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NEET BIOLOGYRespiration in PlantsMedium

Question

Which of the following biomolecules is common to respiration-mediated breakdown of fats, carbohydrates and proteins?

A

Glucose-6-phosphate

B

Fructose 1, 6-bisphosphate

C

Pyruvic acid

D

Acetyl Co-A

Step-by-Step Solution

Acetyl CoA is the common intermediate at which the breakdown pathways of fats, carbohydrates, and proteins converge. Specifically, fatty acids from fats are broken down directly into Acetyl CoA before entering the Krebs cycle . Carbohydrates are converted to glucose and then pyruvic acid, which is oxidatively decarboxylated to form Acetyl CoA . Proteins are broken into amino acids, which, depending on their structure, can enter the respiratory pathway as pyruvate or Acetyl CoA . Figure 12.6 in the source material confirms that Acetyl CoA is the common entry point for all three .

Exam Context & Concepts Covered

This question aligns with the NEET BIOLOGY syllabus, specifically targeting concepts from Respiration in Plants. Mastering this topic is crucial for scoring well in the upcoming medical entrance examinations. Solving conceptually related problems will help you understand the nuances of these concepts and improve your problem-solving speed.

BIOLOGYRespiration in Plantsfollowingbiomoleculescommonrespirationmediatedbreakdown

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Which of the following pairs is correctly matched regarding the Electron Transport System (ETS) complexes?

A.ETS Complex I - NADH Dehydrogenase
B.ETS Complex II - Cytochrome bC1
C.ETS Complex III - Cytochrome C oxidase
D.ETS Complex IV - Succinate Dehydrogenase
EasySolve

Which of these statements is incorrect?

A.Enzymes of the TCA cycle are present in the mitochondrial matrix
B.Glycolysis occurs in the cytosol
C.Glycolysis operates as long as it is supplied with NAD that can pick up hydrogen atoms
D.Oxidative phosphorylation takes place in the outer mitochondrial membrane
EasySolve

In glycolysis, the conversion of 1, 3-bisphosphoglyceric acid to 3-phosphoglyceric acid is:

A.Energy yielding process
B.Energy utilising process
C.Phosphorylation process
D.Isomerisation process
MediumSolve

Match List-I with List-II regarding the site of occurrence of respiratory stages: List-I A. Citric acid cycle B. Glycolysis C. Electron transport List-II I. Cytoplasm II. Mitochondrial matrix IV. Inner mitochondrial membrane

A.A-I, B-II, C-IV
B.A-II, B-I, C-IV
C.A-IV, B-II, C-I
D.A-II, B-IV, C-I
EasySolve

Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R): Assertion (A): ATP is used at two steps in glycolysis. Reason (R): First ATP is used in converting glucose into glucose-6-phosphate and second ATP is used in conversion of fructose-6-phosphate into fructose-1-6-diphosphate. In the light of the above statements, choose the correct answer from the options given below:

A.(A) is False but (R) is True
B.Both (A) and (R) are True and (R) is the correct explanation of (A)
C.Both (A) and (R) are True but (R) is not the correct explanation of (A)
D.(A) is True but (R) is False
MediumSolve

What is the role of NAD+ in cellular respiration?

A.It functions as an enzyme
B.It functions as an electron carrier
C.It is a nucleotide source for ATP synthesis
D.It is the final electron acceptor for anaerobic respiration
EasySolve

Which statement is wrong for Krebs' cycle?

A.There is one point in the cycle where FAD+ is reduced to FADH2.
B.During conversion of succinyl CoA to succinic acid, a molecule of GTP is synthesized.
C.The cycle starts with condensation of acetyl group (acetyl CoA) with pyruvic acid to yield citric acid.
D.There are three points in the cycle where NAD+ is reduced to NADH + H+.
EasySolve

Where is the respiratory electron transport system (ETS) located in plants?

A.Mitochondrial matrix
B.Outer mitochondrial membrane
C.Inner mitochondrial membrane
D.Intermembrane space
EasySolve

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