Multiple Choice Questions (MCQ) on Life Processes
21-Glucose is a ___ carbon molecule.
(A) four
(B) five
(C) six
(D) seven
22-Pyruvate is a ___ carbon molecule.
(A) three
(B) four
(C) five
(D) six
23-The process of breaking molecules in the absence of oxygen is called
(A) respiration
(B) aerobic respiration
(C) anaerobic respiration
(D) none of the above
24-Lactic acid is a ___ carbon molecule
(A) three
(B) four
(C) five
(D) six
25-Breaking down of glucose in the presence of oxygen produces
(A) carbon dioxide
(B) water
(C) energy
(D) all of the above
26- The energy released during the process of respiration is used to make an ___ molecule
(A) ATP
(B) ADP
(C) AVP
(D) ATC
27-ATP can be used in the cells for the
(A) contraction of muscles
(B) protein synthesis
(C) conduction of nervous impulses
(D) all of the above
28-Following is true about lungs
(A) Within the lungs, the passage divides into smaller and smaller tubes
(B) The lungs always contain a residual volume of air so that there is sufficient time for oxygen to be absorbed
(C) Both (A) and (B)
(D) None of the above
29- In human beings, the respiratory pigment is
(A) hemoglobin
(B) insulin
(C) enzyme
(D) none of the above
30-Haemoglobin is present in
(A) red blood corpuscles
(B) white blood corpuscles
(C) plasma
(D) none of the above
ANSWERS:
21-(C), 22-(A), 23-(C), 24-(A), 25-(D), 26-(A), 27-(D), 28-(C), 29-(A), 30-(A)