List of top Plant Biotechnology Questions on Metabolism asked in ICAR AIEEA (PG)

Match List-I with List-II

List-I (Physiological process) & List-II (Site of the reaction)
(A). Glycolysis & (IV). Cytoplasm
(B). Citric Acid Cycle & (I). Mitochondrial Matrix
(C). $\text{F}_o\text{-F}_1$ ATP synthase & (III). Inner membrane of Mitochondria
(D). Calvin Cycle & (II). Stroma of Chloroplast

Choose the correct answer from the options given below:

The pyruvate carboxylase catalyzed conversion of pyruvate to oxaloacetate is a(an)

Which of the following statements is true about the Citrate?

(A). It is a secondary alcohol
(B). It is a chiral molecule
(C). It is formed by Claisen condensation reaction
(D). It is prochiral and a tertiary alcohol

Choose the correct answer from the options given below:

Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).

Assertion (A) : Iodoacetate selectively inhibits the glycolytic enzyme glyceraldehyde-3-phosphate dehydrogenase.
Reason (R) : Iodoacetate is a chelating agent that chelates the magnesium ion and makes it unavailable for the catalytic action of glyceraldehyde-3-phosphate dehydrogenase.

In light of the above statements, choose the correct answer from the options given below.

The serum level of which of the following metabolites can effectively distinguish "Vitamin B12 deficiency" from "Folate deficiency" ?

Desmotubule in the plasmodesmata joining the adjacent plant cells is formed from:

Most commonly used chemicals to break dormancy in seeds requiring light (Ex. Oats, Lettuce, Gladiolus etc.) are:
(A). Potassium nitrate
(B). Kinetin
(C). Thiourea
(D). NAA
Choose the correct answer from the options given below:

Identify the crop(s) requiring vernalization:
(A). Barley
(B). Sunflower
(C). Carrot
(D). Ragi
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The end product of anaerobic respiration is

Match List-I with List-II:

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Which of the following statement(s) is/are true about the Type IV isozyme of the hexokinase?
(A). It is highly specific for glucose and is thus often called as glucokinase.
(B). It has much higher \( K_m \) value for glucose
(C). It is allosterically inhibited by glucose-6-phosphate
(D). It is a non-inducible enzyme and follows Michaelis-Menten Kinetics

Choose the correct answer from the options given below:

Which of the following statement(s) is/are true about the role of Malonyl CoA in fatty acid metabolism?
(A). It is an inhibitor of the enzyme “Carnitine acyltransferase”
(B). High levels of malonyl CoA suppress fatty acid entry into the mitochondria
(C). High levels of malonyl CoA lead to reduced flux of fatty acids towards triglycerides' biosynthesis
(D). Low levels of malonyl CoA favour fatty acid oxidation

Choose the correct answer from the options given below:

Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A): The nitrogenase enzyme is considered to be a sluggish and inefficient enzyme.
Reason (R): The nitrogenase enzyme must go through several catalytic reduction cycles, wherein the two components viz. Fe-Protein and MoFe-Protein get dissociated from each other following each electron transfer, before final product i.e. ammonia appears.
In light of the above statements, choose the correct answer from the options given below:

Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A): The citric acid cycle is amphibolic in nature rather than only catabolic.
Reason (R): Several biosynthetic pathways utilize citric acid cycle intermediates as precursors for the synthesis of important products.
In light of the above statements, choose the correct answer from the options given below:

The correct sequence for the flow of electrons between following components of mitochondrial electron transport chain is:
(A). NADH dehydrogenase
(B). Cytochrome \( bc_1 \) complex
(C). Ubiquinone
(D). Cytochrome C
Choose the correct answer from the options given below:

Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A): In the early part of the twentieth century, 2,4-Dinitrophenol (DNP) was prescribed as a “diet pill” for weight loss.
Reason (R): The DNP reduces metabolic rate by uncoupling oxidative phosphorylation from electron transport.
In light of the above statements, choose the correct answer from the options given below:

The sequence for the action of the following enzymes of fatty acid \(\beta\)-oxidation pathway is:
(A). \(\beta\)-hydroxyacyl-CoA dehydrogenase
(B). Thiolase
(C). Enoyl CoA hydratase
(D). Acyl CoA - dehydrogenase
Choose the correct answer from the options given below:

Match List-I with List-II

Choose the correct answer from the options given below:

Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A) : Carbohydrates are more efficient storage form of the energy as compared to the triacylglycerols.
Reason (R) : Carbohydrates are more oxidized and hence yield more energy on oxidation.
In light of the above statements, choose the correct answer from the options given below:

Which of the following enzymes of Glycolytic pathway has achieved the catalytic perfection in the sense that any increase in its catalytic efficiency would not increase the rate of reaction catalysed by it?

Which of the following metabolites is not an intermediate in the triglyceride biosynthesis by Kennedy pathway?

Some of the exceptional properties of regulatory/allosteric enzymes are:
(A) Their Kinetics do not obey the Michaelis-Menten equation.
(B) They are mostly monomeric in nature.
(C) They have more than one substrate binding sites and the substrate binding to different sites is mutually independent, exclusive and noncooperative.
(D) Binding of effector molecules to them may lead to their activation or inhibition.

Which of the following metabolites is not an intermediate in the triglyceride biosynthesis by Kennedy pathway?

Some of the exceptional properties of regulatory/allosteric enzymes are:
(A) Their Kinetics do not obey the Michaelis-Menten equation.
(B) They are mostly monomeric in nature.
(C) They have more than one substrate binding sites and the substrate binding to different sites is mutually independent, exclusive and noncooperative.
(D) Binding of effector molecules to them may lead to their activation or inhibition.