Question

1- What is the difference between active and passive transport?

a) Active transport requires energy input, while passive transport does not.
b) Active transport is faster than passive transport.
c) Passive transport moves substances against their concentration gradient, while active transport moves them with the gradient.

2- What is the difference between facilitated and simple diffusion?
a) Facilitated diffusion requires energy, while simple diffusion does not.
b) Facilitated diffusion involves the use of transport proteins, while simple diffusion does not.
c) Simple diffusion is faster than facilitated diffusion.

3- What happens when starch indicator and starch mix?
a) The solution turns blue.
b) There is no change in the solution.
c) The solution turns purple.

4- What happens when starch indicator and glucose mix?
a) The solution turns blue.
b) There is no change in the solution.
c) The solution turns orange.

5- Give examples of the types of molecules that can move through the cell membrane.
a) Small lipids and gases like oxygen and carbon dioxide.
b) Large proteins and nucleic acids.
c) Water-soluble vitamins.

6- Give examples of the types of molecules that cannot move through the cell membrane.
a) Large proteins and nucleic acids.
b) Small lipids and gases like oxygen and carbon dioxide.
c) Water-soluble vitamins.

7- Why do animals have to digest starch into glucose?
a) Starch is toxic to animals.
b) Glucose is a simpler and more readily usable form of energy for cells.
c) Starch cannot be broken down into glucose.

8- Explain what happens to cells in hypertonic, isotonic, and hypotonic solutions.
a) In a hypertonic solution, cells shrink.
b) In an isotonic solution, cells neither swell nor shrink.
c) In a hypotonic solution, cells swell and may burst.

9- What happens to an animal cell when it is placed in distilled water?
a) The cell will burst.
b) The cell will shrink.
c) The cell will remain the same.

10- What will happen to the cells of the elodea plant if it is placed in a solution with high salt concentration?
a) The cells will swell and become turgid.
b) The cells will shrink and plasmolyze.
c) The cells will not be affected.

Answer 1

Active transport requires energy input and can move substances against their concentration gradient, while passive transport does not require energy and moves substances with the concentration gradient. Facilitated diffusion involves transport proteins, while simple diffusion does not.

Step-by-step explanation:

Active transport requires energy input, while passive transport does not. Passive transport moves substances from an area of higher concentration to an area of lower concentration, while active transport can move substances against their concentration gradient. Facilitated diffusion requires the use of transport proteins, while simple diffusion does not. Simple diffusion is the movement of substances from an area of higher concentration to an area of lower concentration, while facilitated diffusion uses carrier proteins to help substances move across the membrane.