1
NEET 2021
MCQ (Single Correct Answer)
+4
-1
During muscular contraction which of the following events occur?

(1) 'H' zone disappears

(2) 'A' band widens

(3) 'I' band reduces in width

(4) Myosine hydrolyzes ATP, releasing the ADP and Pi.

(5) Z-lines attached to actins are pulled inwards.

Choose the correct answer from the options given below.
A
(2), (4), (5), (1) only
B
(1), (3), (4), (5) only
C
(1), (2), (3), (4) only
D
(2), (3), (4), (5) only
2
NEET 2021
MCQ (Single Correct Answer)
+4
-1
Match List-I with List-II.

List-I List-II
(a) Adaptive radiation (i) Selection of resistant varieties due to excessive use of herbicides and pesticides
(b) Convergent evolution (ii) Bones of forelimbs in Man and Whale
(c) Divergent evolution (iii) Wings of Butterfly and Bird
(d) Evolution by anthropogenic action (iv) Darwin Finches


Choose the correct answer from the options given below.
A
(a) (b) (c) (d)
(i) (iv) (iii) (ii)
B
(a) (b) (c) (d)
(iv) (iii) (ii) (i)
C
(a) (b) (c) (d)
(iii) (ii) (i) (iv)
D
(a) (b) (c) (d)
(ii) (i) (iv) (iii)
3
NEET 2021
MCQ (Single Correct Answer)
+4
-1
Assertion (A) : A person goes to high altitude and experiences 'altitude sickness' with symptoms like breathing difficulty and heart palpitations.

Reason (R) : Due to low atmospheric pressure at high altitude, the body does not get sufficient oxygen.

In the light of the above statements, choose the correct answer from the options given below
A
(A) is false but (R) is true
B
Both (A) and (R) are true and (R) is the correct explanation of (A)
C
Both (A) and (R) are true but (R) is not the correct explanation of (A)
D
(A) is true but (R) is false
4
NEET 2021
MCQ (Single Correct Answer)
+4
-1
Which of these is not an important component of initiation of parturition in humans?
A
Release of Prolactin
B
Increase in estrogen and progesterone ratio
C
Synthesis of prostaglandins
D
Release of Oxytocin
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
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CBSE
Class 12