Q. No.What is incorrect regarding the double helix model of DNA given by Watson and Crick?
1.
At each step of ascent the strand turns
360
2.
The pitch
3.4 nm
3.
The rise per base pair
0.34 nm
4.
Diameter
10 nm
Identify the incorrect statement:
1. The protein portion of enzymes is called as a holoenzyme
2. Haem is the prosthetic group in peroxidase and catalase
3. Co-enzymes are organic compounds that have a transient association with the protein part of the enzyme
4. Catalytic activity is lost when the co-factor is removed from the enzyme
Match the following:
| (a) | Inhibitor of catalytic activity of succinate dehydrogenase | (i) | Ricin |
| (b) | Possess peptide bonds | (ii) | Malonate |
| (c) | Cell wall material in fungi | (iii) | Chitin |
| (d) | Secondary metabolite | (iv) | Collagen |
Choose the correct option from the following:
| (a) | (b) | (c) | (d) | |
| 1. | (iii) | (i) | (iv) | (ii) |
| 2. | (iii) | (iv) | (i) | (ii) |
| 3. | (ii) | (iii) | (i) | (iv) |
| 4. | (ii) | (iv) | (iii) | (i) |
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
Identify the basic amino acid from the following.
| 1. | Glutamic Acid | 2. | Lysine |
| 3. | Valine | 4. | Tyrosine |
The primary structure of a polypeptide has
1. Interchain disulphide bonds
2. Peptide bonds
3. H-bonds
4. Glycosidic bonds
Consider the given two statements:
I. The living state and metabolism are synonymous.
II. Living state is a non-equilibrium steady-state to be able to perform work.
1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. I is correct but II is incorrect
4. Both I and II are incorrect
What would be true for the structure of a biomolecule shown below?
1. It shows the primary structure of a polypeptide where A is the C-terminus; B is the peptide bond and C is the N-terminus.
2. It shows the secondary structure of a polypeptide where A is the C-terminus; B is the peptide bond and C is the N-terminus.
3. It shows the primary structure of a polypeptide where A is the N-terminus; B is the peptide bond and C is the C-terminus.
4. It shows the secondary structure of a polypeptide where A is the C-terminus; B is the N-glycosidic bond andzC is the N-terminus.
An aromatic amino acid which is not an essential amino acid is the precursor of catecholamines [adrenaline/noradrenaline/dopamine] and also involved in the synthesis of iodothyronines is:
1. Tryptophan
2. Threonine
3. Phenylalanine
4. Tyrosine
The molecule shown in the given diagram:
I. is a lipid.
II. is biosynthesized from acetyl coA.
III. is a precursor of steroid hormones in animals.
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
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