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NEET • BIOLOGY • RESPIRATION IN PLANTS

Respiration in plants practice · Mixed difficulty

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Showing 181-202 of 202 questions
181 Hard
181 of 202
Understanding +4 | -1
In Krebs cycle
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Correct option: A
Acetyl Co-enzyme A undergoes 4 oxidations and 2 decarboxylations
Option A (Acetyl Co-enzyme A undergoes 4 oxidations and 2 decarboxylations) is correct because during the Krebs cycle, Acetyl Co-A is oxidized four times and decarboxylated twice.
182 Medium
182 of 202
Remembering +4 | -1
In which part of mitochondria does ATP synthesis occur?
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Correct option: A
F1{F_1}
The correct answer is A (F1{F_1}) because ATP synthesis in mitochondria occurs at the F1{F_1} particle of the ATP synthase complex, which protrudes into the mitochondrial matrix.
183 Hard
183 of 202
Understanding +4 | -1
For every CO2C{O_2} molecule entering the Calvin cycle. How many ATP and NADPH are required?
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Correct option: A
3 and 2
Option A (3 and 2) is correct because the fixation of one CO2C{O_2} molecule in the Calvin cycle requires 3 ATP and 2 NADPH.
184 Easy
184 of 202
Remembering +4 | -1
Aerobic respiration takes place in
View answer and explanation
Correct option: A
Mitochondria
Option A (Mitochondria) is correct because aerobic respiration, which requires oxygen, primarily occurs in the mitochondria of eukaryotic cells.
185 Easy
185 of 202
Remembering +4 | -1
Which of the following scientist has given the scheme of glycolysis?
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Correct option: A
Gustav Embden et. Al
Option A is correct because Gustav Embden, along with Otto Meyerhof and Jakub Karol Parnas, elucidated the steps of glycolysis.
186 Medium
186 of 202
Understanding +4 | -1
In animal cells, like muscle, during exercise when O2{O_2} is inadequate for cellular respiration, pyruvic acid is reduced into lactic acid by
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Correct option: C
Lactate dehydrogenase
Option C is correct because lactate dehydrogenase is the enzyme that catalyzes the reduction of pyruvic acid to lactic acid during anaerobic respiration in muscle cells.
187 Medium
187 of 202
Understanding +4 | -1
Which of the following reaction does not take place in the cell organelle, that is referred to as ‘Power house of the cell’?
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Correct option: B
Glyceraldehyde 3-phosphate dehydrogenation
Option B (Glyceraldehyde 3-phosphate dehydrogenation) is correct because glyceraldehyde 3-phosphate dehydrogenation occurs in the cytoplasm during glycolysis, not in the mitochondria (powerhouse of the cell).
188 Hard
188 of 202
Remembering +4 | -1
RQ is always less than one in
View answer and explanation
Correct option: D
Castor
Option D (Castor) is correct because castor seeds are rich in fats, and fats have an RQ less than one.
189 Hard
189 of 202
Understanding +4 | -1
When FADH2FAD{H_2} is oxidized through ETS
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Correct option: C
Both 1 and 2
Option C is correct because when FADH2 is oxidized through the electron transport system (ETS), it produces 2 ATP molecules and consumes 1/2 O2.
190 Easy
190 of 202
Understanding +4 | -1
In hurdle race, which of the following is accumulated in the leg muscle?
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Correct option: B
Glycolysis
Option C (Lactate) is correct because during intense exercise like a hurdle race, the muscles may not receive enough oxygen, leading to anaerobic respiration and the accumulation of lactate (lactic acid).
191 Easy
191 of 202
Remembering +4 | -1
During the exercise, pyruvic acid is reduced to
View answer and explanation
Correct option: A
Lactic acid
Option A (Lactic acid) is correct because during intense exercise, when oxygen is limited, pyruvic acid is reduced to lactic acid.
192 Hard
192 of 202
Understanding +4 | -1
In ETS electrons move from
View answer and explanation
Correct option: D
1 and 2
Option D is correct because in the electron transport system (ETS), electrons move from NADH and FADH2 to oxygen, which acts as the final electron acceptor.
193 Easy
193 of 202
Understanding +4 | -1
In anaerobic respiration in plants
View answer and explanation
Correct option: C
Carbon dioxide is released
Option C (Carbon dioxide is released) is correct because during anaerobic respiration in plants, carbon dioxide is released as a byproduct of fermentation.
194 Easy
194 of 202
Remembering +4 | -1
Which of the following steps of respiration takes place in cytoplasm?
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Correct option: C
Glycolysis
Option C is correct because glycolysis, the breakdown of glucose, occurs in the cytoplasm of the cell.
195 Hard
195 of 202
Analyzing +4 | -1
During the early stages of alcoholic fermentation there is a high rate of growth of yeast. After some time the rate decreases. Which of the following conditions in the culture medium is least likely to have caused this?
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Correct option: B
Depletion of oxygen
Option B (Depletion of oxygen) is correct because alcoholic fermentation is an anaerobic process and does not require oxygen. The depletion of oxygen would not decrease the growth rate.
196 Easy
196 of 202
Remembering +4 | -1
Instantaneous source of energy is
View answer and explanation
Correct option: D
Glucose
Option D is correct because glucose is a monosaccharide that can be directly used for energy, providing an instantaneous source.
197 Hard
197 of 202
Understanding +4 | -1
In which one of the following processes CO2C{O_2} is not released?
View answer and explanation
Correct option: D
Lactate fermentation
Option D (Lactate fermentation) is correct because it does not release CO2CO_2 as a byproduct, unlike the other processes.
198 Medium
198 of 202
Remembering +4 | -1
All of the given are reactants of TCA cycle except
View answer and explanation
Correct option: D
Pyruvic acid
Option D (Pyruvic acid) is correct because pyruvic acid is a product of glycolysis and a precursor to acetyl-CoA, which enters the TCA cycle, but it is not a direct reactant *within* the TCA cycle itself.
199 Medium
199 of 202
Understanding +4 | -1
Which of the following substances yield less than 4 kcal/mol when its phosphate bond is hydrolysed?
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Correct option: C
Glucose-6-phosphate
Option C (Glucose-6-phosphate) is correct because glucose-6-phosphate has a lower energy phosphate bond compared to the other compounds listed.
200 Medium
200 of 202
Understanding +4 | -1
Which of the following steps during glycolysis is associated with utilization of ATP?
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Correct option: D
Both 1 and 2
Option D (Both 1 and 2) is correct because ATP is used in the phosphorylation of glucose to glucose-6-phosphate and fructose-6-phosphate to fructose-1,6-bisphosphate during glycolysis.
201 Medium
201 of 202
Understanding +4 | -1
Select the correct option w.r.t. increasing order of respiratory quotient of various substrates.
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Correct option: A
Fats < Protein < Oxalic acid
Option A is correct because the RQ values increase in the order: Fats (0.7) < Protein (0.8-0.9) < Oxalic acid (4.0).
202 Hard
202 of 202
Remembering +4 | -1
Aerobic fate of pyruvate is occurred in;
View answer and explanation
Correct option: B
mitochondria.
Option B (mitochondria) is correct because the aerobic fate of pyruvate, including the citric acid cycle and electron transport chain, occurs within the mitochondria.
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