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?

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

Which of the following describes the given graph correctly?    

1. Endothermic reaction with energy A in presence of enzyme and B in absence of enzyme

2. Exothermic reaction with energy A in presence of enzyme and B in absence of enzyme

3. Endothermic reaction with energy A in absence of enzyme and B in presence of enzyme

4. Exothermic reaction with energy A in absence of enzyme and B in presence of enzyme

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