NEET Biology Respiration MCQs Set 03

Question: In Opunita and other succulents, night time R.Q. is

• a) Zero
• b) Less than one
• c) More than one
• d) One

Answer: Zero

Question: RQ of protein rich pulses is

• a) Less than one
• b) More than unity
• c) Infinity
• d) Unity

Answer: Less than one

Question: Oxidation of a molecule of acetyl CoA produces

• a) 12 ATP
• b) 15 ATP
• c) 6 ATP
• d) 19 ATP

Answer: 12 ATP

Question: Maximum amount of energy/ATP is liberated on oxidation of

• a) Fats
• b) Proteins
• c) Starch
• d) Vitamins

Answer: Fats

Question: R.Q. is ratio of

• a) CO₂ produced to O₂ consumed
• b) CO2 produced to O2 consumed
• c) CO₂ produced to substrate consumed
• d) Oxygen consumed to CO₂ produced

Answer: CO₂ produced to O₂ consumed

Question: Connecting link between glycolysis and Krebs cycle is/before entering Krebs cycle pyruvate is changed to

• a) Acetyl CoA
• b) Pyruvate
• c) PEP
• d) Oxaloacetate

Answer: Acetyl CoA

Question: Apparatus to measure rate of respiration and R.Q. is

• a) Respirometer
• b) Manometer
• c) Potometer
• d) Auxanometer

Answer: Respirometer

Question: Terminal cytochrome of respiratory chain which donates electrons to oxygen is

• a) Cyt a₃
• b) Cyt a
• c) Cyt c
• d) Cyt b

Answer: Cyt a₃

Question: R.Q. is maximum when respiratory substrate is

• a) Malic acid.
• b) Protein
• c) Fat
• d) Glucose

Answer: Malic acid.

Question: End product of citric add/Krebs cycle is

• a) CO₂ + H₂O
• b) Pyruvic acid
• c) Lactic acid
• d) Citric acid

Answer: CO₂ + H₂O

Question: Krebs cycle is

• a) Complete oxidation of acetyl CoA without electron transport
• b) Complete reduction of acetyl CoA to carbon dioxide and water
• c) Oxidation of acetyl CoA to carbon dioxide and water involving electron transport
• d) Oxidation of glucose to alcohol and water

Answer: Complete oxidation of acetyl CoA without electron transport

Question: Most of the biological energy is supplied by mitochondria through

• a) Oxidising TCA substrates
• b) Breaking of sugars
• c) Breaking of proteins
• d) None of the above

Answer: Oxidising TCA substrates

Question: Which one is a product of glycolysis, besides 2 ATP ?

• a) NADH
• b) NAD
• c) NAD
• d) FAD

Answer: NADH

Question: The site of Krebs cycle in bacteria is

• a) Plasma membrane
• b) Cytoplasm
• c) Ribosomes
• d) Nucleoid

Answer: Plasma membrane

Question: Which is the product of aerobic respiration?

• a) Malic acid
• b) Ethyl alcohol
• c) Lactic acid
• d) Pyruvic acid

Answer: Malic acid

Question: Which one can respire in the absence of oxygen ?

• a) Seeds
• b) Leaves
• c) Stem
• d) Root

Answer: Seeds

Question: Lactic acid fermentation does not produce

• a) CO₂ and NADH
• b) CO₂
• c) ATP
• d) NADH

Answer: CO₂ and NADH

Question: Electron transport system of mitochondria is located in

• a) Inner membrane
• b) Outer membrane
• c) Inter-cristal space
• d) Outer chamber.

Answer: Inner membrane

Question: In bacteria the site for respiration is

• a) Mesosome
• b) Episome
• c) Plasmid
• d) Cytoplasm

Answer: Mesosome

Question: Which is wrong about cytochrome P-450

• a) Is a coloured cell
• b) Plays an important role in metabolism
• c) Is an enzyme
• d) Contains iron

Answer: Is a coloured cell

Question: Production of alcohol by Yeast fermentation is ____ process

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

Answer: Anaerobic

Question: In glycolysis, enzyme enolasc produces

• a) Phosphoenol pyruvate
• b) Pyruvate
• c) Phosphoglyceraldehyde
• d) Phosphoglyceric acid

Answer: Phosphoenol pyruvate

Question: Oxygen is reduced to water in

• a) Electron transport
• b) Fermentation
• c) Calvin cycle
• d) Krebs cycle

Answer: Electron transport

Question: Cytochrome is

• a) Fe-containing porphyrin pigment
• b) Glycoprotein
• c) Lipid
• d) Metalloflavoprotein

Answer: Fe-containing porphyrin pigment

More Questions........................................

Question: In respiration

• a) 2 PGAL are formed in glycolysis and none in Krebs cycle
• b) 6 PGAL in glycolysis, 3 PGAL in Krebs cycle
• c) 8 PGAL in glycolysis, 3 PGAL in Krebs cycle
• d) PGAL formation does not occur in respiration.

Answer: 2 PGAL are formed in glycolysis and none in Krebs cycle

Question: Glycolysis takes place in

• a) All cells
• b) Muscle cells
• c) Only eukaryotic cells
• d) Nerve cells

Answer: All cells

Question: Which is rich in energy

• a) ATP
• b) FAD
• c) Mitochondria
• d) None of the above

Answer: ATP

Question: Which one requires oxygen

• a) None of the above
• b) EMP pathway
• c) Fermentation
• d) Pentose phosphate pathway

Answer: None of the above

Question: Mechanism of aerobic respiration was discovered by

• a) Krebs
• b) Pasteur
• c) Hatch and Slack
• d) Calvin

Answer: Krebs

Question: Mechanism of aerobic respiration was discovered by

• a) Krebs
• b) Pasteur
• c) Hatch and Slack
• d) Calvin

Answer: Krebs

Question: Which of the following is the first step of glycolysis

• a) Phosphorylation of glucose
• b) Dehydrogenation of glucose
• c) Conversion of glucose to fructose
• d) Breakdown of glucose

Answer: Phosphorylation of glucose

Question: How many ATP molecules are released when one molecule of glucose is oxidised in our liver cells

• a) 38
• b) 36
• c) 2
• d) 8

Answer: 38

Question: RQ of anaerobic respiration is

• a) 0
• b) 1
• c) Both
• d) None of the above

Answer: 0

Question: Which one is an important intermediate formed in all types of respiration

• a) Pyruvic acid
• b) Tricarboxylic acid
• c) Oxaloacetate
• d) Acetyl CoA

Answer: Pyruvic acid

Question: RQ is less than one, if the respiratory substrate is

• a) Fats and proteins
• b) Sucrose
• c) Glucose
• d) Organic acids

Answer: Fats and proteins

Question: Enzyme used in conversion of glucose to glucose 6-phosphate is

• a) Hexokinase
• b) Isomerase
• c) Phosphokinase
• d) Phosphohexokinase

Answer: Hexokinase

Question: Identify the compound that links glycolysis and Krebs cycle

• a) Acetyl CoA
• b) Pyruvic acid
• c) Oxaloacctate
• d) Lactic acid

Answer: Acetyl CoA

Question: F₀ base of oxysome is towards

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

Answer: Outer chamber

Question: Muscle cells starved of oxygen and supplied with pyruvic acid will produce

• a) Lactic acids
• b) Ethanol
• c) CO₂ only
• d) None of the above

Answer: Lactic acids

Question: Products of anaerobic respiration are

• a) Alcohol and CO₂
• b) CO₂ and water
• c) Water and oxygen
• d) Water and alcohol

Answer: Alcohol and CO₂