Regents Living Environment 2

Question 1

Which process allows plants to convert light energy into chemical energy stored in glucose?

Accepted Answer

Photosynthesis

Answer

Photosynthesis uses light energy, water, and carbon dioxide to produce glucose and oxygen in chloroplasts.

Question 2

A mutation in a gene that codes for a digestive enzyme causes the enzyme to lose function. Which level of biological organization is most directly affected first?

Accepted Answer

Molecule

Answer

A gene mutation directly alters the molecular structure of the protein (enzyme) it encodes.

Question 3

Which term describes the variety of different species living within a single ecosystem?

Accepted Answer

Biodiversity

Answer

Biodiversity refers to the number and variety of different species found in a given area or ecosystem.

Question 4

A student observes that a bacterial culture doubles in size every 20 minutes. After 1 hour starting with 100 bacteria, how many bacteria are present?

Accepted Answer

800

Answer

In 60 minutes there are 3 doubling periods: 100 → 200 → 400 → 800.

Question 5

Which structure in the cell is responsible for producing ATP through aerobic cellular respiration?

Accepted Answer

Mitochondrion

Answer

The mitochondrion is the site of aerobic cellular respiration, producing most of the cell's ATP.

Regents Practice Test

Regents Practice Test

Regents Living Environment 2