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Life Processes | Respiration Multiple Choice Questions with Answers for CBSE Class 10Â
1. Form of energy released in respiration is :
(A) Chemical energy
(B) Electrical energy
(C) Mechanical energy
(D) Radiant energy
Solution
Sol. In Respiration energy is generated in the form of ATP. ATP is energy currency of cell.
2. The cellular respiration differs from breathing in that in cellular respiration.
(A) Air rich in oxygen is taken in and air poor in oxygen is given out
(B) Glucose is oxidised to CO2 and water with release of energy
(C) Oxygen is bound to haemoglobin producting oxyhaemoglobin in the lungs.
(D) None of above
Solution
Sol. Breathing is only exchange of gases while in the cellular respiration food is oxidized and energy is liberated in the form of ATP.
3. Photosynthesis is different from respiration being :
(A) Catabolic process
(B) Anabolic process
(C) Both catabolic and anabolic process
(D) None of these
Solution
Sol. In photosynthesis carbohydrate formed from CO2 and H2O. It is constructive process. (Anabolic Process)
4. The first phase of cellular respiration in an animal is :
(A) Anaerobic
(B) ETS
(C) Glycolysis
(D) Fermentation
Solution
Sol. In first phase of cellular respiration glucose molecule splits into two molecules of pyruvic acid and this step is known as Glycolysis.
5. Respiration results in :
(A) Increase in weight
(B) Decrease in weight
(C) No change in weight
(D) None of the above
Solution
Sol. In respiration dry weight of body is decreased because it converts chemical energy present in food into kinetic energy.
6. Respiration is :
(A) a light dependent process
(B) not affected by light and dark
(C) Anabolic reaction
(D) a dark dependent process
Solution
Sol. Respiration does not depend on light and drak.
7. Respiration is different from photosynthesis :
(A) It is independent of light
(B) It takes place in all type of cells
(C) It is aerobic and anaerobic
(D) All of the above
Solution
Sol. Respiration occurs in all types of living cells of the body whether green or nongreen, aerobic or anaerobic and takes place throughout day and night.
8. Trachea do not collapse when there is not much air because they are :
(A) Thick and muscular
(B) Having cartilaginous rings
(C) Have valves
(D) Supported by larynx
Solution
Sol. Trachea do not collapse when there is not much air because they are having incomplete C shaped cartilagenous rings. Which are made up of hyaline cartilage.
9. Exchange of gases in lungs is called :
(A) Simple diffusion
(B) Active transport
(C) Passive transport
(D) Osmosis
Solution
Sol. Exchange of gases in lungs is called simple diffusion. Diffusion takes place in alveoli of lungs.
10. The function of tracheal hair is to :
(A) Pass mucous out
(B) Pass air out
(C) Pass mucous in
(D) Pass air it
Solution
Sol. The function of tracheal hairs is to pass mucus out.
11. In cockroaches, air enters the body through :
(A) Lungs
(B) Gills
(C) Spiracles
(D) Skin
Solution
Sol. In cockroaches, air centers the body through spiracles spiracles, are similar to the nostrils of human beings.
12. Breathing out of carbon dioxide is called :
(A) Inhalation
(B) Reduction
(C) Exhalation
(D) Degeneration
Solution
Sol. Breathing out of CO2 is called exhalation. CO2 and other harmful gases are released out of the body.
13. Which is the energy currency of the cell :
(A) ATP
(B) Proteins
(C) NADP
(D) Carbohydrates
Solution
Sol. ATP is the energy currency of the cell which are produced in mitochondria.
14. In humans gas exchange between the environment and the body takes place in the :
(A) Larynx
(B) Bronchi
(C) Alveoli
(D) Trachea
Solution
Sol. In humans, gases are exchanged between the environment and the body takes place in the alveoli are the structural and functional unit of lungs.
15. Respiration is the process in which :
(A) Energy is stored in the form of ADP
(B) Energy is released and stored in the form of ATP
(C) Energy is not released at all
(D) Energy is used up
Solution
Sol. Respiration is the process in which energy is released and it is stored in the form of ATP by breaking down of glucose.
16. A normal man respires in a minute :
(A) 10-15 times
(B) 14-18 times
(C) 20-25 times
(D) 25-30 times
Solution
Sol. A normal man respires 14-18 times in a minute.
17. External respiration is :
(A) Respiration in skin cells
(B) Gaseous exchange between organisms and external environment
(C) Gaseous exchange between cells and tissue fluid
(D) Both B and C
Solution
Sol. External respiration is gaseous exchange between organisms and external environment.
18. Respiration converts potential or stored energy of food into :
(A) Chemical energy
(B) Mechanical energy
(C) Kinetic energy
(D) All forms of energy
Solution
Sol. Respiration converts potential or stored energy of food into chemical energy.
19. During inspiration, the volume of thoracic cavity :
(A) increases
(B) Decreases
(C) remains same
(D) first increases then decreases
Solution
Sol. During inspiration, the volume of the thoracic cavity increases.
20. If a person, living at sea level, migrates to about 8000 feet high hill, his blood after about fifteen days will :
(A) Increase in volume
(B) Have fewer WBCs
(C) Have greater number of RBCs and more haemoglobin
(D) Have more plasma
Solution
Sol. Due to low pressure at height more RBC’s will be there.
21. Respiratory system is derived from :
(A) Endoderm
(B) Mesoderm
(C) Ectoderm
(D) None of the above
Solution
Sol. Respiratory system is derived from endoderm.
22. During aerobic respiration, glucose is :
(A) partially oxidised
(B) completely oxidised
(C) not oxidised
(D) reduced
Solution
Sol. During aerobic respiration there is complete oxidation of glucose.
23. Germinating seeds are used in the experiment because :
(A) only radicle respires
(B) germinating seeds actively metabolise food to get energy
(C) germinating seeds do not metabolise
(D) more energy is provided by the sun
Solution
Sol. Germinating seeds perform metabolic activities to release CO2.
24. Which of the following is not the product of respiration :
(A) Carbon dioxide
(B) Oxygen
(C) Water
(D) Alcohol
Solution
Sol. During respiration oxygen is utilized.
25. Dough kept overnight at a warm place becomes soft and spongy due to :
(A) Absorption of CO2 from atmosphere
(B) Osmosis
(C) Fermentation
(D) Diffusion of air into the dough
Solution
Sol. Aerobic respiration (fermentation) takes place making dough soft & spongy.