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NEET • BIOLOGY • RESPIRATION IN PLANTS
Respiration in plants practice · Mixed difficulty
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181
Hard
181 of 202
Understanding
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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
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In which part of mitochondria does ATP synthesis occur?
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Correct option: A
The correct answer is A () because ATP synthesis in mitochondria occurs at the particle of the ATP synthase complex, which protrudes into the mitochondrial matrix.
183
Hard
183 of 202
Understanding
+4 | -1
For every 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 molecule in the Calvin cycle requires 3 ATP and 2 NADPH.
184
Easy
184 of 202
Remembering
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Aerobic respiration takes place in
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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 is inadequate for cellular respiration, pyruvic acid is reduced into lactic acid by
View answer and explanation
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
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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 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
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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
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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
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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.
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196
Easy
196 of 202
Remembering
+4 | -1
Instantaneous source of energy is
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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 is not released?
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Correct option: D
Lactate fermentation
Option D (Lactate fermentation) is correct because it does not release 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
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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;
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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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