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. |
Regarding RuBisCO:
I: | It is the most abundant protein in the whole of the biosphere. |
II: | Mg2+ is its activator |
1. | Only I is correct |
2. | Only II is correct |
3. | Both I and II are correct |
4. | Both I and II are incorrect |
Which of the following is the least likely to be involved in stabilizing the three-dimensional folding of most proteins?
1. | Ester bonds | 2. | Hydrogen bonds |
3. | Electrostatic interaction | 4. | Hydrophobic interaction |
Identify the zwitter ion configuration of alanine:
1. | 2. | ||
3. | 4. |
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Assertion (A): | Dietary proteins are the source of essential amino acids. |
Reason (R): | All essential amino acids are aromatic. |
1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
3. | (A) is True but (R) is False. |
4. | Both (A) and (R) are False. |
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 |
A pure protein should normally have
1. | Two ends | 2. | One end |
3. | Three ends | 4. | No ends |
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Identify the substances having a glycosidic bond and peptide bond, respectively in their structure:
1. | Glycerol, trypsin | 2. | Cellulose, lecithin |
3. | Inulin, insulin | 4. | Chitin, cholesterol |