Table of Contents
PHOTOSYNTHESIS IN HIGHER PLANTS NEET QUESTIONS
Photosynthesis is a physio-chemical process by which green plants use light energy to drive the synthesis of organic compounds. It is the process by which green plants convert inorganic compounds like C02 and H2O in organic food like carbohydrates in the presence of chlorophyll and sunlight. It is an enzyme regulated anabolic process. The process of photosynthesis takes place in the green leaves of the plants because chloroplasts are abundantly present in the mesophyll cell of the leaves. It was observed that the rate of photosynthesis is directly proportional to the intensity of light, i.e., rate increases with the increase in intensity of light till the plant achieved the saturation point.
The process of photosynthesis takes place in following two steps:
(i) Light reaction or the photochemical phase.
(ii) Dark reaction or the biosynthetic phase.
Green plants carry out ‘photosynthesis’, a physio-chemical process by which they use light energy to drive the synthesis of organic compounds. … This chapter focusses on the structure of the photosynthetic machinery and the various reactions that transform light energy into chemical energy.
This chapter aims to make the students aware of the structure of the photosynthetic machinery and all those reactions that convert light energy into chemical energy. Photosynthesis in green plants is an indispensable process because of two reasons. The first reason is that it serves as the basis of existence for all known food chains on earth. The second reason is that through this process oxygen is released by the green plants into the atmosphere, which is the only survival instrument for all forms of life. Delve into the brief on the topics of this chapter to find out more about them.
‘Photosynthesis in Higher Plants’ of Biology decodes the complex chemicals and reactions that play a vital part in changing the light energy into chemical energy when photosynthesis occurs in green plants, which have pigment chlorophyll present in them. In addition to this, the chapter also discusses the technicality (organization of photosynthetic machinery) of the photosynthesis process.
PHOTOSYNTHESIS IN HIGHER PLANTS NEET QUESTIONS – MCQ’s
1. Which metal ion is a constituent of chlorophyll?
(a) Iron
(b) Copper
(c) Magnesium
(d) Zinc
Answer: C
2. Which pigment acts directly to convert light energy into chemical energy?
(a) Chlorophyll a
(b) Chlorophyll b
(c) Xanthophyll
(d) Carotenoid
Answer: A
3. Which range of wavelength (in nm) is called Photosynthetically Active Radiation (PAR)?
(a) 100 to 390
(b) 390 to 430
(c) 400 to 700
(d) 760 to 10000
Answer: B
4. Which light range is most effective in photosynthesis?
(a) Blue
(b) Green
(c) Red
(d) Violet
Answer: C
5. Chemosynthetic bacteria obtain energy from
(a) Sun
(b) Infra-red rays
(c) Organic substances
(d) Inorganic chemicals
Answer: D
6. Energy required for ATP synthesis in PSII comes from
(a) Proton gradient
(b) Electron gradient
(c) Reduction of glucose
(d) Oxidation of glucose
Answer: D
7. During light reaction in photosynthesis, which of the following are formed?
(a) ATP and sugar
(b) Hydrogen, O2 and sugar
(c) ATP, hydrogen donor and O2
(d) ATP, hydrogen and O2 donor
Answer: B
8. Dark reaction in photosynthesis is so called because
(a) It can occur in dark also.
(b) It does not depend on light energy
(c) It cannot occur during day light.
(d) It occurs more rapidly at night
Answer: A
9. PEP is a primary CO2 acceptor in
(a) C4 plants
(b) C3 plants
(c) C2 plants
(d) Both C3 and C4 plants
Answer: B
10. Splitting of water is associated with
(a) Photosystem I
(b) Lumen of thylakoid
(c) Both photosystems I and II
(d) Inner surface of thylakoid member
Answer: B
ALSO VISIT: TOP TEN QUESTIONS ON KINGDOM PROTISTA
