Zoology MCQs for NEET — Practice Questions with Answers

Steroids are a class of organic compounds that include hormones and other substances. Cortisone, Progesterone, and Ergosterol are all steroids. However, Glycolipids are not steroids; they are compounds made of carbohydrates and lipids. Therefore, the statement that Glycolipid is a steroid is incorrect.

Starch is a polysaccharide made up of amylose and amylopectin chains, and it is the stored form of energy in plants. Starch is generally not soluble in cold water, which makes the statement that it is soluble in water incorrect. Therefore, option o3 is the correct choice as it is not a true property of starch.

Cortisone is actually a steroid hormone, not a sterol. Sterols are a subgroup of steroids and include substances such as cholesterol. Therefore, the pair 'Cortisone – sterols' is not correctly matched.

Lipids are hydrophobic molecules and are relatively insoluble in water due to their nonpolar nature. They are, however, soluble in organic solvents such as chloroform, benzene, and ether. Therefore, lipids are relatively insoluble in water.

Saturated fatty acids are not capable of accepting hydrogen or halogen atoms because they do not have double bonds. They are fully 'saturated' with hydrogen atoms, meaning all carbon atoms are single-bonded to hydrogen atoms. Hence, they cannot accept more hydrogen or halogen atoms.

Lipids are formed of carbon (C), hydrogen (H), and oxygen (O) atoms, but the number of hydrogen atoms is usually much greater than the number of oxygen atoms. This statement is incorrect: 'The number of H atom is less than that of O.'