PYQSide ExamsMy practice

Respiration in Plants · Question 17

NEET (UG) 2020MCQEasy📈 Topic in 38% papers+4−1
1

The number of substrate level phosphorylations in one turn of citric acid cycle is

  1. Zero
  2. One
  3. Three
  4. Two

Answer

(2) One

Solution

As per NCERT, in the TCA cycle succinyl-CoA is oxidised to succinic acid, and this step is coupled with the synthesis of one molecule of GTP:

Succinyl-CoA + GDP + Pi Succinic acid + CoA + GTP

⇒ This is the only substrate level phosphorylation in one turn of the cycle (GTP is then converted to ATP).

∴ Number of substrate level phosphorylations per turn = 1

Answer: (2)

NEET (UG) 2020

Keep practising — Respiration in Plants

2

Conversion of glucose to glucose-6-phosphate, the first irreversible reaction of glycolysis, is catalyzed by

  1. Enolase
  2. Phosphofructokinase
  3. Aldolase
  4. Hexokinase
NEET (UG) 2019
3

Respiratory Quotient (RQ) value of tripalmitin is :

  1. 0.07
  2. 0.09
  3. 0.9
  4. 0.7
NEET (UG) 2019
4

What is the role of NAD+ in cellular respiration?

  1. It is the final electron acceptor for anaerobic respiration.
  2. It functions as an enzyme.
  3. It functions as an electron carrier.
  4. It is a nucleotide source for ATP synthesis.
NEET 2018
5

Which of these statements is incorrect?

  1. Glycolysis operates as long as it is supplied with NAD that can pick up hydrogen atoms.
  2. Enzymes of TCA cycle are present in mitochondrial matrix.
  3. Oxidative phosphorylation takes place in outer mitochondrial membrane.
  4. Glycolysis occurs in cytosol.
NEET 2018
6

Which statement is wrong for Krebs' cycle?

  1. There is one point in the cycle where FAD+ is reduced to FADH2.
  2. During conversion of succinyl CoA to succinic acid, a molecule of GTP is synthesised.
  3. The cycle starts with condensation of acetyl group (acetyl CoA) with pyruvic acid to yield citric acid.
  4. There are three points in the cycle where NAD+ is reduced to NADH + H+.
NEET 2017
7

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

  1. Glucose-6-phosphate
  2. Fructose 1, 6-bisphosphate
  3. Pyruvic acid
  4. Acetyl CoA
NEET 2016 (Phase 2)
8

Oxidative phosphorylation is

  1. formation of ATP by transfer of phosphate group from a substrate to ADP
  2. oxidation of phosphate group in ATP
  3. addition of phosphate group to ATP
  4. formation of ATP by energy released from electrons removed during substrate oxidation.
NEET 2016 (Phase 2)
9

Cytochromes are found in

  1. cristae of mitochondria
  2. lysosomes
  3. matrix of mitochondria
  4. outer wall of mitochondria.
AIPMT 2015 (Cancelled)
10

In which one of the following processes CO2 is not released?

  1. Aerobic respiration in plants
  2. Aerobic respiration in animals
  3. Alcoholic fermentation
  4. Lactic fermentation
AIPMT 2014
11

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

  1. Pyruvic acid
  2. Acetyl CoA
  3. Glucose-6-phosphate
  4. Fructose-1,6-bisphosphate
NEET 2013

All Respiration in Plants PYQs →

PDFDownload Respiration in Plants PYQs as PDF Free, with answer key and a QR code to every solution — print it or study offline⬇
All NEET Botany chapters
Class 11The Living WorldBiological ClassificationPlant KingdomMorphology of Flowering PlantsAnatomy of Flowering PlantsCell: The Unit of LifeCell Cycle and Cell DivisionTransport in PlantsMineral NutritionPhotosynthesis in Higher PlantsRespiration in PlantsPlant Growth and Development
Class 12Reproduction in OrganismsSexual Reproduction in Flowering PlantsPrinciples of Inheritance and VariationMolecular Basis of InheritanceStrategies for Enhancement in Food ProductionMicrobes in Human WelfareOrganisms and PopulationsEcosystemBiodiversity and ConservationEnvironmental Issues
Other chaptersBiomolecules (Biology)