NEET Biology Respiration MCQs Set E

Question: Synthetic processes of a cell comes under

• a) Anabolism
• b) Metabolism
• c) Catabolism
• d) Growth

Answer: Anabolism

Question: Degradation processes of a cell are referred under

• a) Catabolism
• b) Anabolism
• c) Metabolism
• d) Growth

Answer: Catabolism

Question: Pyruvic acid is

• a) CH₃COCOOH
• b) CH₃CHO
• c) CH₃CHOH COOH
• d) None of the above

Answer: CH₃COCOOH

Question: CH₃CHO is

• a) Acetaldehyde
• b) Pyruvic acid
• c) Ethanol
• d) Lactic acid

Answer: Acetaldehyde

Question: CH₃CH₂OH represents

• a) Ethanol
• b) Acetic acid
• c) Pyruvic add
• d) Lactic acid

Answer: Ethanol

Question: Respiratory substances are

• a) Nutritive substances present in food
• b) Excretory substances
• c) Substances available from air
• d) Mineral elements

Answer: Nutritive substances present in food

Question: For aerobic respiration, it is essential

• a) O₂
• b) CO₂
• c) CO
• d) None of the above

Answer: O₂

Question: Acetaldehyde is formed from pyruvic acid, if it is removed

• a) CO₂
• b) 2 OH
• c) CHO
• d) H₂

Answer: CO₂

Question: Respiration type occurring in human red blood corpuscles is

• a) Anaerobic
• b) Aerobic
• c) Fermentation
• d) None of the above

Answer: Anaerobic

Question: Yeast

• a) Respires aerobically, if it gets O_2, otherwise perform alcoholic fermentation
• b) Respires an aerobically, due to lack of mitochondria
• c) Respires aerobically
• d) Can perform alcoholic fermentation

Answer: Respires aerobically, if it gets O_2, otherwise perform alcoholic fermentation

Question: The end product of glycolysis of a glucose molecule is

• a) 2 Pyruvic acid, NADH₂ and 2 ATP
• b) Pyruvic acid, 2H⁺, 2e and 4 ATP
• c) Pyruvic acid, NADH₂ and ADP
• d) 2 Pyruvic acid, 2NADH₂ and ATP

Answer: 2 Pyruvic acid, NADH₂ and 2 ATP

Question: The enzyme required to form acetaldehyde from pyruvic acid is

• a) Pyruvic acid decarboxylase
• b) Alcohol dehydrogenase
• c) Oxidase
• d) Hexokinase

Answer: Pyruvic acid decarboxylase

Question: Phosphorylation in general is ________

• a) Combination of phosphoric acid with a chemical
• b) Formation of PGA by adding P to glycerate
• c) Addition of ATP to glucose
• d) Synthesis ATP from ADP and P

Answer: Combination of phosphoric acid with a chemical

Question: Fructose 1,6 biphosphate splits into

• a) PGAL and DHAP
• b) PGAL and PGA
• c) PGAL and BPGA
• d) PGA and BPGA.

Answer: PGAL and DHAP

Question: Oxidative phosphorylation occurs in

• a) Cristae
• b) Endoplasmic reticulum
• c) Mitochondrial matrix
• d) Cytosol

Answer: Cristae

Question: Malic acid is formed from fumaric acid

• a) By addition of H₂O
• b) By removal of H₂O
• c) By removal of CO₂
• d) By addition of CO₂

Answer: By addition of H₂O

Question: If CO₂ and 2H are removed from pyruvic acid, it is formed

• a) Acetate
• b) Co-A
• c) Citric acid
• d) Acetyl co-enzyme A

Answer: Acetate

Question: It is by-product of Kreb’s cycle

• a) Citric acid
• b) Acetyl co-enzyme
• c) Acetate.
• d) Oxaloacetic acid

Answer: Citric acid

Question: Respiratory quotient and compensation point are

• a) Not related
• b) Inverse to each other
• c) Same
• d) Applicable to.all organisms

Answer: Not related

Question: The site of occurrance of all reactions of PPP is

• a) Cytosol
• b) Mitochondrial matrix
• c) Cristae
• d) Thylakoid matrix

Question: If RQ is 0.7, the substance needs

• a) More O₂ for respiration
• b) Less O₂ for respiration
• c) O₂ is not used for its respiration
• d) The substance has more oxygen in its constitution

Answer: More O₂ for respiration

Question: RQ = l, is

• a) The amount of O_2, consumed and CO₂ released are the same
• b) The multiplication O₂ consumed O₂ and released CQ₂
• c) One CO₂ molecule more released than O₂ molecule consumed
• d) One O₂ molecule more consumed than CO₂ molecules released

Answer: The amount of O_2, consumed and CO₂ released are the same

Question: The process occurring during Kreb’s cycle is

• a) Decarboxylation, dehydrogenation and phosphorylation
• b) Decarboxylation and dehydrogenation
• c) Decarboxylation and phosphorylation
• d) Dehydrogenation and phosphorylation

Answer: Decarboxylation, dehydrogenation and phosphorylation

Question: During glycolysis water is released from

• a) 2, Phospoglyceric acid
• b) Phosphoenol pyruvic acid
• c) Biphosphoglyceric acid
• d) Phosphoglyceraldehyde

Answer: 2, Phospoglyceric acid

Question: When human muscle contracts

• a) Anaerobic respiration occurs, if supply of oxygen is insufficient
• b) Respiration does not occur
• c) Anaerobic respiration never occurs
• d) Always anaerobic respiration occurs.

Answer: Anaerobic respiration occurs, if supply of oxygen is insufficient

Question: The correct sequence of the three processes of aerobic respiration is

• a) Glycolysis, Kreb’s cycle, oxidative phosphorylation.
• b) Glycolysis, oxidative phosphorylation and Kreb’s cycle
• c) Kreb’s cycle, glycolysis and oxidative phosphorylation
• d) oxidative phosphorylation, Kreb’s cycle, glycolysis

Answer: Glycolysis, Kreb’s cycle, oxidative phosphorylation.

Question: During PPP, RuBP is formed in

• a) Cytosol
• b) Mitochondria
• c) Stroma
• d) Chloroplas

Answer: Cytosol

Question: The number of ATP molecules formed in oxidative phosphorylation of one glucose molecule

• a) 34
• b) 34
• c) 14
• d) 6

Answer: 34

Question: The number of ATP molecules formed in oxidative phosphorylation of 1 pyruvic acid

• a) 14
• b) 28
• c) 34
• d) 6

Answer: 14

Question: How much energy spent in transport of one pyruvic acid to mitochondrion ?

• a) Energy of 1 ATP
• b) Not certain
• c) No energy
• d) Energy of 2 ATP

Answer: Energy of 1 ATP

Question: In anaerobic respiration in plants

• a) Carbon dioxide is released
• b) Oxygen is absorbed
• c) Oxygen is released
• d) Carbon dioxide is absorbed

Answer: Carbon dioxide is released

Question: Krebs cycle takes place in

• a) Mitochondria
• b) Dictyosomes
• c) Chloroplasts.
• d) Vesicles of E.R

Answer: Mitochondria

Question: By ETS, ATP-synthesis occurs on the

• a) Inner membrane of mitochondrion
• b) None of the above
• c) Matrix
• d) Outer membrane of mitochondrion

Answer: Inner membrane of mitochondrion

Question: Energy currency (reservoir) of the cells is

• a) ATP
• b) AMP
• c) RNA
• d) DNA

Answer: ATP

Question: Complete oxidation of glucose into pyruvic acid with several intermediate steps is known as

• a) Glycolysis
• b) HMS-pathway
• c) Krebs cycle
• d) TCA-pathway

Answer: Glycolysis

Question: When a molecule of pyruvic acid is subjected to anaerobic oxidation and forms lactic acid, there is

• a) Loss of 3 ATP molecules
• b) Loss of 6 ATP molecules
• c) Gain of 2 ATP molecules
• d) Gain of 4 ATP molecules

Answer: Loss of 3 ATP molecules

Question: Conversion of pyruvic acid into ethyl alcohol is facilitated by the enzyme

• a) Decarboxylase and dehydrogenase
• b) Decarboxylase
• c) Dehydrogenase
• d) Phosphotase

Answer: Decarboxylase and dehydrogenase

Question: RQ for fatty substance/fat is

• a) Less than one
• b) Infinity
• c) Greater than one
• d) Zero

Answer: Less than one

Question: RQ for glucose carbohydrate is

• a) 1
• b) 0.5
• c) 2
• d) 0.05

Answer: 1

Question: An indispensable role in energy metabolism is played by

• a) Phosphorus
• b) Calcium
• c) Sodium
• d) Lithium

Answer: Phosphorus

Question: Instantaneous source of energy is

• a) Glucose
• b) Fats
• c) Proteins
• d) Amino acid.

Answer: Glucose

Question: ATP equivalents produced during oxidation of succinate to fumarate for one glucose molecule is/are

• a) 2
• b) 3
• c) 4
• d) 1

Answer: 2

Question: Which of the following process is used in the conversion of pyruvate to acetyl CoA ?

• a) Oxidative decarboxylation
• b) Oxidative dehydration
• c) Oxidative dehydrogenation
• d) Oxidative phosphorylation

Answer: Oxidative decarboxylation

Question: During ATP synthesis electrons pass through

• a) Cytochromes
• b) H₂O
• c) CO₂
• d) O₂

Answer: Cytochromes

Question: Net gain of ATP in glycolysis

• a) 8
• b) 4
• c) 2
• d) 6

Answer: 8

Question: The universal hydrogen acceptor is ‘

• a) NAD
• b) ATP
• c) CoA
• d) FMN

Answer: NAD

Question: Both respiration and photosynthesis require

• a) Cytochromes
• b) Glucose
• c) Chlorophyll
• d) Sunlight

Answer: Cytochromes

Question: In an organism utilising carbohydrates as its source of energy anaerobically, the R.Q. is likely

• a) Infinity.
• b) l.0
• c) 0.9
• d) 0.7

Answer: Infinity.

Question: In plants energy is produced during the process of

• a) Respiration
• b) Water absorption
• c) Transpiration
• d) Photosynthesis

Answer: Respiration

Question: In respiration pyruvic acid is

• a) Broken down into a two carbon fragment and CO₂
• b) A result of protlipid breakdown
• c) One of the products of Krebs cycle
• d) Formed only when oxygen is available

Answer: Broken down into a two carbon fragment and CO₂

Question: Maximum number of ATP is synthcsised during oxidation of

• a) Palmitic acid
• b) Glucose
• c) Malic acid
• d) None of the above

Answer: Palmitic acid

Question: NADP⁺ is reduced to NADPH in

• a) HMP
• b) Calvin Cycle
• c) Glycolysis
• d) EMP

Answer: HMP

Question: Incomplete breakdown of sugars in anaerobic respiration forms

• a) Alcohol and CO₂
• b) Water and CO₂
• c) Glucose and CO₂
• d) Fructose and water

Answer: Alcohol and CO₂

Question: Which of the following is the source of respiration ?

• a) Stored food
• b) ATP
• c) DNA
• d) RNA

Answer: Stored food

Question: Raw material of respiration is

• a) Glucose + O₂
• b) Glucose and fructose
• c) Glucose and sucrose
• d) None of the above

Answer: Glucose + O₂

Question: Respiration is found in

• a) In all living cells both in light and dark
• b) In all living cells in light
• c) All living cells in dark
• d) Only in nongreen cells both in light and dark

Answer: In all living cells both in light and dark

Question: Anaerobic respiration is

• a) Intra-molecular respiration
• b) Molecular respiration
• c) Extramolecular respiration
• d) Inter-molecular respiration

Answer: Intra-molecular respiration

Question: Total gain of energy in anaerobic respiration from one glucose molecule is

• a) Two ATP
• b) One ATP
• c) Four ATP
• d) Three ATP

Answer: Two ATP

Question: Final electron acceptor in respiration is

• a) Oxygen
• b) Hydrogen
• c) Cytochromes
• d) Dehydrogenases

Answer: Oxygen

Question: Oxidative phosphorylation is found in

• a) Mitochondria
• b) Peroxisomes
• c) Leucoplasts
• d) Chloroplasts

Answer: Mitochondria