Which group of the amino acid contributes essentially to the chemical and physical properties of amino acids?
1.Amino group
2.Carboxyl group
3.Alkyl group (R group)
4.All of these
Which of the following is true about Lipids
1.It is a polymer of Fatty acids and Glycerol
2.Water soluble
3.Fatty acids can be saturated or unsaturated
4.both 1 and 3
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 |
Enzymes work at optimum temperature. Over a range of 0 to 400C, what would happen to the rate of enzyme controlled reactions for every 100C rise in temperature?
1. The rate doubles itself
2. Decreases by half
3. No effect
4. First increases then decreases
Which of the following is true about carbonic anhydrase?
1. It accelerates the rate of formation of carbonic acid by 10 million times.
2. In its absence only 200 molecules of carbonic acid is formed in an hour.
3. It forms 600,000 molecules of carbonic acid in one second.
4. All of these
Find the correct statement
1. Catalysed reactions proceed at rates higher than that of uncatalysed ones.
2. In skeletal muscle under anaerobic conditions lactic acid is formed from pyruvic acid.
3. In yeast during fermentation ethanol is formed from pyruvic acid.
4. All of these