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Which biological molecule is NOT found in a typical sample of cell membrane?
nucleic acid
when equilibrating, particles tend to move from where they are
more concentrated to where they are less concentrated
Facilitated diffusion
moves substances from high to low concentration and requires a membrane protein
Which biological molecule is NOT found in a typical sample of cell membrane?
nucleic acid
Simple diffusion
requires a membrane protein and moves substances from high to low concentration
Active transport
requires energy to occur, requires a membrane protein, and moves substances from low to high concentration
Osmosis
requires energy to occur, requires a membrane protein, and moves water through a selectively permeable membrane from low to high concentration
When a cell is placed in a hypertonic solution
water exits the cell towards the area of higher solute concentration
Which statement comparing facilitated diffusion to active transport is correct?
Facilitated diffusion moves materials with the concentration gradient while active transport moves materials against the concentration gradient
Which term is used to label plant cells completely full of both water and pressure?
turgid
A substance that needs cellular energy to move across a membrane tends to move
away from the area where it is less concentrated
A beaker is divided into two halves (A and B) by a selectively permeable membrane that allows water to freely go through but stops the glucose from going through. Side A contains a 2% glucose solution and side B contains a 4% glucose solution. Which statement best describes what will happen to the system over time?Â
Water will only move from Side A to Side B
The bursting of cells due to osmosis is called
lysis
When comparing osmosis in plant and animal cells, which statement would be correct?
Animal cells will lyse when placed in a hypotonic solution
Which statement concerning passive and active transport is most accurate?
Active transport does require cell energy and moves materials from low to high concentration.
Which of the following would most likely pass through a phospholipid bilayer the easiest?
oxygen molecules
An animal cell (92/8) is placed in a container with distilled water (100/0). What will happen to this animal cell?
It will lyse.
A plant cell (92/8) is placed in a container with salt water (80/20). What will happen to this plant cell?
It will be plasmolysed.
An animal cell (92/8) is placed in a container with salt water (80/20). What will happen to this animal cell?
It will crenate.
What's the main difference between diffusion and osmosis?
Diffusion moves non-water materials to a lower concentration; osmosis moves water through a membrane to a lower concentration
Which statement concerning passive and active transport is most accurate?
Passive transport doesn't require cell energy and moves materials from high to low concentration.
Why is active transport important to biological systems?
Active transport is the only way biological systems have of maintaining a concentration gradient.