Aerobic Respiration MCQs : This section focuses on the "Aerobic Respiration". These Multiple Choice Questions (MCQs) should be practiced to improve the Aerobic Respiration skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.
Question 1
After entering the mitochondrial matrix, pyruvate undergoes reductive decarboxylation.
A. True
B. False
Question 2
After the condensation of an acetyl group, citrate is replaced by malic acid.
A. True
B. False
Question 3
Complex IV is responsible for the production of ATP.
A. True
B. False
Question 4
Cytochrome c acts a carrier between which of the two complexes?
A. Complex I and Complex II
B. Complex II and Complex III
C. Complex III and Complex IV
D. Complex IV and Complex V
Question 5
How many CO2 molecules are left during the complete oxidation of pyruvate?
A. One
B. Two
C. Five
D. Three
Question 6
How many copper centres are present in Complex IV?
A. One
B. Two
C. Three
D. Four
Question 7
How many molecules of NADH are produced by the metabolism of pyruvic acid?
A. One
B. Two
C. Three
D. Four
Question 8
How many points are there in the TCA cycle where NAD+ is reduced?
A. One
B. Two
C. Three
D. Four
Question 9
How many steps of decarboxylation lead to the formation of ketoglutaric acid?
A. One
B. Three
C. Two
D. Seven
Question 10
The number of ATP molecules synthesised depends upon which of the following?
A. Nature of electron donor
B. Nature of electron acceptor
C. Nature of proton donor
D. Nature of atom
Question 11
The TCA cycle starts with the condensation of which of the following compounds?
A. Sucrose
B. Acetyl group
C. Ethanol
D. Pyruvate
Question 12
Ubiquinone receives electrons from Complex I and Complex IV.
A. True
B. False
Question 13
What is aerobic respiration?
A. Partial oxidation of glucose
B. Incomplete oxidation of glucose
C. Complete oxidation of organic substances
D. Complete oxidation of only glucose
Question 14
What is reduced Ubiquinone called as?
A. Ubiquinone
B. Ubiquity
C. Ubiquinol
D. Ubiquinal
Question 15
What is the full form of ETS?
A. Electrolyte Transport Serum
B. Electrolyte Tissue System
C. Electron Transport System
D. Electron Transmission System
Question 16
What is the efficiency of aerobic respiration?
A. More than 75%
B. Approximately 45%
C. Less than 20%
D. 99%
Question 17
What is the full form of SLP?
A. Subgeneric Level of Phosphorylation
B. Subcutaneous Level Photophosphorylation
C. Substrate Level Phosphorylation
D. Substrate Level Pyruvatisation
Question 18
What is the use of ETS?
A. To release and utilise energy
B. To store energy
C. To transfer energy to the surroundings
D. To take energy from the surroundings
Question 19
Where are the electrons passed in ETS?
A. Oxygen
B. Water
C. Carbon
D. Nitrogen
Question 20
Where does aerobic respiration usually takes place?
A. Lower vertebrates
B. Higher organisms
C. Prokaryotes
D. Only unicellular eukaryotes
Question 21
Which of the following complexes in ETS are involved in the transport of protons?
A. Complex I
B. Complex II
C. Complex V
D. Complex IV
Question 22
Which of the following compounds is the first member of the TCA cycle?
A. Oxaloacetic acid
B. α-ketoglutaric acid
C. Succinic acid
D. Malic acid
Question 23
Which of the following energy is utilised for the production of the proton gradient in ETS?
A. Energy of Oxygen
B. Energy of Hydrogen
C. Energy of Phosphorous
D. Energy of Oxidation-Reduction
Question 24
Which of the following is a crucial event in aerobic respiration?
A. Simultaneous synthesis of ATP
B. Synthesis of ethanol and water
C. Complete oxidation of methanol
D. Complete oxidation of carbon-dioxide
Question 25
Which of the following is the final hydrogen acceptor?
A. Phosphorous
B. Carbon
C. Nitrogen
D. Oxygen
Question 26
Which of the following participates in the reaction catalysed by pyruvic dehydrogenase?
A. Carbon dioxide
B. Water
C. Ethanol
D. Coenzyme A
Question 27
Which of the following points are not necessary for the TCA to run continuously?
A. Replenishment of Oxaloacetic acid
B. Regeneration of NAD+
C. Regeneration of FAD+
D. Regeneration of malic acid
Question 28
Who discovered the Tricarboxylic acid cycle?
A. Hans Krebs
B. Ernst Haeckel
C. Louis Pasteur
D. Charles Darwin