NEET Exam  >  NEET Tests  >  Biology Class 11  >  Test: Aerobic Respiration - NEET MCQ

Test: Aerobic Respiration - NEET MCQ


Test Description

40 Questions MCQ Test Biology Class 11 - Test: Aerobic Respiration

Test: Aerobic Respiration for NEET 2024 is part of Biology Class 11 preparation. The Test: Aerobic Respiration questions and answers have been prepared according to the NEET exam syllabus.The Test: Aerobic Respiration MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Aerobic Respiration below.
Solutions of Test: Aerobic Respiration questions in English are available as part of our Biology Class 11 for NEET & Test: Aerobic Respiration solutions in Hindi for Biology Class 11 course. Download more important topics, notes, lectures and mock test series for NEET Exam by signing up for free. Attempt Test: Aerobic Respiration | 40 questions in 40 minutes | Mock test for NEET preparation | Free important questions MCQ to study Biology Class 11 for NEET Exam | Download free PDF with solutions
Test: Aerobic Respiration - Question 1

Select the wrong statement with respect to glycolysis.

Detailed Solution for Test: Aerobic Respiration - Question 1

Glucose is phosphorylated to glucose-6-phosphate by ATP in the presence of enzyme hexokinase or glucokinase and Mg2+.

Test: Aerobic Respiration - Question 2

Which of the following steps during glycolysis is associated with utilization of ATP?

Detailed Solution for Test: Aerobic Respiration - Question 2

In the initial phase (energy spendling phase) of glycolysis, the hexoses (i.e., glucose and fructose) ar phosphorylated in a reaction that uses ATP at two steps : First in the conversion of glucose into glucose-6-phosphate and second in the conversion of fructose-6-phophaste to fructose-1,6-biphosphate.
These reactions are catalysed by the hexokinase and phospho-fructokinase respectively

1 Crore+ students have signed up on EduRev. Have you? Download the App
Test: Aerobic Respiration - Question 3

Which of the following conversions involve ATP synthesis during glycolysis?

Detailed Solution for Test: Aerobic Respiration - Question 3

In the energy conserving phase of glycolysis, the conversion of BPGA to PGA is catalyzed by phosphoglycerate kinase. The phosphate on carbon 1 is transferred to a molecule of ADP, yielding ATP and 3-phosphoglycerate. This type of ATP synthesis, traditionally referred to as substrate-level phosphorylation, involves the direct transfer of a phosphate group from a substrate molecule to ADP, to form ATP.

Test: Aerobic Respiration - Question 4

The flow chart given below shows the steps in glycolysis. Select the option that correctly fills in the missing steps A, B, C, and D.


Detailed Solution for Test: Aerobic Respiration - Question 4

Glycolysis is a biochemical reaction in which one glucose molecule into 2 pyruvate molecules. 
As shown in the diagram showing the step-by-step biochemical reaction in glycolysis. According to this A - Fructose-6-phosphate, B - Fructose-1,6-Biphosphate; C- 3-PGAL; D - 1,3-biphosphoglyceric acid.

Test: Aerobic Respiration - Question 5

Fate of pyruvic acid during aerobic respiration is

Detailed Solution for Test: Aerobic Respiration - Question 5

During aerobic respiration, pyruvic acid which is formed during glycolysis enters mitochondrial matrix. It undergoes oxidative decarboxylation to produce CO2 and NADH. The product combines with sulphur containing coenzyme A to form acetyl CoA. This reaction is catalysed by an enzyme complex pyruvate dehydrogenase. This step is called link reaction or gateway step as it links glycolysis with Krebs' cycle.

Test: Aerobic Respiration - Question 6

Substrate level phosphorylation occurs during which step of Krebs' cycle?

Detailed Solution for Test: Aerobic Respiration - Question 6

During Krebs' or citric acid cycle, succinyl-CoA is acted upon by enzyme succinyl-CoA synthetase to form succinate (a 4C compound). The reaction releases sufficient energy to form ATP (in plants) or GTP (in animals) by substrate-level phosphorylation. GTP can form ATP through a coupled reaction.

GTP/ATP

Test: Aerobic Respiration - Question 7

The first 5C dicarboxylic acid in Krebs' cycle which is used in nitrogen metabolism is

Detailed Solution for Test: Aerobic Respiration - Question 7

The first 5 carbon dicarboxylic acid in Krebs' cycle is α ketoglutaric acid. The α-ketoglutarate that accumulates when α-ketoglutarate dehydrogenase is inhibited can be used in nitrogen metabolism as a precursor for several amino acids and the purine bases.

α-ketoglutarate → Glutamate Other amino acids → Purines.

α-ketoglutarate of Krebs' cycle produces an important amino acid called glutamate on amination.

Test: Aerobic Respiration - Question 8

Kreb’s cycle is also called metabolic sink as it is a common pathway for:

Detailed Solution for Test: Aerobic Respiration - Question 8

Krebs' cycle also known as TCA cycle or citric acid cycle, is a common pathway of oxidative breakdown of carbohydrates, fatty acids and amino acids. Amino acids enter the Krebs' cycle directly as glutamate (for α-Ketoglutarate) and aspartate (for oxaloacetate) after their deamination. Fats produce fatty acids and glycerol. Glycerol is phosphorylated and oxidized to form glyceraldehyde 3-phosphate. Fatty acids undergo β-oxidation to produce acetyl CoA. Acetyl CoA enters Krebs' cycle.

Test: Aerobic Respiration - Question 9

When two molecules of acetyl CoA enter the TCA cycle, net gain at the end of the cycle is

Detailed Solution for Test: Aerobic Respiration - Question 9

Krebs' cycle produces 2 GTP (or 2 ATP) through substrate level phosphorylation. Six molecules of NADH2 and 2 molecules of FADH2 for every two molecules of Acetyl CoA oxidised by it.

Test: Aerobic Respiration - Question 10

Which is true about the end products of glycolysis?

Detailed Solution for Test: Aerobic Respiration - Question 10

In glycolysis, two molecules of ATP are consumed during two phosphorylation reactions to form fructose 1, 6-biphosphate. In return four molecules of ATP are produced by substrate level phosphorylation (conversion of 1, 3-biphosphoglycerate to 3-phosphoglycerate and phosphoenol pyruvate to pyruvate). Two molecules of NADH2 are formed at the time of oxidation of glyceraldehyde 3-phosphate to 1, 3-biphosphoglycerate. The net reaction of glycolysis is as follows :
Glucose + 2NAD+ + 2ADP + 2H3PO→ 2 Pyruvate + 2NADH + 2H+ + 2ATP
Each NADH is equivalent to 2 ATP, so the net gain in glycolysis is 8 ATP.

Test: Aerobic Respiration - Question 11

Seeds respire in the

Detailed Solution for Test: Aerobic Respiration - Question 11

Oxygen is required by the germinating seed during aerobic respiration, it is the main source of energy for the seedlings until the formation of leaves. Oxygen is an atmospheric gas that is found in soil pore spaces. If a seed is buried too deeply within the soil or’the soil is water logged, the seed can be oxygen starved. If germinating seeds do not get air for respiration, they are still capable of respiration in absence of oxygen. Anaerobic respiration takes place in the seeds in the absence of free oxygen.

Test: Aerobic Respiration - Question 12

The respiration in germinating seeds produces energy, which can be detected in the form of

Detailed Solution for Test: Aerobic Respiration - Question 12

In germinating seeds, imbibition takes place. Their kinetic energy is released in the form of heat (heat of wetting).

Test: Aerobic Respiration - Question 13

Site of Krebs' cycle in mitochondria is

Detailed Solution for Test: Aerobic Respiration - Question 13

Krebs cycle(or TCA cycle) takes place in mitochondrial matrix. A 2-carbon acetyl CoA acts as substrate entrant for Krebs cycle and 4-carbon oxaloacetate acts as acceptor molecule.

Test: Aerobic Respiration - Question 14

In Krebs cycle the FAD participates as electron acceptor during the conversion of

Detailed Solution for Test: Aerobic Respiration - Question 14

Succinate undergoes dehydrogenation to form fumarate with the help of a membrane based enzyme succinate dehydrogenase. FADH2 (reduced flavin adenine dinucleotide) is produced.

Test: Aerobic Respiration - Question 15

Krebs' cycle starts with the formation of a six carbon compound by reaction between

Detailed Solution for Test: Aerobic Respiration - Question 15

Acetyl CoA (2-carbon compound) combines with oxaloacetate (4-carbon compound) in the presence of condensing enzyme citrate synthase to form a tricarboxylic 6-carbon compound called citric acid. It is the first product of Krebs' cycle. CoA is liberated.

Test: Aerobic Respiration - Question 16

Alternate name of Krebs' cycle is

Detailed Solution for Test: Aerobic Respiration - Question 16

Krebs' cycle was discovered by Sir Hans Krebs in 1937 (Nobel Prize in 1953) and thus is named so. Krebs' cycle is also called as citric acid cycle or tricarboxylic acid cycle (TCA cycle) after the name of its first product. Citric acid is a tricarboxylic 6-carbon compound.

Test: Aerobic Respiration - Question 17

Read the given statements and select the correct option.
Statement 1:
Glycolysis occurs in mitochondrial matrix.
Statement 2: Kerbs' cycle occurs on cristae of mitochondria.

Detailed Solution for Test: Aerobic Respiration - Question 17

Glycolysis occurs in cell cytoplasm and Krebs' cycle occurs in mitochondrial matrix.

Test: Aerobic Respiration - Question 18

Categories the given equations under respective phases and select the correct option.

Detailed Solution for Test: Aerobic Respiration - Question 18

Glycolysis, also known as EMP (Embden, Meyerhof, Parnas) pathway, is the breakdown of glucose to pyruvic acid in the absence of oxygen. It occurs in the cytosol of the cell and completes in 10 steps. Net reaction of glycolysis is:
2ATP + 2H+

A molecule of pyruvic acid that enters a mitochondrion is completely oxidized to form 3 carbon dioxide in one pre-Krebs' cycle decarboxylation and two Krebs' cycle decarboxylations. Net reaction of Krebs' cycle is as:
Pyruvicacid + 4NAD+ + FAD+ + 2H2​O + ADP + Pl  → 3CO2​ + 4NADH4H+ + FADH2 ​+ ATP

Test: Aerobic Respiration - Question 19

Respiratory pathway is

Detailed Solution for Test: Aerobic Respiration - Question 19

The same respiratory process which acts as catabolic pathway for respiratory substrates also acts as anabolic pathway for the synthesis of various intermediary metabolic products and secondary metabolites. The respiratory pathway, therefore acts both as catabolic as well as anabolic pathway. Thus, it is better to call it amphibolic pathway rather than a catabolic pathway alone.

Test: Aerobic Respiration - Question 20

Which of the following steps of respiration is amphibolic?

Detailed Solution for Test: Aerobic Respiration - Question 20

TCA or Krebs' cycle is amphibolic (both catabolic and anabolic) because it provides a number of intermediates for anabolic pathways.

Test: Aerobic Respiration - Question 21

Read the given statements and select the correct option.
Statement 1: 
Mitochondria is known as power house of cell.
Statement 2: ATP synthesis occurs in mitochondria.

Detailed Solution for Test: Aerobic Respiration - Question 21

Mitochondria are cell organelles of eukaryotes. These are site of aerobic respiration, where Krebs' cycle occurs in matrix, while ETS and oxidative phosphorylation enzymes are located in inner membrane. They are called power houses of cell because they produce energy in the form of ATP. They are the major centres of release of energy in the aerobic respiration.

Test: Aerobic Respiration - Question 22

Refer to the given figure and select the correct option for A,B,C and D.

Detailed Solution for Test: Aerobic Respiration - Question 22

In the given image a represents fat, b represent proteins, c represents 3 phosphoglyceraldehydes while d- acetyl CoA.
So, the correct option is 'A- Fats; B- Proteins; C- 3-PGAL; D- AcetylCoA'.

Test: Aerobic Respiration - Question 23

All enzymes of TCA cycle are located in the mitochondrial matrix except one which is located in inner-mitochondrial membranes in eukaryotes and in cytosol in prokaryotes. This enzyme is

Detailed Solution for Test: Aerobic Respiration - Question 23

Succinate dehydrogenase is the only enzyme of Krebs' cycle which is located in inner mitochondrial membrane in eukaryotes and in cytosol in prokaryotes while all other enzymes of this cycle are located in the mitochondrial matrix.

Test: Aerobic Respiration - Question 24

Which of the following cellular metabolic processes can occur both in the presence or absence of O2?

Detailed Solution for Test: Aerobic Respiration - Question 24

Glycolysis is an oxidative process in which one molecule of glucose partially oxidised into two molecules of pyruvate on a series of enzyme catalysed reactions. Glycolysis, the major pathway for glucose metabolism, occurs in the cytosol of all cells. It is a unique pathway that occurs aerobically as well as anaerobically and does not involve molecular oxygen.

Test: Aerobic Respiration - Question 25

Consider the first reaction of TCA cycle.

What is true about compound A?

Detailed Solution for Test: Aerobic Respiration - Question 25

The TCA cycle starts with the condensation of acetyl group with oxaloacetic acid and water to yield citric acid. It is a tricarboxylic 6-carbon compound and undergoes reorganisation in the presence of iron containing enzyme aconitase first forming cis aconitate and releasing water.

Test: Aerobic Respiration - Question 26

The end products of respiration in plants are

Detailed Solution for Test: Aerobic Respiration - Question 26

The process of respiration is expressed as:
Glucose + Oxygen → Carbon Dioxide + Water (+ Energy)

Test: Aerobic Respiration - Question 27

Which of the following is a 4-carbon compound?

Detailed Solution for Test: Aerobic Respiration - Question 27

Oxaloacetic acid is a 4C compound, HO2CCH2COCO2H, that plays an integral role in the Krebs cycle. The anion, oxaloacetate, reacts with the acetyl group, from acetyl coenzyme A to form citrate.

Test: Aerobic Respiration - Question 28

Select the wrong statement

Detailed Solution for Test: Aerobic Respiration - Question 28

Cyanide is an inhibitor of complex IV (in ETS) and other heme-containing enzymes of mitochondria. Thus, cyanide blocks ATP production in the cells.

Test: Aerobic Respiration - Question 29

During complete metabolism of glucose, the number of ATP formed is

Detailed Solution for Test: Aerobic Respiration - Question 29

There is a gain of 2 ATP molecules during glycolysis and 2 ATP(GTP) molecules during double Krebs cycle. A total of 10 NADH2​ molecules are formed in aerobic respiration. Thus, the net gain from complete oxidation of a molecule of glucose in muscle and nerve cells is 36 ATP molecules (10 NADH2 ​= 30ATP, 2FADH2​ = 4ATP, four formed by substrate-level phosphorylation in glycolysis and Krebs' cycle and two consumed in transport of the NADH2​ molecules into mitochondria). In aerobic prokaryotes, heart, liver and kidneys, 38 ATP molecules are produced per glucose molecule oxidised. passage of ATP molecules from inside of mitochondria to the cytoplasm is through facilitated diffusion.

Thus, there is a net gain of 36 or 38 ATP molecules depending upon the type of aerobic respiration.

[Note: 1NADH2​ = 3ATP and 1FADH2​ = 2ATP].

Test: Aerobic Respiration - Question 30

Read the given statements and select the correct option.
Statement 1:
During photophosphorylation (of photosynthesis), light energy is utilised for the production of a proton gradient during ATP synthesis.
Statement 2: In respiration, the energy of oxidation-reduction is utilised for the phosphorylation and thus the process is called oxidative phosphorylation.

Detailed Solution for Test: Aerobic Respiration - Question 30

Photophosphorylation occurs in the grana and requires the direct sunlight energy to make energy-carrier molecules that are used in the dark reaction. The light energy is trapped by chlorophyll to make ATP and NADPH. Oxidative phosphorylation is the synthesis of energy-rich ATP molecules with the help of energy liberated during oxidation of reduced co-enzymes (NADH, FADH2​) produced in respiration.

Test: Aerobic Respiration - Question 31

Electron transport chain (ETC) is a set of ______ electron carriers present in a specific sequence along ______ mitochondrial membrane.

Detailed Solution for Test: Aerobic Respiration - Question 31

In electron transport chain, there are 7 electron acceptors, which are as follows Co − Q → Cyt b → Cyt c1 → Cyt c → Cyt a → Cyt a3 → O2. Oxygen is the ultimate electron acceptor. These electron acceptors are present in a specific sequence along inner mitochondrial membrane.

Test: Aerobic Respiration - Question 32

During the process of aerobic respiration, (i) gets oxidised and its electrons get transferred to the electron transport chain while in photosynthesis, (ii) gets oxidised to transfer molecules to the electron transport chain.

Detailed Solution for Test: Aerobic Respiration - Question 32

The oxidative breakdown of respiratory substrates with the help of atmospheric O2 is known as aerobic respiration. It involves complete breakdown of substrates into CO2 and water, releasing energy. For example, the simple chemical equation for aerobic breakdown of glucose is

C6H12O6 + 6O2 → 6CO2 + 6H2O + 2870kJ/686KCal

While during photosynthesis chlorophyll a gets oxidised to transfer molecules to the electron transport chain.

Test: Aerobic Respiration - Question 33

Select the option that correctly fills the blanks in the following statements.
A. Glucose has (i) carbon atoms, pyruvic acid has (ii) carbon atoms and the acetyl group has (iii) carbon atoms.
B. Electrons enter the electron transport system as parts of hydrogen atoms attached to (i) and (ii).

Detailed Solution for Test: Aerobic Respiration - Question 33

A. i- Glucose molecule has 6 carbon atoms. It is a monosaccharide It is produced during the Calvin cycle.

ii. Pyruvic acid has 3 carbon atoms. It produces during the glycolytic breakdown of glucose into 2 pyruvic acids.

iii Pyruvic acid generated in the glycolysis enters in the mitochondrial matrix, undergoes oxidative decarboxylation and forms 2 carbon acetyl Co = A  which enters in Kreb's cycle.

B. The metabolic pathway through which the electron passes from one carrier to another is called an electron transport system. The steps in the respiratory process are to release and utilise the energy stored in NADH + H+ and FADH2​. 

Test: Aerobic Respiration - Question 34

How many points are there in the TCA cycle where NAD+ is reduced?

Detailed Solution for Test: Aerobic Respiration - Question 34

There are three points in the TCA cycle where NAD+ is reduced to NADH + H+ and one point where FAD+ is reduced to FADH2. In a coupled reaction GTP is converted to GDP with the simultaneous synthesis of ATP from ADP.

Test: Aerobic Respiration - Question 35

Select the correct statements.
(i) Between temperature range 0−25C, rate of respiration doubles for every 10C rise in temperature.
(ii) Cytochromes are iron-porphyrin compounds.
(iii) Respiratory rate of wounded or injured plant parts generally decreases.

Detailed Solution for Test: Aerobic Respiration - Question 35

Wounding or injuring an organ of a plant increases the rate of respiration. It is probably due to the formation of growth hormone, traumatic acid, which increases the meristematic activity, resulting in callus formation.

Test: Aerobic Respiration - Question 36

Which of these are respiratory poisons or inhibitors of ETC?

Detailed Solution for Test: Aerobic Respiration - Question 36

Site-specific inhibitors of electron transport prevent the passage of electrons by binding to a component of the chain, blocking the Oxidation/reduction reaction.

Antimycin A, an antibiotic, blocks electron transport at the level of the CoQH2​-cytochrome c-reductase (Complex III). Cyanide, azide, and Co bind with cytochrome oxidase complex and inhibit the terminal transfer of electrons to oxygen.

Test: Aerobic Respiration - Question 37

How many ATP molecules will be generated in a plant system during the complete oxidation of 40 molecules of glucose?

Detailed Solution for Test: Aerobic Respiration - Question 37

36 ATP molecules are produced during complete oxidation of one molecule of glucose.
So, 40 molecules of glucose will produce (36×40) ATP = 1440 ATP.

Test: Aerobic Respiration - Question 38

The end product of glycolysis is

Detailed Solution for Test: Aerobic Respiration - Question 38
  • Glycolysis is defined as a sequence of reactions that convert glucose into pyruvate or lactate with the production of ATP (adenosine triphosphate).
  • Pyruvic acid is the end product of glycolysis.
  • Two molecules of pyruvic acid are generated by the partial oxidation of one glucose molecule.
  • The end product of glycolysis is the three-carbon pyruvic acid produced in the cytosol.
Test: Aerobic Respiration - Question 39

In the electron transport system present in the inner mitochondrial membrane, complexes I and IV are respectively:

Detailed Solution for Test: Aerobic Respiration - Question 39

Four major respiratory enzyme complexes of electron transport chain are located in the inner mitochondrial membrane :

Complex I (NADH dehydrogenase), complex II (succinate dehydrogenase), complex III (cytochrome be,) and cytochrome IV (cytochrome c oxidase)

There is a fifth complex called ATP synthase which is involved in ATP synthesis.

Test: Aerobic Respiration - Question 40

Match column I with column II and select the correct option from the codes given below.

Detailed Solution for Test: Aerobic Respiration - Question 40

Common pathway of aerobic respiration consists of three steps-
(I) Glycolysis (II) TCA/Krebs' cycle and (III) ETS
It occurs in both prokaryotes and in eukaryotes.

190 videos|390 docs|210 tests
Information about Test: Aerobic Respiration Page
In this test you can find the Exam questions for Test: Aerobic Respiration solved & explained in the simplest way possible. Besides giving Questions and answers for Test: Aerobic Respiration, EduRev gives you an ample number of Online tests for practice

Up next

190 videos|390 docs|210 tests
Download as PDF

Up next