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Biology Keystone Exam Review

Biology Keystone Exam Review

Assessment

Flashcard

Biology

9th - 11th Grade

Practice Problem

Hard

Created by

Tonya Everhart

FREE Resource

Student preview

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50 questions

Show all answers

1.

FLASHCARD QUESTION

Front

How does the structure of alveoli allow lungs to function properly?

Back

They increase the surface areas of the lungs, allowing efficient gas exchange.

2.

FLASHCARD QUESTION

Front

Effect of low density of frozen water in a lake?

Back

When water in a lake freezes, it floats, providing insulation for organisms below.

3.

FLASHCARD QUESTION

Front

What functional characteristic of proteins distinguishes them from carbohydrates?

Back

Ability to catalyze biochemical reactions

4.

FLASHCARD QUESTION

Front

The diagram models how a poison bonds to the active site of an enzyme. Which function is the enzyme MOST LIKELY unable to perform because of the attachment of the poison molecule?

Media Image

Back

The catalysis of the reaction with the substrate.

5.

FLASHCARD QUESTION

Front

What happens to the enzyme when the temperature of the reaction increases to 63 degrees?

Media Image

Back

The enzyme changes shape and can no longer speed up the reaction.

6.

FLASHCARD QUESTION

Front

A protein in a cell membrane changed its shape to move sodium and potassium ions against their concentration gradients. Which molecule was MOST LIKELY used by the protein as an energy source?

Back

ATP

7.

FLASHCARD QUESTION

Front

What determines the direction that carbon dioxide and oxygen molecules move across a plasma membrane?

Back

Concentration gradient across the plasma membrane.

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