12th Grade > Biology
RESPIRATION IN PLANTS MCQs
Total Questions : 62
| Page 3 of 7 pages
Answer: Option C. -> Less than unity
:
C
RQ or respiratory quotient is the ratio of the volume of oxygen used to the volume of carbon dioxide generated when a given substrate is respired. The RQ formost of the common fats is about 0.7. The Pisum sativumor pea seed contains a lot of fatty acids and during germination, these fats are oxidized. Therefore the RQ od germinating Pisum sativum is about 0.7, that is less than unity.
:
C
RQ or respiratory quotient is the ratio of the volume of oxygen used to the volume of carbon dioxide generated when a given substrate is respired. The RQ formost of the common fats is about 0.7. The Pisum sativumor pea seed contains a lot of fatty acids and during germination, these fats are oxidized. Therefore the RQ od germinating Pisum sativum is about 0.7, that is less than unity.
Answer: Option B. -> Converted to heat
:
B
Energy is converted into heat if it is not captured by ATP.
:
B
Energy is converted into heat if it is not captured by ATP.
Answer: Option A. -> 3 ATP molecules
:
A
Oxidation of one molecule of NADH gives rise to 3 ATP molecules, 2.5 molecules of ATP to be exact according to recent research. The fraction is because ATP production is actually linked to the chemiosmotic diffusion of protons across the proton gradient, rather than a single reaction.
:
A
Oxidation of one molecule of NADH gives rise to 3 ATP molecules, 2.5 molecules of ATP to be exact according to recent research. The fraction is because ATP production is actually linked to the chemiosmotic diffusion of protons across the proton gradient, rather than a single reaction.
Answer: Option C. -> 19
:
C
Anaerobic respiration occurs in the absence of oxygen. It is found in deep-seated tissues plants and animals, germinating seeds, yeasts and bacteria. During anaerobic respiration of yeast, two ATP molecules are produced from each glucose molecule. Hence, 38 ATP will require19 glucose molecules.
:
C
Anaerobic respiration occurs in the absence of oxygen. It is found in deep-seated tissues plants and animals, germinating seeds, yeasts and bacteria. During anaerobic respiration of yeast, two ATP molecules are produced from each glucose molecule. Hence, 38 ATP will require19 glucose molecules.
Answer: Option D. -> Calvin cycle
:
D
Calvin's cycle does not occur in cellular respiration. This cycle is part of photosynthesis.
:
D
Calvin's cycle does not occur in cellular respiration. This cycle is part of photosynthesis.
Answer: Option C. -> Krebs Cycle
:
C
Kreb’s cycle provides 2 molecules of GTP directly; 6 molecules of NADH2(18 ATP) and two molecules of FADH2(4 ATP), i.e., 24 ATP out of 38 ATP.
:
C
Kreb’s cycle provides 2 molecules of GTP directly; 6 molecules of NADH2(18 ATP) and two molecules of FADH2(4 ATP), i.e., 24 ATP out of 38 ATP.
Answer: Option D. -> Glycolysis begins with glucose and ends with four pyruvate molecules
:
D
Glycolysis does produce four molecules of pyruvate. It begins with one molecule of Glucose, a 6C compound, which is split into two molecules of pyruvic acid, a 3C compound.
:
D
Glycolysis does produce four molecules of pyruvate. It begins with one molecule of Glucose, a 6C compound, which is split into two molecules of pyruvic acid, a 3C compound.
Answer: Option D. -> Inner membrane of mitochondria
:
D
ATP synthesis takes place in the ATP synthase complex of the Electron transport chain, which is found in the inner mitochondrial membrane. It is fuelled by the proton gradient created by oxidation of high energy molecules such as NADH and FADH2.
:
D
ATP synthesis takes place in the ATP synthase complex of the Electron transport chain, which is found in the inner mitochondrial membrane. It is fuelled by the proton gradient created by oxidation of high energy molecules such as NADH and FADH2.
Answer: Option B. -> Fermentation
:
B
In fermentation, the incomplete oxidation of glucose is achieved under, anaerobic condition by set of reactions, where pyruvic acid is converted into carbon dioxide and ethanol. The enzyme, pyruvic acid decarboxylase and alcohol dehydrogenase catalyse these reactions.
In aerobic respiration, the substrates are oxidised in the presence of an external electron acceptor, that is oxygen. Whereas anaerobic respiration, is carried out in the absence of oxygen, therefore they do not have any external electron acceptor. Instead the glycolytic product itself is further used as an electron acceptor to regenerate NAD+.
:
B
In fermentation, the incomplete oxidation of glucose is achieved under, anaerobic condition by set of reactions, where pyruvic acid is converted into carbon dioxide and ethanol. The enzyme, pyruvic acid decarboxylase and alcohol dehydrogenase catalyse these reactions.
In aerobic respiration, the substrates are oxidised in the presence of an external electron acceptor, that is oxygen. Whereas anaerobic respiration, is carried out in the absence of oxygen, therefore they do not have any external electron acceptor. Instead the glycolytic product itself is further used as an electron acceptor to regenerate NAD+.
Answer: Option B. -> Fats and proteins
:
B
Respiratory quotient or R.Q is theratio of the volume of carbon dioxide evolved to that of oxygen consumed by an organism, tissue, or cell in a given time. R.Q isless than one for fats & proteins.
R.Q is 1 for carbohydrates like sucrose and glucose and it is more than 1 for organic acids.
:
B
Respiratory quotient or R.Q is theratio of the volume of carbon dioxide evolved to that of oxygen consumed by an organism, tissue, or cell in a given time. R.Q isless than one for fats & proteins.
R.Q is 1 for carbohydrates like sucrose and glucose and it is more than 1 for organic acids.
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