The six most common atoms in organic molecules are:
1. | Carbon, Hydrogen, Oxygen, Helium, Calcium and Sulphur |
2. | Carbon, Hydrogen, Oxygen, Calcium, Magnesium and Sulphur |
3. | Carbon, Oxygen, Nitrogen, Sulphur, Phosphorous and Magnesium |
4. | Carbon, Hydrogen, Oxygen, Nitrogen, Phosphorous and Sulphur |
The unique properties of each amino acid are determined by its particular:
1. R group
2. Amino group
3. Kinds of peptide bonds
4. Number of bonds to other amino acids
Given below is the graph showing the effect of substrate concentration on enzyme activity. In the presence of a competitive inhibitor, when the concentration of the substrate is progressively increased:
1. | The Km value increases but the reaction will not achieve Vmax |
2. | The Km value increases but the reaction can ultimately achieve Vmax |
3. | The Km value decreases but the reaction will not achieve Vmax |
4. | The Km value decreases but the reaction can ultimately achieve Vmax |
The compound shown below:
1. is a component of the ATP molecule
2. is most commonly found in ori region of DNA
3. can have enzymatic activity
4. may be a component of the cell membrane
The zwitterion is shown by:
1. Only A
2. Only B
3. Both A and C
4. A, B and C
Consider the following statements:
I: | There is no uncatalysed metabolic conversion in living systems. |
II: | The living state is a non-equilibrium steady state to be able to perform work. |
III: | The living state and metabolism are synonyms, without metabolism there cannot be a living state. |
Which of the above statements are true?
1. I and II only
2. I and III only
3. II and III only
4. I, II and III
Match each item in Column I with one item in Column II and chose your answer from the codes given below:
Column I (Type of secondary metabolite) |
Column II (example) |
I. Alkaloid II. Toxin III. Lectin IV. Drug |
1. Abrin 2. Morphine 3. Vinblastin 4. Concanavalin A |
Codes
I II III IV
1. 1 2 3 4
2. 2 1 4 3
3. 2 1 3 4
4. 1 2 4 3
Match each item in Column I with one item in Column II and chose your answer from the codes given below:
Column I Column II
(Amino Acid) (Nature)
I. Tryptophan 1. Sulfur-containing
II. Cysteine 2. Aromatic
III. Valine 3. Basic
IV. Lysine 4. Neutral
Codes:
I II III IV
1. 1 2 3 4
2. 2 1 4 3
3. 2 1 3 4
4. 1 2 4 3
Which of the following biomolecules does have a phosphodiester bond?
(1) Fatty acids in a diglyceride
(2) Monosaccharides in a polysaccharide
(3) Amino acids in a polypeptide
(4) Nucleic acids in a nucleotide
A non-proteinaceous enzyme is
(1) lysozyme
(2) ribozyme
(3) ligase
(4) deoxyribonuclease