Select Chapter Topics:
Q. No.Consider the given two statements:
Assertion (A):
During oxidation within a cell, all the energy contained in respiratory substrates is released free into the cell, in a single step.
Reason (R):
The energy released by oxidation in respiration is not (or rather cannot be) used directly but is used to synthesise ATP.
1.
Both (A) and (R) are True and (R) correctly explains (A).
2.
Both (A) and (R) are True but (R) does not correctly explain (A).
3.
(A) is True but (R) is False.
4.
(A) is False but (R) is True.
Subtopic: Respiratory Quotient | THE RESPIRATORY BALANCE SHEET |
92%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Plants can get along without respiratory organs. The reasons for this will include all the following except:
| 1. | Each plant part takes care of its own gas-exchange needs. |
| 2. | Plants present great demands for gas exchange. |
| 3. | The distance that gases must diffuse even in large, bulky plants is not great. |
| 4. | Each living cell in a plant is located quite close to the surface of the plant. |
Subtopic: Introduction |
79%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
How many ATP molecules are directly synthesised in the glycolytic pathway from one glucose molecule?
1. 2
2. 4
3. 10
4. 30
1. 2
2. 4
3. 10
4. 30
Subtopic: Glycolysis Regulation | Respiratory Quotient | THE RESPIRATORY BALANCE SHEET |
63%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
For aerobic respiration to take place within the mitochondria, the final product of glycolysis, pyruvate:
| 1. | is transported from the cytoplasm into the mitochondria. |
| 2. | undergoes oxidative decarboxylation in the cytosol. |
| 3. | is reduced to lactate in liver. |
| 4. | is transported from the cytoplasm first into the Golgi apparatus, where it is packaged and then transported into the mitochondrion. |
Subtopic: Glycolysis | Glycolysis Regulation | Aerobic Respiration |
83%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
The crucial events in aerobic respiration are:
1. Only A is correct
2. Only B is correct
3. Both A and B are correct
4. Both A and B are incorrect
| A: | The partial oxidation of pyruvate by the stepwise removal of all the hydrogen atoms, leaving six molecules of CO2. |
| B: | The passing on of the electrons removed as part of the hydrogen atoms to molecular O2 with simultaneous synthesis of ATP. |
2. Only B is correct
3. Both A and B are correct
4. Both A and B are incorrect
Subtopic: Aerobic Respiration |
63%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Two successive steps of decarboxylation in the TCA cycle lead to the formation of:
1. α-ketoglutaric acid
2. fumaric acid
3. isocitric acid
4. succinyl-CoA
1. α-ketoglutaric acid
2. fumaric acid
3. isocitric acid
4. succinyl-CoA
Subtopic: Kreb's Cycle |
70%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
It is possible to make calculations of the net gain of ATP for every glucose molecule oxidised; but in reality this can remain only a theoretical exercise. These calculations can be made only on certain assumptions including all the following except:
| 1. | There is a sequential, orderly pathway functioning, with one substrate forming the next and with glycolysis, TCA cycle and ETS pathway following one after another. |
| 2. | The NADH synthesised in glycolysis does not get transferred into the mitochondria and does not undergo oxidative phosphorylation. |
| 3. | None of the intermediates in the pathway are utilised to synthesise any other compound. |
| 4. | Only glucose is being respired – no other alternative substrates are entering in the pathway at any of the intermediary stages. |
Subtopic: Glycolysis | Glycolysis Regulation |
82%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
The correct comparisons between fermentation and aerobic respiration will include:
1. Only A
2. Only A and B
3. Only B and C
4. A, B and C
| Fermentation | Aerobic respiration | |
| A. | accounts for only a partial breakdown of glucose | glucose is completely degraded to CO2 and H2O |
| B. | there is a net gain of only two molecules of ATP for each molecule of glucose degraded to pyruvic acid | there is a net gain of many more molecules of ATP for each molecule of glucose degraded to pyruvic acid |
| C. | NADH is oxidised to NAD+ vigorously | NADH is oxidised to NAD+rather slowly |
2. Only A and B
3. Only B and C
4. A, B and C
Subtopic: Fermentation | Aerobic Respiration |
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
The number of correct statements from the given statements regarding possible respiratory substrates is:
1. 1
2. 2
3. 3
4. 4
| I: | Glucose is the favoured substrate for respiration. |
| II: | All carbohydrates are usually first converted into glucose before they are used for respiration. |
| III: | Glycerol would enter the pathway after being converted to Acetyl CoA. |
| IV: | Proteins and amino acids cannot be used as respiratory substrates. |
2. 2
3. 3
4. 4
Subtopic: Amphibolic Nature of Respiration |
60%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
A eukaryotic cell respires aerobically and uses glucose as the respiratory substrate. Which of the following steps in the process will take place in the cytoplasm of the cell?
1. glycolysis
2. Krebs cycle
3. electron transport system
4. transition reaction
1. glycolysis
2. Krebs cycle
3. electron transport system
4. transition reaction
Subtopic: Glycolysis | Glycolysis Regulation |
94%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Select Chapter Topics:
© 2024 GoodEd Technologies Pvt. Ltd.