Which of the following factors can influence enzyme activity?
1. High temperature
2. pH
3. Substrate concentration
4. All of these
Subtopic: Factors Affecting Enzyme Catalysis Reaction |
94%
From NCERT
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What would happen to Vmax' in presence of a competitive inhibitor?
1. Decreases
2. Increases
3. Remains the same
4. First increases then decreases
1. Decreases
2. Increases
3. Remains the same
4. First increases then decreases
Subtopic: Factors Affecting Enzyme Catalysis Reaction |
55%
From NCERT
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Study the following graph of concept of activation energy given below. Select the correct option for stages labelled A to D.
| A | B | C | D | |
| 1 | Transition State | Potential energy | Activation energy without enzyme | Activation energy with enzyme |
| 2 | Kinetic energy | Potential energy | Activation energy without enzyme | Activation energy with enzyme |
| 3 | Potential energy | Transition state | Activation energy without enzyme | Activation energy with enzyme |
| 4 | Potential energy | Transition state | Activation energy without enzyme | Activation energy with enzyme |
Subtopic: Enzyme Catalysis |
77%
From NCERT
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Enzymes work at optimum temperature. Over a rang 0 - 40oC, what would happen to the rate of enzyme controlled reactions for every 10oC rise in temperature?
1. The rate doubles itself
2. Decreases by half
3. No effect
4. First increases then decreases
1. The rate doubles itself
2. Decreases by half
3. No effect
4. First increases then decreases
Subtopic: Factors Affecting Enzyme Catalysis Reaction |
61%
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Sugar that converts \(Cu^{2+} \rightarrow Cu^+\) during Benedict's test in not
1. Sucrose
2. Glucose
3. Fructose
4. Ribose
1. Sucrose
2. Glucose
3. Fructose
4. Ribose
Subtopic: Carbohydrates: Introduction |
53%
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You isolate an unidentified liquid ‘X' from a sample of beans. You add the liquid ‘X' to a beaker of water and shake it vigorously. After few minutes, water and the liquid ‘X' get separated into two layers where ‘X' floats on water. The unknown liquid ‘X' is most likely to be a/an
1. Enzyme
2. Protein
3. Lipid
4. Carbohydrate
1. Enzyme
2. Protein
3. Lipid
4. Carbohydrate
Subtopic: Lipids |
76%
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When a substrate binds to the active site of the enzyme, the altered structure of the substrate released by enzyme is called
1. Product
2. Transition state
3. Enzyme-substrate complex
4. Enzyme-product complex
1. Product
2. Transition state
3. Enzyme-substrate complex
4. Enzyme-product complex
Subtopic: Enzymes |
From NCERT
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Abrin and ricin are classified under which category of secondary metabolites?
1. Alkaloids
2. Drugs
3. Pigments
4. Toxins
1. Alkaloids
2. Drugs
3. Pigments
4. Toxins
Subtopic: Primary & Secondary Metabolites |
86%
From NCERT
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Most structural proteins are
1. Globular
2. Fibrous
3. Both (1) and (2)
4. Left-handedly coiled
1. Globular
2. Fibrous
3. Both (1) and (2)
4. Left-handedly coiled
Subtopic: Proteins |
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Match columns I and II.
Choose the correct option.
1. a(i), b(ii), c(iii), d(iv)
2. a(ii), b(iii), c(iv), d(i)
3. a(iii), b(iv), c(i), d(ii)
4. a(iv), b(i), c(ii), d(iii)
| Column I | Column II | |
| a | Trypsin | Hydrolyeses peptide bond |
| b | Cellulose | Unbranched polymer with -1,4 glycosidic linkages |
| c | Collagen | Most abundant protein in the animal world |
| d | Glut-4 | Enables glucose transport into cells |
1. a(i), b(ii), c(iii), d(iv)
2. a(ii), b(iii), c(iv), d(i)
3. a(iii), b(iv), c(i), d(ii)
4. a(iv), b(i), c(ii), d(iii)
Subtopic: Proteins | Carbohydrates: Starch & Glycogen | Carbohydrates: Cellulose, Chitin, Inulin & Agar |
86%
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