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Biology Practice (cell Transport)
Test Description: Practice
Instructions: Answer all questions to get your test result.
1) A freshwater plant is placed in a container of saltwater. What will most likely happen to the cells of the plant?
A
They will shrink because water will move out of them.
B
They will swell because water will move into them.
C
They will swell because salt will move into them.
D
They will shrink because salt will move out of them.
2) If energy is needed to move materials into or out of a cell, what is most likely occurring?
A
active transport
B
osmosis
C
diffusion
D
passive transport
3) Which would be the best evidence that a cell is using active transport to move a substance across its cell membrane?
A
Substances are moving from high to low concentrations.
B
Substances are moving rapidly across the cell membrane.
C
ATP is being rapidly consumed near the cellular membrane.
D
Substances are moving through channels in the cell membrane.
4) What is (are) the main difference(s) between passive transport and active transport?
A
Passive transport occurs primarily in single-cell organisms; active transport occurs primarily in multi-cellular organisms.
B
Active transport requires cellular energy for substances to cross the cell membrane; passive transport does not.
C
Active transport works against gravity (for example, upwards from the roots of a tree); passive transport works with gravity
D
Passive transport does not require any cellular proteins; active transport requires cellular proteins.
5) All of the following are types of passive transport except
A
diffusion
B
endocytosis
C
osmosis
D
facilitated diffusion
6) What is the role of ATP in the process of active transport?
A
It weakens the membrane, allowing molecules to pass through more easily.
B
It lengthens the fatty acid chains in the membrane.
C
It provides the energy that cells need to move molecules against a concentration gradient.
D
It provides the energy to transport the cell in its environment.
7) Which of the following is an example of osmosis?
A
A plant's roots use osmosis to absorb water from the soil.
B
The human body uses osmosis to move antibodies out of cells.
C
A single-celled organism uses osmosis to take in food particles.
D
Intestinal cells use osmosis to absorb nutrients from food
8) In facilitated diffusion, what are the special channels that help substances cross the cell membrane made of?
A
nucleic acids
B
water molecules
C
proteins
D
carbon bonds
9) Which statement is true regarding active transport?
A
Substances do not require additional energy to move in and out of cells.
B
Substances can move from areas of low concentration to areas of high concentration
C
Substances can only move across the cell membrane if they are water soluble.
D
Substances can only move into cells, not out of cells.
10) What causes the diffusion process to stop?
A
The concentration of materials inside and outside the cell becomes equal.
B
The concentration of materials inside the cell becomes greater than the concentration of materials outside of the cell.
C
The concentration of materials outside the cell becomes greater than the concentration of materials inside the cell.
D
The concentration of materials cannot be changed because ATP is no longer available
11) In general, in what direction does a diffusing substance move?
A
down its concentration gradient
B
up its concentration gradient
C
in the opposite direction than it would normally move
D
it depends on the substance being diffused
12) Which of the following will happen to a cell If the concentration of a sugar solution is lower outside the cell than inside the cell?
A
sugar will move into the cell
B
sugar will move out of the cell
C
water will move into the cell
D
water will move out of the cell
13) A red blood cell is placed in an isotonic solution. What will most likely happen to the blood cell?
A
Water will stop moving in and out of the cell.
B
Water will enter the cell, causing it to swell
C
Water will exit the cell, making it shrink
D
Water will exit and enter the cell at a constant rate.
14) Diffusion does not require the cell to expend ATP. Therefore, diffusion is considered a type of
A
passive transport
B
endocytosis.
C
active transport
D
exocytosis
15) The cell membrane of a red blood cell will allow water, oxygen, carbon dioxide, and glucose to pass through. Since other substances are blocked from coming in, this membrane is
A
permeable
B
perforated
C
semi-permable
D
non-conductive
16) Cells use passive and active transport to move materials across the cell membrane to keep a constant internal environment. What is this process called?
A
diffusion
B
evolution
C
respiration
D
homeostasis
17) Why could drinking saltwater instead of freshwater be dangerous to humans?
A
Saltwater is too acidic.
B
Saltwater is isotonic relative to human tissue
C
Saltwater is hypotonic relative to human tissue.
D
Saltwater is hypertonic relative to human tissue.
18) Which of the following is essential for diffusion to occur?
A
a permeable membrane
B
a concentration gradient
C
a source of energy
D
a protein substance
19) What is known as the net movement of any type of molecule from a region of higher concentration to a region of lower concentration?
A
diffusion
B
endocytosis
C
exocytosis
D
osmosis
20) Which statement about diffusion is true?
A
energy is required for molecules to move across a membrane
B
Diffusion happens when molecules move from a high concentration to a low concentration
C
During diffusion, molecules move only in one direction.
D
Diffusion happens when molecules move from a low concentration to a high concentration
*select an answer for all questions
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