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31 Years NEET Previous Year Questions: Photosynthesis - 3 - NEET MCQ


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25 Questions MCQ Test Biology 31 Years NEET Chapterwise Solved Papers - 31 Years NEET Previous Year Questions: Photosynthesis - 3

31 Years NEET Previous Year Questions: Photosynthesis - 3 for NEET 2024 is part of Biology 31 Years NEET Chapterwise Solved Papers preparation. The 31 Years NEET Previous Year Questions: Photosynthesis - 3 questions and answers have been prepared according to the NEET exam syllabus.The 31 Years NEET Previous Year Questions: Photosynthesis - 3 MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for 31 Years NEET Previous Year Questions: Photosynthesis - 3 below.
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31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 1

C4-cycle was discovered by [1994]

Detailed Solution for 31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 1

 C4 cycle was worked out by Hatch and Slack (1966). C4 cycle occured in C4 plants.

31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 2

A photosynthesising plant is releasing 18O more than the normal. The plant must have been supplied with [1993]

Detailed Solution for 31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 2

The phenomenon of breaking up of water into hydrogen and oxygen in the illuminated chloroplasts is called photolysis. Oxygen comes from photolysis of water was verified by Ruben & Kamen (1941).

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31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 3

Maximum solar energy is trapped by [1993]

Detailed Solution for 31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 3

Algae are the most efficeint photosynthesizing organisms.

31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 4

The carbon dioxide acceptor in Calvin cycle/ C3-plants is [1993, 95, 96, 99]

Detailed Solution for 31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 4

The primary CO2 acceptor in C3 plants is Ribulose-1, 5-diphosphate (RuBP) which forms a 3 carbon compound 3-phosphoglyceric acid.

31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 5

Which one is a C4-plant? [1993]

Detailed Solution for 31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 5

Maize, Sugarcane, Sorghum, Atriplex, Panicum are examples of C4 plants.

31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 6

Translocation of carbohydrate nutrients usually occurs in the form of [1992]

Detailed Solution for 31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 6

Translocation of organic solutes occur through sieve tubes in the form of sucrose. Transportable form of sugar is sucrose.

31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 7

Chlorophyll a occurs in [1992]

Detailed Solution for 31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 7

Chlorophyll a is found in all photosynthetic plants except bacteria. Hence, it is termed as universal photosynthetic pigment.

31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 8

All types of plastids possess essentially the same structure because they [1992]

Detailed Solution for 31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 8

Depending upon their colour, plastids are of three main types – leucoplasts, chromoplasts and chloroplasts.

31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 9

Photosystem II occurs in [1992]

Detailed Solution for 31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 9

Photosystem II is a photosynthetic pigment system that is located in the appressed part of grana thylakoids.

31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 10

The enzyme that catalyses carbon dioxide fixation in C4 plants is [1992]

Detailed Solution for 31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 10

In C4 plants, the primary acceptor of CO2 is phosphoenol pyruvate. It combines with carbon dioxide in the presence of PEP carboxylase to form oxalo-acetic acid in mesophyll cells.

31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 11

Formation of ATP in photosynthesis and respiration is an oxidation process which utilises the energy from [1992]

Detailed Solution for 31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 11

Electrons provide energy for the formation of ATP in photosynthesis and respiration.

31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 12

Ferredoxin is a constituent of [1991]

Detailed Solution for 31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 12

In PSI, when the electron passes from ferredoxin and plastoquinone, the electron loses sufficient energy to form ATP from ADP and inorganic phosphate.

31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 13

During monsoon, the rice crop of eastern states of India shows lesser yield due to limiting factor of [1991]

Detailed Solution for 31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 13

 According to law of limiting factors given by Blackman, when a process depends upon a number of factors which are separate, the rate of the process is limited by the pace of the slowest factor. Rate of yield is dependent on light as photosynthesis is dependent on light. 

During monsoon, the light is dim and so this reduces rate of photosynthesis and hence yield

31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 14

Which technique has helped in investigation of Calvin cycle? [1991]

Detailed Solution for 31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 14

In 1954-55 Calvin traced the pathway of carbon fixation by using radioactive isotope method by using 14CO2 and gave the Calvin cycle.

31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 15

Dark reactions of photosynthesis occur in [1991]

Detailed Solution for 31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 15

Dark reaction occurs in the stroma or matrix of chloroplasts. It is independent of light but depends on the products of light reaction (ATP and NADPH– assimilatory process).

31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 16

Photosynthetic pigments found in the chloroplasts occur in [1991]

Detailed Solution for 31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 16

Photosynthetic pigments occur on photosynthetic thylakoids of chloroplasts. A stack of thylakoids is called granum.

31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 17

The first carbon dioxide acceptor in C4-plants is [1990, 92]

Detailed Solution for 31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 17

The primary acceptor of CO2 in C4 plants is phosphoenol pyruvate or PEP. PEP in mesophyll cells combine with CO2 and converted into 4 carbon compound Oxaloacetic acids by PEP carboxylase. In C3 plant Ribulose 1, 5–diphosphate is primary acceptor of CO2.

31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 18

Kranz anatomy is typical of [1990]

Detailed Solution for 31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 18

C4 plants have a characteristic leaf anatomy called kranz anatomy with two distinct choloroplast containing cells mesophyll and bundle sheath cells.

31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 19

A very efficient converter of solar energy with net productivity of 2-4 kg/m2 or more is the crop of [1989]

Detailed Solution for 31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 19

C4 cycle occurs in C4 plants like sugarcane, maize. C4 cycle provides a more efficient way of CO2 fixation than C3 cycle and hence give more productivity. Rest are C3 plants.

31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 20

Greatest producers of organic matter are [1989]

Detailed Solution for 31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 20

Phytoplanktons (algae) of oceans are the highest producers of organic matter.

31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 21

In C4 plants, Calvin cycle operates in [1989]

Detailed Solution for 31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 21

C4 plants are specialised plants for better CO2 assimilation found in hot environment. They have a characteristic leaf anatomy called kranz anatomy showing two distinct choloroplast containing cells mesophyll and bundle sheath cells. Mesophyll cells are located very near to bundle sheath cells and are the site for C4 cycle i.e. CO2 is first fixed as a 4 carbon compounds oxalocetic acid by the action of PEP carbooxylase. The second carboxylation event occur in stroma of chloroplast of bundle sheath cell through C3 cycle.

31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 22

The substrate for photorespiration is [1989]

Detailed Solution for 31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 22

Light dependent uptake of O2 and release of CO2 in C3 photosynthetic cell is called photorespiration. Glycolate (Glycolic acid) is the chief metabolite of photorespiration and also its substrate. Other important metabolities are the amino acids glycine and serine. But phosphoglyceric acid (PGA) is a lipid and is not substrate of photorespiration.

31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 23

The size of chlorophyll molecule is [1988]

Detailed Solution for 31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 23

Chlorophyll has a tetrapyrrole porphyrin ring as head (15 × 15Å) and a long hydrocarbon tail called phytol (20 Å) tail  attached to the ring structure.

31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 24

Carbon dioxide joins the photosynthetic pathway in [1988]

Detailed Solution for 31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 24

Photosynthesis is completed in two phases-light and dark phases. In dark phase (Blackman’s reaction or biosynthetic phase) carbohydrates are synthesised from carbon dioxide in stroma of chloroplast using ATP and NADPH products of light reactions.

31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 25

NADP+ is reduced to NADPH in [1988]

Detailed Solution for 31 Years NEET Previous Year Questions: Photosynthesis - 3 - Question 25

Non cyclic photophosphorylation is not only connected with ATP synthesis but also production of NADPH. It involves two photosystems—PSI and PSII. PSII (680) receive electrons from photolysis of water and transfer it to PSI (700) to form NADPH from NADP+. The hydrogen required for reduction comes from breaking of water molecules.

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