Question 1

Which property of carbon allows it to form large and diverse organic molecules essential for life?

Accepted Answer

Its ability to form four covalent bonds with other atoms

Question 2

Which of the following best describes a hydrocarbon?

Accepted Answer

A compound containing only carbon and hydrogen

Question 3

Isomers are molecules that:

Accepted Answer

Have the same chemical formula but different connectivity

Question 4

Which functional group is non-polar and non-reactive, but still affects molecular shape and function?

Accepted Answer

Methyl group

Question 5

A molecule with the formula $$C_6H_{12}O_6$ is most likely a:

Accepted Answer

Monosaccharide

Question 6

Which reaction links monomers together to form polymers in biological systems?

Accepted Answer

Dehydration reaction

Question 7

Which of the following statements about cellulose is TRUE?

Accepted Answer

It is a structural polysaccharide found in plant cell walls

Question 8

What is the main reason unsaturated fats are liquid at room temperature?

Accepted Answer

Their double bonds create kinks that prevent tight packing

Question 9

Phospholipids are essential for cell membranes because:

Accepted Answer

They form a bilayer with hydrophilic heads facing water and hydrophobic tails facing inward

Question 10

Which of the following is a function of proteins in living organisms?

Accepted Answer

Catalyzing chemical reactions as enzymes

Question 11

A peptide bond is formed between:

Accepted Answer

The carboxyl group of one amino acid and the amino group of another

Question 12

Which of the following best explains why enzymes are specific to their substrates?

Accepted Answer

The active site of the enzyme has a unique shape that fits only specific substrates

Question 13

What is the effect of a competitive inhibitor on enzyme activity?

Accepted Answer

It competes with the substrate for the active site, reducing enzyme activity

Question 14

Which of the following is TRUE about feedback inhibition?

Accepted Answer

It prevents the overproduction of products by inhibiting an enzyme in the pathway

Question 15

Which of the following is a correct description of the dehydration reaction?

Accepted Answer

It removes water to join two monomers together

Question 16

Which functional group acts as a base by picking up $$H^+$$ from solution?

Accepted Answer

Amino group

Question 17

Which of the following statements about DNA is correct?

Accepted Answer

DNA is double stranded and contains thymine

Question 18

A triglyceride is formed by joining:

Accepted Answer

Three fatty acids and one glycerol via dehydration reactions

Question 19

Which of the following best describes the role of enzymes in chemical reactions?

Accepted Answer

They lower the activation energy, speeding up the reaction

Question 20

Which of the following is a real-world consequence of anabolic steroid overdose?

Accepted Answer

Liver damage and cardiovascular problems

Chemical Reactions and Organic Chemistry: Structure and Function of Biological Molecules

Study Guide - Practice Questions