Question 1

Which of the following elements is the most abundant in living systems, excluding water?

Accepted Answer

Carbon

Question 2

Organic molecules are defined as chemical compounds that contain which of the following?

Accepted Answer

Carbon and Hydrogen

Question 3

Which of the following is NOT a primary class of biomolecules essential for living organisms?

Accepted Answer

Minerals

Question 4

Which functional group is commonly found in biological molecules and is represented by $$-OH$$?

Accepted Answer

Hydroxyl

Question 5

What is the correct chemical formula for a simple carbohydrate (monosaccharide) such as glucose?

Accepted Answer

$$C_6H_{12}O_6$

Question 6

Which type of reaction links monosaccharides together to form polysaccharides?

Accepted Answer

Dehydration synthesis

Question 7

What type of covalent bond links individual monosaccharides in a polysaccharide?

Accepted Answer

Glycosidic bond

Question 8

Which of the following chemical reactions results in energy release when glycosidic bonds are broken?

Accepted Answer

Hydrolysis reaction

Question 9

Animal cells store energy in the form of ________, while plant cells store energy in the form of ________.

Accepted Answer

Glycogen; starch

Question 10

Which polysaccharide is an important component in the structure of lobsters and insects?

Accepted Answer

Chitin

Question 11

Which process forms covalent bonds to link individual monomers into a polymer, releasing water?

Accepted Answer

Dehydration synthesis

Question 12

Which of the following statements about dehydration reactions and hydrolysis is correct?

Accepted Answer

Dehydration reactions create polymers from monomers; hydrolysis reactions break down polymers.

Question 13

Which functional group is NOT present in the molecule $$\mathrm{HOCH_2CH_2COOH}$$?

Accepted Answer

Amino

Question 14

Which of the following is a correct example of a monomer-polymer relationship?

Accepted Answer

Amino acid : Protein

Question 15

Which of the following is NOT a function of carbohydrates in living organisms?

Accepted Answer

Catalyzing chemical reactions

Question 16

Which of the following is a correct formula for a carbohydrate based on the general formula $$C_n(H_2O)_n$$?

Accepted Answer

$$C_6H_{12}O_6$

Question 17

Which of the following is a polymer made up of amino acid monomers?

Accepted Answer

Protein

Question 18

Which functional group is commonly found in nucleic acids and is represented by $$-PO_4$?

Accepted Answer

Phosphate

Question 19

Which of the following best describes the role of glycosidic bonds in polysaccharides?

Accepted Answer

They link monosaccharides together.

Question 20

Which of the following is a real-world example of a polysaccharide used for energy storage in animals?

Accepted Answer

Glycogen

Kari

Study Guide - Practice Questions