Lipid are found in acid insoluble fraction during the analysis of chemical composition of tissues. Given the reason

When we grind a tissue, we are distrupting the cell structure Cell membrane and other membranes are broken into pieces and form vesicles which are not water soluble. Therefore, these membrane fragments in the form of vesicles get separated along with the acid insoluble pool and hence, in the macromolecular fraction. Lipids are not strictly macromolecules

It has very high molecular weight

The correct Option is "On grinding, the biomembranes are broken into pieces and form insoluble vesicles"

Choose the element which is negligible in living matter

Silicon is almost negligible in living organism. A comparison of elements present in non-living and living matter is as follows *Adapted from CNR Rao, Understanding Chemistry Universities Press Hyderabad

Name the plant pigments present in the following I. Carrots II. Tomatoes

(i) Carrots – Carotene (ii) tomatoes – Lycopene

The correct Option is "I-Carotene II-Lycopene"

Which one of the following structural formulae of two organic compounds is correctly identified along with its related function?

Lecithin is a phospholipid composed of choline and inositol. It is found in all living cells as a major component of cell membrane.

A- Triglyceride major-Source of energy

The correct Option is "A-Lecithin -A component of cell membrane"

B-Adenine -A nucleotide that makes up nucleic acids

The central core of silk fibre is made up of fibroin protein. Silk fibres are soft and flexible. These are composed of β-pleated sheets.

The correct Option is "Central core of fibroin"

A fine mixture of fibroin and sericin

Which statement regarding coenzyme is incorrect?

Every coenzyme is a cofactor but every cofactor is not coenzyme.

The correct Option is "Every coenzyme is a cofactor and every cofactor is a coenzyme"

Every coenzyme is a cofactor but every cofactor is not a coenzyme

Most of the coenzymes are nucleotides and are composed of vitamins

Coenzymes are the active constituents of enzymes

The rate of the reaction doubles or decreases by half, for every… °C change in either direction

The rate of reaction doubles are decreases by half for every 10℃ change in either direction

The correct Option is "${10^0}$"

Enzyme often have additional parts in their structures that are made up of molecules other than proteins. When this additional chemical part is an organic molecule, it is called

Special non-protein molecules are called cofactors. These help enzymes to catalyze chemical reactions. Organic cofactors are called coenzymes.

The correct Option is "Coenzyme"

Which one is imino acid?

There are 20 different amino acids. In proline and hydroxyl proline instead of $ - {\rm{N}}{{\rm{H}}_2}$ group, NH group is present. These are called imino acids. Methionine and cysteine are sulphur containing amino acids.