Which of the following is not a steroid? a. insulin b. androgens c. estrogens d. cholesterol e. all of the above are steroids

OptionA, Insulin

Explanation:

Steroids are organic compound having four fused ring arranged in specific configuration. The four fused rings are composed of 17 carbons.

Most common example of steroids includes Cholesterol, steroids hormones and bile salts.

Among given options, all are steroids except insulin.

Insulin is an endocrine hormone and released from pancreas. It is a non-steroid hormone.

Androgens and estrogens are sex hormones whereas cholesterol is a waxy substance present in blood plasma and animal tissues.

b.final

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.