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

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 then filtrate formed was

1.acid insoluble fraction

2.acid soluble fraction

3.retentate

4.Both 1 and 3

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 1 and 2

Which of the following is true?

1.The conversion of acetic acid to cholesterol is an anabolic process.

2.The conversion of glucose to lactic acid is a catabolic process.

3.The conversion of acetic acid to cholesterol is a bio-synthetic pathway

4.All of these