| 71. | Oxygen, which is produced by photosynthesis, comes from – |
A. by water | |
B. carbon dioxide | |
C. from chlorophyll | |
D. from phosphoglyceric acid |
| 72. | Photosynthesis takes place – |
A. in the nucleus | |
B. in mitochondria | |
C. in chloroplast | |
D. in peroxisome |
| 73. | The first stable compound of photosynthesis is – |
A. phosphoglyceric acid | |
B. starch | |
C. glucose | |
D. diphosphoglyceric acid |
| 74. | Such a biological process in which oxidation of sugar and fat takes place and energy is released is called – |
A. breathing | |
B. transpiration | |
C. photosynthesis | |
D. Fermentation |
| 75. | The instrument for measuring respiration is called – |
A. potometer | |
B. oxenometer | |
C. Autometer | |
D. respirometer |
| 76. | Carbon dioxide gas is released |
A. under ascent | |
B. under transpiration | |
C. under photosynthesis | |
D. under respiration |
| 77. | It is not advisable to sleep under trees at night, because – |
A. They release carbon dioxide at night | |
B. They release O₂ at night | |
C. They release CO₂ and O₂ at night. | |
D. None of these |
| 78. | ATP stands for – |
A. adenosine triphosphate | |
B. adenine triphosphate | |
C. adenosine diphosphate | |
D. adenosine tetraphosphate |
| 79. | The end product of anaerobic respiration is – |
A. pyruvic acid | |
B. ethyl alcohol | |
C. starch | |
D. Sugar |
| 80. | The end product of oxygen respiration is – |
A. CO₂ and water | |
B. O₂ and water | |
C. CO₂ and O₂ | |
D. ethyl alcohol |