Which of the following is true about Cholesterol?
1. It contains four fused hydrocarbon rings
2. Organic molecule
3. Hydroxyl group is present
4. All of these
Which of the following is incorrect.
1.Nucleotides- Nucleosides = phosphate
2.Nucleosides + Phosphate = Nucleotides
3.Nucleosides – Nucleotides = Phosphate
4.Both 1 and 2
Which of the following is true?
1. All the elements present in a sample of earth’s crust are also present in a sample of living tissue
2. Carbon and Hydrogen are present in more amount in any living organism than earth’s crust.
3. Carbon and Hydrogen are present in more in living organisms than in non living matter.
4. All of the above
Which of the following element is present in negligible amount in human body?
1. Magnesium
2. Suphur
3. Silicon
4. Sodium
Which of the following is true?
1. | Inorganic catalyst work efficiently at high temperatures and high pressures |
2. | Generally, enzymes get damaged at high temperatures |
3. | Thermostable enzymes retain their catalytic power even at high temperatures. |
4. | All of these |
Which of the following is incorrect?
1. Enzymatic activity is maximum at its optimim pH and temperature.
2. Enzymatic activity declines both below and above the optimum value.
3. Low temperatures destroys enzymatic activity
4. High temperatures destroys enzymatic activity
The competitive inhibitor of enzyme succinic dehydrogenase is
1. succinate
2. malonate
3. malate
4. mannose
Which of the following class of enzyme is used for catalysing hydrolysis of ester, ether, peptide bonds?
1. Lyases
2. Ligases
3. Hydrolases
4. Both A and B
Which of the following class of enzyme catalyse the linking together of 2 compounds?
1. Lyases
2. Ligases
3. Hydrolases
4. Transferases
Which of the following class of enzyme catalyse the joining of C-O and hydrolysis of C-N bonds respectively?
1. Lyases and Ligases
2. Ligases and Lyases
3. Ligases and Hydrolases
4. Lyases and Hydrolases