giardia
(c) Trichonympha
(d) Opalina

Which one of the following DNA molecules has left handed helix?
(a) B-DNA
(b) Z-DNA
(c) A-DNA
(d) C-DNA

In Snapdragon the ratio of flowered plants red (RR), pink (Rr) and white (rr) in F2 generation is 1:2:1. This shows
(a) Law of Segregation
(b) Law of Dominance
(c) Incomplete Dominance
(d) Law of Independent Assortment