Question

1. Which cell organelle is involved in breakdown of glucose to produce energy for

metabolic activities?


(a) Mitochondria
(b) Chloroplast

(b) Endoplasmic reticulum
(d) Golgi body


2.Which of the following structures is involved in gaseous exchange in woody stem of
a plant?


(a) Stomata
(b) Lenticel

(c) Guard cell
(d) Epidermis


3.During vigorous physical exercise, lactic acid is formed from glucose inside the

muscle cells because


(a) there is lack of oxygen

(b) there is lack of water

(c) there is excess of carbon dioxide

(d) none of the above


4.Which process occurring in human body does not involve energy from respiration?


(a) Contraction of heart muscle (b)Diffusion of oxygen from the alveoli into the blood

(c)Digestion of bread

(d) Maintaining a constant body temperature

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Answer 1

Answer:

mitochondria is evolved in production in energy