a. | Alanine is a sulphur containing amino acid |
b. | Tyrosine is an aromatic amino acid |
c. | Uracil is a substituted pyrimidine found in nucleic acids containing deoxyribose sugar |
d. | The nitrogenous bases are projected more or less perpendicular to the sugar-phosphate backbone of polynucleotide chain |
The number of correct statements amongst the given statements is:
I. Amino acids are substitute methanes.
II. The R group in serine is hydroxyl-methyl.
III. Arachidonic acid has 20 carbon atoms including the carboxyl carbon.
IV. Glycerol is trihydroxypropane.
V. Lecithin is a phospholipid.
1. 2
2. 3
3. 4
4. 5
Statement I: | Amino acids have a property of ionizable nature of –NH2 and –COOH groups, hence have different structures at different pH. |
Statement II: | Amino acids can exist as Zwitterionic form at acidic and basic pH. |
1. | Both Statement I and Statement II are correct. |
2. | Both Statement I and Statement II are Incorrect. |
3. | Statement I is correct but Statement II is incorrect. |
4. | Statement I is incorrect but Statement II is correct. |