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Free download in PDF Cell Respiration Multiple Choice Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
(1)
When yeast ferments glucose, the products obtained are
[A]
ethanol and CO2
[B]
methanol and CO2
[C]
ethanol and water
[D]
water and CO2.
(2)
The First phase in the breakdown of glucose, in animal cell, is
[A]
fermentation
[B]
Krebs cycle
[C]
glycolysis
[D]
E.T.S.
(3)
Life without air would be
[A]
reductional
[B]
free from oxidative damage
[C]
impossible
[D]
anaerobic
(4)
Out of 38 ATP molecules produced per glucose, 32 ATP molecules are formed from NADH/FADH2 in
[A]
respiratory chain
[B]
Krebs cycle
[C]
oxidative decarboxylation
[D]
EMP
Answer: respiratory chain
(5)
End product of citric acid cycle/Krebs cycle is
[A]
citric acid
[B]
lactic acid
[C]
pyruvic acid
[D]
CO2 + H2O
(6)
Apparatus to measure rate of respiration and R.Q. is
[A]
auxanometer
[B]
potometer
[C]
respirometer
[D]
manometer
(7)
Oxidative phosphorylation is production of
[A]
ATP in photosynthesis
[B]
NADPH in photosynthesis
[C]
ATP in respiration
[D]
NADH in respiration
Answer: ATP in respiration
(8)
At a temperature above 35°C
[A]
rate of photosynthesis will decline earlier than that of respiration
[B]
rate of respiration will decline earlier than that of photosynthesis
[C]
there is no fixed pattern
[D]
both decline simultaneously
Answer: rate of photosynthesis will decline earlier than that of respiration
(9)
End products of aerobic respiration are
[A]
sugar and oxygen
[B]
water and energy
[C]
carbon dioxide, water and energy
[D]
carbon dioxide and energy
Answer: carbon dioxide, water and energy
(10)
Link between glycolysis, Krebs cycle and P-oxidation of fatty acid or carbohydrate and fat metabolism is
[A]
oxaloacetic acid
[B]
succinic acid
[C]
citric acid
[D]
acetyl CoA
(11)
Out of 36 ATP molecules produced per glucose molecule during respiration
[A]
2 are produced outside glycolysis and 34 during respiratory chain
[B]
2 are produced outside mitochondria and 34 inside mitochondria
[C]
2 during glycolysis and 34 during Krebs cycle
[D]
All are formed inside mitochondria
Answer: 2 are produced outside mitochondria and 34 inside mitochondria
(12)
Terminal cytochrome of respiratory chain which donates electrons to oxygen is
[A]
Cyt. b
[B]
Cyt. c
[C]
Cyt. A1
[D]
Cyt. a3.
(13)
Connecting link between glycolysis and Krebs cycle before pyruvate entering Krebs cycle is changed to
[A]
oxaloacetate
[B]
PEP
[C]
pyruvate
[D]
acetyl CoA
(14)
EMP can produce a total of
[A]
6 ATP
[B]
8 ATP
[C]
24 ATP
[D]
38 ATP
(15)
R.Q- is ratio of
[A]
CO2 produced to substrate consumed
[B]
CO2 produced to O2 consumed
[C]
oxygen consumed to water produced
[D]
oxygen consumed to CO2 produced.
Answer: CO2 produced to O2 consumed
(16)
End product of glycolysis is
[A]
acetyl CoA
[B]
pyruvic acid
[C]
glucose I-phosphate
[D]
fructose I-phosphate
(17)
R.Q. is
[A]
C/N
[B]
N/C
[C]
CO2/O2
[D]
O2/CO2
(18)
NADP+ is reduced to NADPH is
[A]
HMP
[B]
Calvin Cycle
[C]
Glycolysis
[D]
EMP
(19)
Incomplete oxidation of glucose into pyruvic acid with several intermediate steps is known as
[A]
TCA-pathway
[B]
glycolysis
[C]
HMS-pathway
[D]
Krebs cycle
(20)
The ultimate respiratory substrate, yielding maximum number of ATP molecules, is
[A]
glycogen
[B]
ketogenic amino acid
[C]
glucose
[D]
amylose
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