Subtopic: Amino Acids |
78%
Level 2: 60%+
Hints
Subtopic: Nucleic Acid: Nucleotides |
Level 3: 35%-60%
Hints
Consider the given statements regarding some important secondary metabolites:
1. Only I, II and III are correct
2. Only I, III and IV are correct
3. Only II, III and IV are correct
4. I, II, III and IV are correct
| I: | Morphine is a strong opiate that is found naturally in opium and is mainly used as a pain medication. |
| II: | Ricin is a toxin and a highly potent toxin produced in the seeds of the castor oil plant. |
| III: | Concanavalin A is a lectin and is widely used in biology and biochemistry to characterize glycoproteins and other sugar-containing entities on the surface of various cells. |
| IV: | Vinblastin is an anti-cancer drug typically used with other medications, to treat a number of types of cancer. |
2. Only I, III and IV are correct
3. Only II, III and IV are correct
4. I, II, III and IV are correct
Subtopic: Primary & Secondary Metabolites |
81%
Level 1: 80%+
Hints
The given figure represents structure of glycogen/amylopectin. Identify A, B, C and D:
| A | B | C | D | |
| 1. | Reducing end | Non reducing end | α [1→4] linkage | α [1→6] linkage |
| 2. | Non reducing end | Reducing end | α [1→4] linkage | α [1→6] linkage |
| 3. | Reducing end | Non reducing end | α [1→6] linkage | α [1→4] linkage |
| 4. | Non reducing end | Reducing end | α [1→6] linkage | α [1→4] linkage |
Subtopic: Carbohydrates | Carbohydrates: Glycosidic Bond & Disaccharide | Carbohydrates: Starch & Glycogen |
Level 4: Below 35%
Hints
What level of protein structure is shown in the given diagram?
| 1. Primary | 2. Secondary |
| 3. Tertiary | 4. Quaternary |
Subtopic: Proteins |
67%
Level 2: 60%+
Hints
Which of the following categories of enzyme classification are correctly matched?
| EC 1 | Oxidoreductases: catalyze oxidation/reduction reactions |
| EC 2 | Hydrolases: catalyze the hydrolysis of various bonds |
| EC 3 | Transferases: transfer a functional group (e.g. a methyl or phosphate group) |
| EC 4 | Lyases: cleave various bonds by means other than hydrolysis and oxidation |
| EC 5 | Isomerases: catalyze isomerization changes within a single molecule |
| EC 6 | Ligases: join two molecules with covalent bonds. |
1. EC 1, EC 4, EC 5 and EC 6 only
2. EC 2 and EC 3 only
3. EC 1, EC 4 and EC 6 only
4. EC 3, EC 4, EC 5 and EC 6 only
Subtopic: Enzymes Classification |
61%
Level 2: 60%+
Hints
Enzymes A, B and C in the given figure can be:
| A | B | C | |
| 1. | Gastric lipase | Salivary amylase | Lingual lipase |
| 2. | Pepsin | Salivary amylase | Trypsin |
| 3. | Pepsin | Trypsin | Lactase |
| 4. | Rennin | Maltase | Sucrase |
Subtopic: Factors Affecting Enzyme Catalysis Reaction |
70%
Level 2: 60%+
Hints
In the given diagram of DNA double helix, what would be the correct values of 1, 2, and 3 in nanometre?
| 1 | 2 | 3 | |
| 1. | 1.0 | 3.4 | 34 |
| 2. | 2.0 | 0.34 | 3.4 |
| 3. | 2.0 | 3.4 | 0.34 |
| 4. | 4.0 | 3.4 | 0.34 |
Subtopic: The DNA |
74%
Level 2: 60%+
Hints
Given below is a schematic diagram of a metabolic pathway in living organisms. Please do not try to decipher anything from the given diagram. Can you tell what will be true for metabolic pathways in living organisms in general?
I. Biomolecules in a living organism have a turn over.
II. Metabolic pathways cross-cross each other.
III. Flow of metabolites through metabolic pathways has a definite rate and direction.
1. Only I and II
2. Only I and III
3. Only II and III
4. I, II and III
I. Biomolecules in a living organism have a turn over.
II. Metabolic pathways cross-cross each other.
III. Flow of metabolites through metabolic pathways has a definite rate and direction.
1. Only I and II
2. Only I and III
3. Only II and III
4. I, II and III
71%
Level 2: 60%+
Please attempt this question first.
Hints
Identify the correct statement regarding the figure given:
| 1. | A is an ester bond; B is a glycosidic bond and they are type of hydrogen bonds |
| 2. | A is an ester bond; B is a glycosidic bond and they are formed by dehydration synthesis |
| 3. | A is a peptide bond; B is a glycosidic bond and they are types of hydrogen bonds |
| 4. | A is a peptide bond; B is an ester bond and they are formed by dehydration synthesis |
Subtopic: The DNA |
76%
Level 2: 60%+
Please attempt this question first.
Hints
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