Biology Practice (cell Transport) Question Preview (ID: 35314)
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A freshwater plant is placed in a container of saltwater. What will most likely happen to the cells of the plant?
a) They will swell because water will move into them.
b) They will swell because salt will move into them.
c) They will shrink because water will move out of them.
d) They will shrink because salt will move out of them.
If energy is needed to move materials into or out of a cell, what is most likely occurring?
a) active transport
b) passive transport
c) osmosis
d) diffusion
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 rapidly across the cell membrane.
b) ATP is being rapidly consumed near the cellular membrane.
c) Substances are moving from high to low concentrations.
d) Substances are moving through channels in the cell membrane.
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 works against gravity (for example, upwards from the roots of a tree); passive transport works with gravity
c) Passive transport does not require any cellular proteins; active transport requires cellular proteins.
d) Active transport requires cellular energy for substances to cross the cell membrane; passive transport does not.
All of the following are types of passive transport except
a) diffusion
b) osmosis
c) facilitated diffusion
d) endocytosis
What is the role of ATP in the process of active transport?
a) It lengthens the fatty acid chains in the membrane.
b) It provides the energy that cells need to move molecules against a concentration gradient.
c) It provides the energy to transport the cell in its environment.
d) It weakens the membrane, allowing molecules to pass through more easily.
Which of the following is an example of osmosis?
a) Intestinal cells use osmosis to absorb nutrients from food
b) A plant's roots use osmosis to absorb water from the soil.
c) The human body uses osmosis to move antibodies out of cells.
d) A single-celled organism uses osmosis to take in food particles.
In facilitated diffusion, what are the special channels that help substances cross the cell membrane made of?
a) proteins
b) carbon bonds
c) nucleic acids
d) water molecules
Which statement is true regarding active transport?
a) Substances can move from areas of low concentration to areas of high concentration
b) Substances do not require additional energy to move in and out of cells.
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.
What causes the diffusion process to stop?
a) The concentration of materials outside the cell becomes greater than the concentration of materials inside the cell.
b) The concentration of materials inside the cell becomes greater than the concentration of materials outside of the cell.
c) The concentration of materials cannot be changed because ATP is no longer available
d) The concentration of materials inside and outside the cell becomes equal.
In general, in what direction does a diffusing substance move?
a) up its concentration gradient
b) in the opposite direction than it would normally move
c) down its concentration gradient
d) it depends on the substance being diffused
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) water will move into the cell
b) sugar will move out of the cell
c) sugar will move into the cell
d) water will move out of the cell
A red blood cell is placed in an isotonic solution. What will most likely happen to the blood cell?
a) Water will exit and enter the cell at a constant rate.
b) Water will enter the cell, causing it to swell
c) Water will stop moving in and out of the cell.
d) Water will exit the cell, making it shrink
Diffusion does not require the cell to expend ATP. Therefore, diffusion is considered a type of
a) passive transport
b) exocytosis
c) active transport
d) endocytosis.
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) semi-permable
b) perforated
c) non-conductive
d) permeable
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) homeostasis
b) evolution
c) diffusion
d) respiration
Why could drinking saltwater instead of freshwater be dangerous to humans?
a) Saltwater is hypertonic relative to human tissue.
b) Saltwater is too acidic.
c) Saltwater is isotonic relative to human tissue
d) Saltwater is hypotonic relative to human tissue.
Which of the following is essential for diffusion to occur?
a) a concentration gradient
b) a source of energy
c) a permeable membrane
d) a protein substance
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) exocytosis
c) osmosis
d) endocytosis
Which statement about diffusion is true?
a) Diffusion happens when molecules move from a high concentration to a low concentration
b) Diffusion happens when molecules move from a low concentration to a high concentration
c) During diffusion, molecules move only in one direction.
d) energy is required for molecules to move across a membrane
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