Biology semester 1 review

Front

What is a concentration gradient?

Back

The difference in the concentration of a substance from one place to another.

Front

What is the main product of the endocrine system?

Back

Hormones.

Front

What enzyme unzips DNA during replication?

Back

Helicase.

Front

Which of the following is not a DNA base: adenine (A), guanine (G), cytosine (C), or histidine (H)?

Back

Histidine (H) is not a DNA base.

Front

What is the primary function of leaves in a plant?

Back

They make the food for the plant through photosynthesis.

Front

Define diffusion.

Back

The movement of molecules from an area of higher concentration to an area of lower concentration.

Front

What is osmosis?

Back

The diffusion of water across a selectively permeable membrane.

Front

What role do enzymes play in biological reactions?

Back

Enzymes act as catalysts to speed up chemical reactions in the body.

Front

What is the function of DNA polymerase?

Back

DNA polymerase is an enzyme that synthesizes new DNA strands during replication.

Front

What are the four main bases of DNA?

Back

Adenine (A), Thymine (T), Cytosine (C), and Guanine (G).