QUESTION 1. Which of the following is not an example of a polymer?

APlastic
BNylon
CAmino acid
DPolystyrene

QUESTION 2. A carbon atom is able to form four single covalent bonds because it

Ahas four electrons and four protons.
Bhas four valence electrons in its outermost energy level.
Cforms a polyatomic ion with a -4 charge.
Dforms a more stable isotope when it gains four more electrons.

QUESTION 3. An organic compound that contains a carbonyl group with a hydroxyl group attached to it is an example of a(n)

Aester.
Balcohol.
Camine.
Dcarboxylic acid.

QUESTION 4. All of the following release carbon into the atmosphere except the

Acombustion of fossil fuels.
Bcellular respiration of plants and animals.
Cburning of trees in deforestation.
Dsedimentation of dead organisms.

QUESTION 5. What group of organic compounds has a hydroxyl group -O-H attached to a carbon atom?

AAlcohols
BAmines
CEthers
DKetones

Amino acid  is not an example of a polymer.its an monomer whereas
polymer is made up of repeating subunit and is a large molecule and chemical bond exist
so i think option C is correct for the first
2-
A carbon atom is able to form four single covalent bonds because   it has four valence electrons in its outermost energy level or outermost shell so to complete its octate it forms four singl covalent bond
3-An organic compound that contains a carbonyl group with a hydroxyl group attached to it is an example of carboxylic acid
4- All of the following release carbon into the atmosphere except the
sedimentation of dead organisms.so in my opinion its the correct one
5-Alcohols  has a hydroxyl group -O-H attached to a carbon atom
so i conclude option A is correct for last one

hope it helps