Other Biology Answers

The .......... is a small, flattened and strip of muscle fibre of .......... size it is situated in the upper lateral wall of .......... atrium :-
(1) SA node, 0.3 mm, Left
(2) AV node, 0.3 mm, Right
(3) SA node, 0.3 mm, Right
(4) AV node, 0.3 mm, Left

Which one has mineralized matrix, similar to bone but harder, that forms the primary mass of each tooth ?
(1) enamel
(2) dentine
(3) cementum
(4) pulp

0 – + 45 – 0 known as action potential occurs at :-
(1) Dendron
(2) Cyton
(3) Axon
(4) Synapse

Which of the following will give a pair of enantiomors :-
(1) [Co(NH3)4Cl2]NO2
(2) [Cr(NH3)6][Co(CN)6]
(3) [Co(en)2Cl2]Cl
(4) [Pt(NH3)4][PtCl6]
(en = NH2CH2CH2NH2)

The site of proteolysis of tri iodothyronin & tetraiodothyronin
(1) E.R.
(2) Golgi body
(3) Lysosome
(4) in thyroid follicle

In the following diagram where the Na+ voltage gate become close & K+ voltage opens :-

Image not present http://www.onlinetestseries.in/data/images/common/papers/partners/32/1176/image131.png

(1) A (2) B (3) C (4) D

Read the following four statements (AD)
(A) EPSP develops due to opening of Na+ ligand channels
(B) IPSP develops due to opening of Cl– ligand channels
(C) GABA develops IPSP and Ach develops EPSP.
(D) Physiological properties of nerve fibres are detected by cathode ray oscilloscope (C.R.O.)
How many of the above statements are correct?
(1) Four (2) Two (3) One (4) Three

Identify Neurotransmitters which produces IPSP :-
(A) Dopamine
(B) Nor adrenaline
(C) Glycine
(D) Glutamate
Choose the correct option :-
(1) A, D (2) B, C (3) A, C (4) C, D

Horizontal neuron cell of Retina is an example of which of the following neuron :-
(1) Pseudounipolar
(2) Bipolar
(3) Unipolar
(4) None of the above

During efflux of K+ first phase of the process is
(1) Active from symplast
(2) Passive from symplast
(3) Passive from apoplast
(4) Active from apoplast