All enzymes are:
1. Proteins
2. Thermostable
3. Capable of speeding up a biochemical reaction
4. Capable of working in alkaline pH
Subtopic: Enzymes | Factors Affecting Enzyme Catalysis Reaction |
59%
From NCERT
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A secondary metabolite, produced by castor oil plant, that is a highly potent toxin is:
1. Morphine
2. Concanavalin A
3. Ricin
4. Vinblastin
1. Morphine
2. Concanavalin A
3. Ricin
4. Vinblastin
Subtopic: Primary & Secondary Metabolites |
83%
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Which of the following amino acids is not an aromatic amino acid?
1. Tyrosine
2. Tryptophan
3. Threonine
4. Phenylalanine
1. Tyrosine
2. Tryptophan
3. Threonine
4. Phenylalanine
Subtopic: Amino Acids |
83%
From NCERT
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The number and linear sequence of amino acids in a protein are considered as the:
1. primary structure of a protein
2. secondary structure of a protein
3. tertiary structure of a protein
4. quaternary structure of a protein
1. primary structure of a protein
2. secondary structure of a protein
3. tertiary structure of a protein
4. quaternary structure of a protein
Subtopic: Proteins |
90%
From NCERT
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Regarding factors affecting enzyme activity:
| I: | Low temperature preserves the enzyme in a temporarily inactive state whereas high temperature destroys enzymatic activity. |
| II: | With the increase in substrate concentration, the velocity of the enzymatic reaction rises at first. |
| 1. | Only I is correct |
| 2. | Only II is correct |
| 3. | Both I and II are correct |
| 4. | Both I and II are incorrect |
Subtopic: Factors Affecting Enzyme Catalysis Reaction |
86%
From NCERT
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Identify the correct statement:
| 1. | α amino acids are substituted methanes |
| 2. | Only triglycerides are lipids that are both macromolecules as well as polymers |
| 3. | Cellulose forms secondary helical structures and can hold iodine molecules in the helical portion |
| 4. | Every virus will have both DNA and RNA as its genetic material |
Subtopic: Amino Acids |
76%
From NCERT
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Identify the incorrectly match pair:
| 1. | RuBisCO | Most abundant protein in the whole of the biosphere |
| 2. | Insulin | A polymer of fructose |
| 3. | Vinblastin | A secondary metabolite used as a drug |
| 4. | Adenine | A substituted purine |
Subtopic: Proteins | Primary & Secondary Metabolites |
70%
From NCERT
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Regarding various levels of protein structure, which of the following is not true?
| 1. | The positional information of amino acids in a protein is called the primary structure. |
| 2. | Alpha helix is a secondary structure and beta pleated sheet is a tertiary structure of a protein. |
| 3. | Tertiary structure is absolutely necessary for the many biological activities of proteins. |
| 4. | Quaternary structures are seen in proteins made of more than one polypeptide chain. |
Subtopic: Proteins |
86%
From NCERT
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The chemistry of malonate is similar to succinate and it can exclude succinate to bind to the active site of the enzyme succinic dehydrogenase. What type of inhibition is this?
1. Competitive
2. Non-competitive
3. Allosteric
4. Un-competitive
1. Competitive
2. Non-competitive
3. Allosteric
4. Un-competitive
Subtopic: Enzyme Inhibition: Introduction | Enzyme Inhibition |
90%
From NCERT
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Identify the correct statement:
I. Collagen is the most abundant protein in animal world.
II. RuBisCO is the most abundant protein in the whole of the biosphere.
III. B-DNA is the most common double helical structure found in nature.
1. Only I and II
2. Only I and III
3. Only II and III
4. I, II and III
I. Collagen is the most abundant protein in animal world.
II. RuBisCO is the most abundant protein in the whole of the biosphere.
III. B-DNA is the most common double helical structure found in nature.
1. Only I and II
2. Only I and III
3. Only II and III
4. I, II and III
Subtopic: The DNA | Proteins |
55%
From NCERT
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