Question

The following table describes several molecules and their functions. The molecules all belong to the same class.

Molecule Function
Oleic acid used for energy storage and insulation in whales
Phospholipid component of cell membranes in plants and animals
Brassinosteroid steroid hormone involved in pollen elongation in plants

Which class of biomolecule do the molecules in the table belong to?

A.
carbohydrates
B.
proteins
C.
lipids
D.
nucleic acids

Answer 1

Answer: lipids.

Step-by-step explanation: Oleic acid, phospholipids, and brassinosteroid hormone are an example of lipid. These lipids are found in different organism in different forms and perform different functions.

Lipids can be defined as the non-polar, insoluble organic compounds which includes organic compounds such as triglycerides, phospholipids, natural oils, et cetera.

Oleic acid is a fatty acid that acts as the insulator in the body. Phospholipids acts as the fatty acid of cell membrane.

Brassinosteroieds acts as signalling molecule in plants.

Answer 2

Ans. (C). lipids.

Oleic acid, phospholipids, and brassinosteroid hormone are examples of lipid molecules. Lipids are non-polar, water insoluble organic compounds, which include triglycerides, phospholipids, steroids, and natural oils.

Oleic acid is an example of fatty acid that helps in insulating the body and energy storage. Phospholipids are fatty acid derivatives, which represent major components of cell membranes. Brassinosteroid is a steroid hormone, which acts as a signalling molecule in plants.

Thus, the correct answer is option (C).