What group of organic molecules is made up of a sequence of an amion group, a carboxyl group, a hydrogen atom and a side chain bonded to the central carbon atom? a. proteins b. carbohydrates c. nucleic acids d. lipids

Option A, Proteins

Explanation:

Proteins (Amino acids) consists of one alpha carbon with a valency of four, thus it needs to form four bonds to become a stable molecule.

Thus, protein bonds to the following-

a) A R - group which is nothing but a long molecular chain of carbon, hydrogen or oxygen

b) A carboxyl group

c) A hydrogen atom

and

d) An amino group.

Thus, option A is correct.

answer; hypnagogic sensations)

the correct answer is - d. china has a large and growing population.

the fact that china has a large (the biggest) population, and it is still growing, doesn't hinder the agriculture production in the country. in fact, it can for increased production in the agriculture, since there's more labor force, as well the sheer mass of people produces lots of scientists that come up with new inventions as to how to improve this sector. nice example is the inner mongolia region in china, in general dominated by the gobi desert, but few scientist came up with a nice idea as to how to make the region productive by using plants that are very resistant to droughts, so lots of people have been employed, and the region is becoming greener and greener each year, and the production of food in this region is also increasing.