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Q. No.Which biomolecule makes up maximum percent of the total cellular mass in an average cell?
1. Proteins
2. Carbohydrates
3. Lipids
4. Nucleic acids
Subtopic: Introduction |
81%
Level 1: 80%+
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The number of:
| 1. | Aromatic proteinogenic amino acids is 5 |
| 2. | Carbon atoms in arachidonic acid including carboxyl carbon is 20 |
| 3. | Fatty acids in cholesterol is 3 |
| 4. | Polypeptide chains in quaternary structure of haemoglobin is 2 |
Subtopic: Lipids: Glycerolipids, Phospholipids & Glycerol |
87%
Level 1: 80%+
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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 |
62%
Level 2: 60%+
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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 |
84%
Level 1: 80%+
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Which of the following amino acids is not an aromatic amino acid?
| 1. | Tyrosine | 2. | Tryptophan |
| 3. | Threonine | 4. | Phenylalanine |
Subtopic: Amino Acids |
85%
Level 1: 80%+
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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 |
91%
Level 1: 80%+
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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 |
88%
Level 1: 80%+
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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 |
79%
Level 2: 60%+
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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 |
75%
Level 2: 60%+
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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 |
88%
Level 1: 80%+
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