Biology Fall 25 Unit 1 TEST Review

Front

What is the pH range of hydrochloric acid?

Back

Hydrochloric acid has a pH of around 1, making it a strong acid.

Front

What should you do first if you get injured in the lab?

Back

Tell the instructor immediately.

Front

Which substance is more acidic than lemon juice?

Back

Hydrochloric acid is more acidic than lemon juice.

Front

What is the strongest acid among the following: oven cleaner, lemon juice, soap, blood?

Back

Lemon juice is the strongest acid with a pH of 2.5.

Front

What do enzymes do to substrates like starch?

Back

Enzymes break down substrates like starch into products.

Front

Why is the water molecule considered polar?

Back

The water molecule is polar because it has a slightly negative charge near the oxygen atom and a slightly positive charge near the hydrogen atoms.

Front

What is the pH of lemon juice?

Back

Lemon juice has a pH of about 2.5.

Front

What is the role of an enzyme in a chemical reaction?

Back

Enzymes act as catalysts to speed up chemical reactions by lowering the activation energy.

Front

What is the significance of a substance having a pH less than 7?

Back

A substance with a pH less than 7 is considered acidic.

Front

What is the pH of neutral substances like water?

Back

The pH of neutral substances like water is 7.