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?

Which of the following is incorrect?

1. Enzymatic activity is maximum at its optimim p^H 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

Which of the following class of enzymes helps in catalysing a transfer of a group (other than hydrogen) between a pair of substrates?

1. Ligases

2. Lyases

3. Transferases

4. Hydrolases