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. |
Exoskeleton of arthropods is composed of :
1. Glucosamine
2. Cutin
3. Cellulose
4. Chitin
Read the following statements on lipids and find out correct set of statements:
a: | Lecithin found in the plasma membrane is a glycolipid. |
b: | Saturated fatty acids possess one or more c=c bonds. |
c: | Gingely oil has lower melting point, hence remains as oil in winter. |
d: | Lipids are generally insoluble in water but soluble in some organic solvents. |
e: | When fatty acid is esterified with glycerol, monoglycerides are formed. |
Choose the correct answer from the options given below:
1. (a), (b) and (d) only
2. (a), (b) and (c) only
3. (a), (d) and (e) only
4. (c), (d) and (e) only
List - I (Biological Molecules) | List - II (Biological functions) |
(a) Glycogen | (i) Hormone |
(b) Globulin | (ii) Biocatalyst |
(c) Steroids | (iii) Antibody |
(d) Thrombin | (iv) Storage product |
(a) | (b) | (c) | (d) | |
1. | (iv) | (iii) | (i) | (ii) |
2. | (iii) | (ii) | (iv) | (i) |
3. | (iv) | (ii) | (i) | (iii) |
4. | (ii) | (iv) | (iii) | (i) |
Given below are two statements:
Statement I: | Cellulose is a polymeric polysaccharide |
Statement II: | The building blocks of cellulose are glucose molecules |
In the light of the above statements , choose the correct answer from the options given below:
1. | Statement I is correct but Statements II is incorrect. |
2. | Statements I is incorrect but Statements II is correct. |
3. | Both Statements I and Statements II are correct. |
4. | Both Statements I and Statements II are false. |
Which of the following bond is formed as a result of reaction of carboxyl group of one amino acid with amino group of other amino acids with elimination of water?
1. Phosphodiester Bond
2. Hydrogen Bond
3. Glycosidic Bond
4. Peptide Bond
In a reaction catalyzed by an enzyme, which of the following statements is correct ?
1. | Enzymes decrease the activation energy for formation of transition state. |
2. | Enzymes make transition form substrate to product more difficult. |
3. | Enzymes increase the activation energy for formation of transition state. |
4. | Enzyme-substrate complex formed during a reaction lasts for a very long time. |