CBSE Class 10 Science Biology Respiration Assignment Set B

Question. The process of respiration is concerned with
(a) liberation of oxygen
(b) liberation of carbon dioxide
(c) liberation of energy
(d) intake of oxygen

Answer: C

Question. The common immediate source of energy for cellular activity is
(a) NAD
(b) ATP
(c) DNA
(d) RNA

Answer: B

Question. If the CO₂ concentration in the blood increases, the rate of breathing will
(a) decrease
(b) stop
(c) increase
(d) have no effect

Answer: C

Question. Vocal cards occur in
(a) pharynx
(b) glottis
(c) bronchial tube
(d) larynx

Answer: D

Question. In man, which of the following structures is analogous to the spiracles of cockroach ?
(a) Alveoli
(b) Lungs
(c) Bronchioles
(d) Nostrils

Answer: D

Question. Which of the following is not a characteristic of good respiratory surface ?
(a) Thin and moist
(b) Large surface area
(c) Close to oxygen and gas transport
(d) Thick and dry surface

Answer: D

Question. Respiration in yeast
(a) takes place in the presence of oxygen
(b) yields lactic acid and carbon dioxide
(c) in anaerobic and produces carbon dioxide
(d) takes place only in darkness

Answer: C

Question. Which of the following prevents collapsing of trachea ?
(a) Diaphragm
(b) Ribs
(c) Cartilaginous ring
(d) Muscles

Answer: C

Question. In anaerobic respiration
(a) O₂ is taken in
(b) CO₂ is taken in
(c) O₂ is given out
(d) CO₂ is given out

Answer: D

Question. Volume of air inspired or expired with each normal breath is called
(a) tidal volume
(b) inspiratory capacity
(c) total lung capacity
(d) residual volume

Answer: A

Question. Exchange of respiratory gases takes place in an earthworm through
(a) moist skin
(b) gills
(c) trachea
(d) lungs

Answer: A

Question. Correct statement is
(a) roots of plant respire through lenticles and stomata.
(b) stem of plant respire through lenticles
(c) both A and B are correct
(d) both A and B are incorrect

Answer: B

Question. Which of the following gases makes the most stable combination with the hemoglobin of red blood cells.
(a) CO₂
(b) CO
(c) O₂
(d) N₂

Answer: B

Question. Most of the carbon dioxide in the blood is carried in the form of
(a) carbonic acid
(b) bicarbonates
(c) carbaminohaemoglobin
(d) dissolved CO₂

Answer: B

Question. Breathing rate in mammals in controlled by a part of the brain called the
(a) thalamus
(b) hypothalamus
(c) medulla oblongata
(d) cerebellum

Answer: C

Question. Disease called pleurisy is due to
(a) inflammation of pleura
(b) inflammation of trachea
(c) inflammation of alveoli
(d) none of these above

Answer: A

Question. Muscle cells engaged in vigorous activity build up a high concentration of
(a) lactic acid
(b) pyruvic acid
(c) alcohol
(d) cholesterol

Answer: A

Question. Leaves respire with the help of
(a) lenticles
(b) stomata
(c) plasmodesmata
(d) cuticle

Answer: B

Question. Oxygen is transported in blood mainly by
(a) leucocytes
(b) erythrocytes
(c) thrombocytes
(d) blood plasma SUBJECTIVE

Answer: B