Botany MCQs for NEET — Practice Questions with Answers

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Final electron acceptor in respiration is (B.H.U. 1984, Karnataka 1994; A.F.M.C. 1998, A.M.U. 2001)

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Explanation

In cellular respiration, the final electron acceptor is oxygen. Oxygen accepts electrons at the end of the electron transport chain, which allows for the production of water and the continuation of the process of oxidative phosphorylation.

Oxidative phosphorylation is found in (M.P.P.M.T. 1987, 2002)

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Explanation

Oxidative phosphorylation occurs in the mitochondria. It is a part of the electron transport chain where ATP is synthesized as electrons are transferred from electron donors to oxygen through a series of protein complexes.

In Opunita and other succulents, night time R.Q. is (CPMT, 1986)

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RQ of protein rich pulses is ‘ (RPMT. 1989)

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All of the following are concerned with bad health of ecosystem, except

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Explanation

Ecosanitation, or ecological sanitation, is the correct answer as it is not associated with bad health of ecosystems. Ecosanitation is a sustainable approach to sanitation that aims to safely recycle nutrients back to the environment, reduce water pollution, and improve health. On the other hand, biomagnification, eutrophication, and jhum cultivation are processes that can negatively impact ecosystem health.

Connecting link between glycolysis and Krebs cycle is/before entering Krebs cycle pyruvate is changed to (A.F.M.C, 1988; CB.S.E. 1992, 1997; R.PMT. 1992; M.P.P.M.T. 1987, 88, 93, 98, 2001, 2002; AMU. 1987, 2001; J.LPME.R; 1989; C.PMT. 1991, 94; D.P.M.T. 1999; A.UMS. 1994, Mampal 200l, BV. 2002, Kerala 2003, 2004)

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Explanation

The connecting link between glycolysis and the Krebs cycle is Acetyl CoA. After glycolysis, pyruvate is converted into Acetyl CoA before it enters the Krebs cycle. This conversion involves the removal of a carbon atom from pyruvate, releasing it as CO2 and linking the remaining two-carbon molecule to Coenzyme A.

Apparatus to measure rate of respiration and R.Q. is (C.P.M.T. 1991; C.B.S.E. 1992)

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Explanation

A respirometer is an apparatus used to measure the rate of respiration and the Respiratory Quotient (R.Q.). It measures the volume of oxygen consumed and/or the volume of carbon dioxide produced by an organism, which are crucial for determining the rate of respiration and the R.Q.

Terminal cytochrome of respiratory chain which donates electrons to oxygen is (CPMT 1989; CBSE, 1992)

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Explanation

The terminal cytochrome of the respiratory chain which donates electrons to oxygen is Cytochrome a3. This cytochrome is a part of the cytochrome c oxidase complex (Complex IV) in the electron transport chain and is responsible for the final step of electron transfer to oxygen, forming water.

R.Q is maximum when respiratory substrate is (MPPMT. 1992; A.U.M.S. 1992)

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Explanation

Respiratory Quotient (R.Q) is the ratio of the volume of carbon dioxide produced to the volume of oxygen consumed during respiration. For different respiratory substrates, R.Q varies. When malic acid (a type of organic acid) is used as a substrate, it typically shows a higher R.Q value compared to glucose, fats, or proteins. This is because malic acid contains more oxygen in its structure, leading to a higher ratio of CO2 production to O2 consumption.

Krebs cycle is (AMU. 1993)

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