PrepBharat

1. Photosynthesis is a
a) Physical process
b) Chemical process
c) Physico–chemical process
d) Physiological process

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2. All living forms on earth depend on _________ for energy.
a) Sun
b) Hydrothermal vent
c) Volcanic eruption
d) Moon

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3. During photosynthesis, light energy is used to synthesize
a) Inorganic compound
b) Organic compound
c) Both (a) and (b)
d) None of theses

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4. Photosynthesis is important because
a) It is the primary source of all food on earth
b) It is responsible for the release of \[O_{2}\]
c) Both (a) and (b)
d) None of theses

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5. Select the incorrect statement from the following:
a) All animals including human depend on plant for their food.
b) The use of energy from sunlight by plants doing photosynthesis is the basis of life on earth.
c) Green plants carry out photosynthesis.
d) None of the above

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6. Which of the following is required for photosynthesis?
a) \[CO_{2}\]
b) Chlorophyll
c) Light
d) All of these

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7. An experiment using two leaves, a variegated leaf or a leaf that was covered with black paper and one that was exposed to light on testing these leaves for starch shows that photosynthesis occurs only in _________ part of leaf in the_________ of sunlight
a) non-green, presence
b) green, presence
c) non-green, absence
d) green, absence

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8. Half leaf experiment proved that _________ is required for photosynthesis.
a) Carbon dioxide
b) Chlorophyll
c) Light
d) Oxygen

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9. Which of the following substance is used in half leaf experiment to absorb CO₂?
a) HCl
b) KOH
c) \[HNO_{3}\]
d) \[H_{2}SO_{4}\]

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10. _________ in 1770 performed a series of experiments that revealed the essential role of air in growth of green plants.
a) Jan Ingenhousz
b) Joseph Priestley
c) Von Sachs
d) Cornelius Van Niel

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