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CBSE Class 10 Question Bank 2022 : Biology - Set 12 (Mother's Public School, Bhubaneswar)

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Trinath
Loyola School, Bhubaneswar

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MOTHER S PUBLIC SCHOOL BIOLOGY REVISION TEST (CLASS-X) DATE : 25.9.2021 Grade X-Biology-Chapter- Life Processes-Revision test set 12 I.Read the following and answer the questions from 1 to 5. We need energy to perform various activities. This energy is derived from the catabolism of various components of food, e.g. proteins, carbohydrates, fats, etc. Oxygen is required for catabolic processes and carbon dioxide is released in the process. So, the body requires a continuous exchange of gases, oxygen from the atmosphere is taken inside and carbon dioxide produced is given out. In human beings, respiratory pigment called haemoglobin present in RBCs has very high affinity for oxygen. In tissues, exchange of gases occurs between oxygenated blood and tissue cells. 1. The rate at which oxygen moves from the alveoli of our lungs into our blood: (a) depends on the difference in oxygen concentration between the alveoli and the blood. (b) depends on the colour of the alveoli. (c) depends on the availability of energy to transport gases across the membrane. (d) none of the above 2. The given graph illustrates the changes in lung volume during the process of breathing.The change from II to III indicates the (a) movement of diaphragm away from the lungs (b) expansion of the thoracic cavity (c)movement of air out of the lungs (d) expansion of ribs. 3. Which process occurring in human body does notinvolve 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 4. Refer to the given figure and answer the following question. Which of these parts (I) are the actual sites of respiratory gas exchange? (II) is the common passage for air and food? (III) is provided with incomplete cartilaginous rings? (IV)relaxes and gets back to its original shape during expiration?

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