The most abundant element present in human body is

1. Oxygen

2. Carbon

3. Nitrogen

4. Hydrogen

Select the correct arrangement of elements present in human body

1. C>O>H>N

2. C>O>N>H

3. O>C>H>N

4. O>C>N>H

The least abundant element present in human body is
1. Oxygen
2. Carbon
3. Nitrogen
4. Hydrogen

Which of the following element is present in negligible amount in human body?
1. Magnesium
2. Suphur
3. Silicon
4. Sodium

When chemical analysis of living tissue was done using trichloroacetic acid, then inorganic compounds were found to be present in

1. Acid soluble pool

2. Acid insoluble pool

3. Both A and B

4. Cannot be determined

Which of the following is incorrect?

1. Sulphates and phosphates are seen in acid soluble pool

2. Sulphates and phosphates are seen in acid insoluble pool

3. All carbon compounds that we get from living tissue can be called as biomolecules

4. Elemental analysis gives elemental composition of the living tissues.

Which of the following inorganic compound is present in living body?

1. Carbohydrates

2. Proteins

3. Water

4. Lipids

Find the correct statement

1. All the chemical reactions taking place in the body are called metabolism.

2. Each of the metabolic reactions results in the transformation of biomolecules

3. Metabolites are converted into each other in a series of linked reactions called metabolic pathways

4. All of these

Which of the following is correct statement
1. Every chemical reaction of metabolism is a catalysed reaction.
2. There is no uncatalysed metabolic conversion in the living system.
3. The proteins with catalytic power are called as enzymes
4. All of these

CO₂ dissolving in water is a
1. Physical process
2. Catalysed process in living system
3. Chemical process
4. both A and B