Photosynthesis in Higher Plants MCQ Questions & Answers in Botany

271. Which one is a $${C_4}$$-plant?

A Papaya

B Pea

C Potato

D Maize/Corn

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272. In $${C_3}$$ plants, the first stable product of photosynthesis during the dark reaction is

A Malic acid

B Oxaloacetic acid

C 3-phosphoglyceric acid

D Phosphoglyceraldehyde

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273. The enzyme that catalyses carbon dioxide fixation in $${C_4}$$ plants is

A RuBP carboxylase

B PEP carboxylase

C Carbonic anhydrase

D Carboxy dismutase

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274. True for photosynthesis

A Oxidation of CO₂ and reduction of H₂O

B Process which connectes the biotic and a biotic world

C Exergonic process

D Oxidation of Glucose

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275. Which element is located at the centre of the porphyrin ring in chlorophyll ?

A Manganese

B Calcium

C Magnesium

D Potassium

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276. When the two pigment systems absorb light in what direction does the energy flow between them

A PS-I → PS-II

B PS-II → PS-I

C PS-II → PS-I

D None of the above

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277. The chief product of hill reaction are

A ATP and NADPH₂ in chloroplast

B ATP and NADPH₂ in mitochondria

C Only oxygen

D A reduced substance NADPH₂ ATP and O₂ in chloroplast

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278. Suppose an aquatic plant is placed in a test tube containing distilled water and the tube is stoppered. The tube is left outdoors for 24 hours and the pH value of the water is then measured at regular intervals. Which of the following is the most probable result?

A The pH value is lowest just before sunrise

B The pH value is highest just before sunrise

C The pH value is lowest at noon

D The pH value is lowest just before sunset

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279. Dark reactions of photosynthesis occur in

A Granal thylakoid membranes

B Stromal lamella membranes

C Stroma outside photosynthetic lamellae

D Periplastidial space

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280. The substrate for photorespiration is

A Phosphoglyceric acid

B Glycolate

C Serine

D Glycine

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271. Which one is a $${C_4}$$-plant?

272. In $${C_3}$$ plants, the first stable product of photosynthesis during the dark reaction is

273. The enzyme that catalyses carbon dioxide fixation in $${C_4}$$ plants is

274. True for photosynthesis

275. Which element is located at the centre of the porphyrin ring in chlorophyll ?

276. When the two pigment systems absorb light in what direction does the energy flow between them

277. The chief product of hill reaction are

278. Suppose an aquatic plant is placed in a test tube containing distilled water and the tube is stoppered. The tube is left outdoors for 24 hours and the pH value of the water is then measured at regular intervals. Which of the following is the most probable result?

279. Dark reactions of photosynthesis occur in

280. The substrate for photorespiration is

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