AP Biology Unit 2 Review

AP Biology Unit 2 Review

Assessment

Flashcard

Biology

12th Grade

Hard

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15 questions

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1.

FLASHCARD QUESTION

Front

What are channel proteins and their role in facilitated diffusion?

Back

Channel proteins are integral membrane proteins that form tunnels through which specific molecules can passively diffuse across the cell membrane during facilitated diffusion.

2.

FLASHCARD QUESTION

Front

Define osmosis in the context of cellular membranes.

Back

Osmosis is the passive diffusion of water molecules across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

3.

FLASHCARD QUESTION

Front

What is active transport and how does it differ from passive transport?

Back

Active transport is the movement of molecules across a cell membrane against their concentration gradient, requiring energy in the form of ATP, unlike passive transport which does not require energy.

4.

FLASHCARD QUESTION

Front

Describe the function of vacuoles in a cell.

Back

Vacuoles are membrane-bound sacs within a cell that store water, nutrients, and waste products, helping to maintain cellular homeostasis.

5.

FLASHCARD QUESTION

Front

What does the term 'fluid mosaic model' refer to in cell biology?

Back

The fluid mosaic model describes the structure of the cell membrane as a dynamic and flexible arrangement of various proteins and lipids that move laterally within the layer.

6.

FLASHCARD QUESTION

Front

Explain the significance of selective permeability in cell membranes.

Back

Selective permeability allows the cell membrane to regulate the entry and exit of substances, maintaining homeostasis and allowing the cell to control its internal environment.

7.

FLASHCARD QUESTION

Front

What is the role of ATP in cellular processes?

Back

ATP (adenosine triphosphate) serves as the primary energy currency of the cell, providing energy for various cellular processes, including active transport and metabolic reactions.

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