A.
Cellulose and Starch can hold I2 due to formation of helical secondary structures
B.
Proteins transport nutrient across cell membrane and fight infectious organisms
C.
At high-temperature, enzymes get damaged while inorganic catalysts work efficiently
D.
In animal tissue, different drugs, pigments, essential oil, magnesium, O2 compounds are noticed
E.
DNA and RNA have three chemically distinct components - heterocyclic ring, pentose monosaccharide and phosphate
Out of the statements given above about biomolecules, which of the statements are not correct?
1. D and E only
2. A and D only
3. A, B and D only
4. B, E and C only
Subtopic: Â The DNA |Â Proteins |Â Carbohydrates |
 63%
From NCERT
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| A. | Release of products of the reaction |
| B. | Binding of substrate to the active site of the enzyme |
| C. | Formation of enzyme-substrate complex |
| D. | Alteration in the shape of the enzyme |
| E. | Enzyme free to bind another molecule of substrate |
1. B > C > D > A > E
2. B > D > C > A > E
3. B > D > A > E > C
4. B > E > D > C > A
Subtopic: Â Enzymes |Â Enzyme Catalysis |
 55%
From NCERT
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Which of the following combination of factors affects enzyme activity?
A. Salinity & pH
B. Temperature
C. Concentration of substrate
D. Temperature & pH
E. pH
Choose the correct answer from the options given below:
1. A only
2. B only
3. C & D only
4. A & B only
Subtopic: Â Factors Affecting Enzyme Catalysis Reaction |
 86%
From NCERT
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Match List I with List II:
Choose the correct answer from the options given below:
1. A-II B-I C-III D-IV
2. A-IV B-III C-II D-I
3. A-I B-IV C-II D-III
4. A-III B-II C-IV D-I
| List I | List II |
| A. Collagen | I. Intercellular ground substances |
| B. GLUT- 4 | II. Flights infectious agents |
| C. Antibody | III. Sensory reception |
| D. Receptor | IV. Enables glucose transport into the cell |
1. A-II B-I C-III D-IV
2. A-IV B-III C-II D-I
3. A-I B-IV C-II D-III
4. A-III B-II C-IV D-I
Subtopic: Â Proteins |
 92%
From NCERT
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Which of the following are correct with respect to the effect of change in substrate concentration on enzyme activity?
A. At Vmax, reaction velocity is limited mainly by the number of substrate molecules present
B. At substrate concentration much below Km, the active site of an enzyme molecule is free most of the time
C. An enzyme with a high Km has a low affinity for its substrate
D. At very high substrate concentrations, the active site of an enzymes molecules is free most of the time
E. At very low substrate concentrations, reaction velocity is limited mainly by the number of enzyme molecules present
Choose the correct answer from the options given below:
1. A, B and D only
2. B and C only
3. A and C only
4. B, D and E only
A. At Vmax, reaction velocity is limited mainly by the number of substrate molecules present
B. At substrate concentration much below Km, the active site of an enzyme molecule is free most of the time
C. An enzyme with a high Km has a low affinity for its substrate
D. At very high substrate concentrations, the active site of an enzymes molecules is free most of the time
E. At very low substrate concentrations, reaction velocity is limited mainly by the number of enzyme molecules present
Choose the correct answer from the options given below:
1. A, B and D only
2. B and C only
3. A and C only
4. B, D and E only
Subtopic: Â Enzyme Catalysis |Â Factors Affecting Enzyme Catalysis Reaction |
 54%
Please attempt this question first.
Hints
Given below are two statements:
Statement I: An enzyme that can be allosterically activated is most likely to catalyze the final reaction in a bio-synthetic pathway
Statement II: An enzyme can be allosterically activated by compound X and allosterically inhibited by compound Y
In light of the above statements, choose the most appropriate answer from the options given below.
1. Both statement I and statement II are true
2. Both statement I and statement II are false
3. Statement I is correct but statement II is false
4. Statement I is incorrect but statement II is true
Statement I: An enzyme that can be allosterically activated is most likely to catalyze the final reaction in a bio-synthetic pathway
Statement II: An enzyme can be allosterically activated by compound X and allosterically inhibited by compound Y
In light of the above statements, choose the most appropriate answer from the options given below.
1. Both statement I and statement II are true
2. Both statement I and statement II are false
3. Statement I is correct but statement II is false
4. Statement I is incorrect but statement II is true
Subtopic: Â Enzyme Catalysis |Â Factors Affecting Enzyme Catalysis Reaction |
Please attempt this question first.
Hints
Which of the following compounds are secondary metabolites?
A. Morphine
B. Abrin
C. Lecithin
D. Uridine
E. Curcumin
Choose the correct answer from the option given below:
1. A & E only
2. A, B & E only
3. C & D only
4. A & C only
A. Morphine
B. Abrin
C. Lecithin
D. Uridine
E. Curcumin
Choose the correct answer from the option given below:
1. A & E only
2. A, B & E only
3. C & D only
4. A & C only
Subtopic: Â Primary & Secondary Metabolites |
 89%
From NCERT
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Which of the following statement is/are incorrect regarding polysaccharides?
Choose the correct answer from the options given below:
1. A, B, C only
2. B, D, E only
3. B, E only
4. B, C, D only
| A. | Inulin is a polymer of fructose |
| B. | Both starch and glycogen are present as storehouses of energy in plant tissue |
| C. | Glucose is a monomer of cellulose |
| D. | Cellulose is a homopolymer while chitin is a heteropolymer |
| E. | Starch does not contain complex helices and hence cannot hold I2 |
1. A, B, C only
2. B, D, E only
3. B, E only
4. B, C, D only
Subtopic: Â Carbohydrates: Starch & Glycogen |Â Carbohydrates: Cellulose, Chitin, Inulin & Agar |
 58%
From NCERT
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Given below are two statements :
Statement I: Organic compounds that are tightly bound to enzyme protein is called prosthetic group
Statement II: A complete catalytic active enzyme with its bound prosthetic group is called apoenzyme
In the light of the above statements, choose the most appropriate answer from the options given below
1. Both Statement I and Statement II are true
2. Both Statement I and Statement II are false
3. Statement I is true and Statement II is false
4. Statement I is false but Statement II is true
Statement I: Organic compounds that are tightly bound to enzyme protein is called prosthetic group
Statement II: A complete catalytic active enzyme with its bound prosthetic group is called apoenzyme
In the light of the above statements, choose the most appropriate answer from the options given below
1. Both Statement I and Statement II are true
2. Both Statement I and Statement II are false
3. Statement I is true and Statement II is false
4. Statement I is false but Statement II is true
Subtopic: Â Enzyme Cofactors |
From NCERT
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The amino acids, cysteine and methionine:
1. are not alpha amino acids
2. contain sulphur
3. are not present in any plant
4. are aromatic
1. are not alpha amino acids
2. contain sulphur
3. are not present in any plant
4. are aromatic
Subtopic: Â Amino Acids |
 87%
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