Q. No.| Statement I: | Palmitic acid has 16 carbons including carboxyl carbon. |
| Statement II: | Arachidonic acid has 20 carbon atoms including the carboxyl carbon. |
| Statement III: | Adenosine, guanosine, thymidine, uridine and cytidine are nucleosides. |
| Statement IV: | Nucleic acids like DNA and RNA consist of nucleotides only. |
| Statement I | Statement II | Statement III | Statement IV | |
| 1. | T | T | T | T |
| 2. | T | T | F | F |
| 3. | F | F | T | T |
| 4. | F | F | F | F |
| 1. | Glycine | 2. | Serine |
| 3. | Alanine | 4. | Methionine |
| A: | A nucleotide consists of a pentose sugar, nitrogenous base, and phosphate group. |
| B: | Phosphodiester bonds link nucleotides in a polynucleotide chain. |
| C: | Purines include adenine and cytosine. |
| D: | Pyrimidines include guanine, thymine, and uracil. |
| 1. | A and B only | 2. | B and C only |
| 3. | A, B and D only | 4. | A, C and D only |
| Statement I: | Nucleotides consist of a nitrogenous base, a pentose sugar, and a phosphate group. |
| Statement II: | Uracil is a nitrogenous base found in both DNA and RNA. |
| 1. | Statement I is correct; Statement II is correct |
| 2. | Statement I is correct; Statement II is incorrect |
| 3. | Statement I is incorrect; Statement II is correct |
| 4. | Statement I is incorrect; Statement II is incorrect |
1. Sugar
2. Phosphoric acid
3. Nitrogenous base
4. Sugar and nitrogenous base
Which of the following set of molecule show presence of heterocyclic ring?
1. Glucose, Trypsin
2. Glycogen, Lysine
3. Adenine, Guanine
4. Lecithin, Ribose
| 1. | Nitrogen bases such as adenine, guanine, cytosine, uracil, and thymine contain heterocyclic rings. |
| 2. | When a nitrogen base is attached to a sugar molecule, the compound formed is called a nucleoside. |
| 3. | Nucleotides are formed when a nitrogen base is directly esterified to a phosphate group without sugar involvement. |
| 4. | DNA and RNA are nucleic acids, composed exclusively of nucleotides, and can function as genetic material. |
1. Nucleotide
2. Nucleoside
3. Gamma amino acid
4. Phospholipid
Given below is diagrammatic representation of small molecular weight organic compounds in living tissues
Choose the option which is correct identification of structures labelled as 1, 2 and 3
1 2 3
1. Nucleoside Nucleotide Adenine
2. Nucleotide Nucleoside Guanine
3. Nucleoside Nucleotide Guanine
4. Nucleotide Nucleoside Adenine
I: is a substituted purine
II: is a structural component of cholesterol
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
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