Question

Q2) Read the following and answer any four questions from 2(i)to 2()
All living cells require energy for various activities. This energy is available by
the breakdown of simple carbohydrates either using oxygen or without using
oxygen.
(0) Energy in the case of higher plants and animals is obtained by
a) Breathing
b) Tissue respiration
c) Organ respiration
d) Digestion of food
ii) The graph below represents the blood lactic acid concentration of an athlete
during a race of 400 m and shows a peak at point D.​

Answer 1

Explanation:

Energy currency of the cell is Adenosine Triphosphate or ATP.

(b) Oxidative breakdown of carbohydrates to release energy is known as cellular respiration.

(c) Organisms which respires throughout life anaerobically are yeast and archaea.

(d) Glycolysis is a common phase to both aerobic and anaerobic respiration.

(e) Aerobic respiration is the release of energy from glucose which requires oxygen.

(f) Calcium hydroxide solution is used to remove CO

2

from the air.

Answer 2

Answer:

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