Diffusion + Osmosis
The diffusion of water is called
What is osmosis?
Which of the following is not a form of passive transport?
- osmosis, diffusion, phagocytosis
What is phagocytosis?
True or false, enzymes denature at low temperatures
What is false?
What are the two primary MACROMOLECULES that make up the cell membrane?
What are phospholipids and proteins?
The equation for the surface area to volume ratio of a cell
what is the surface area divided by the volume?
The state of steady internal, physical, and chemical conditions maintained by living systems.
what is homeostasis?
A cell with a 1M concentration of salt is placed in distilled water. The outside environment is ______ to the cell
hypotonic
List two conditions that affect enzyme activity
What are temperature and pH?
A phospholipid has two parts with different tendencies in water, they are the hydro-____ ______ and the hydro-_____ _____
What are the hydrophilic head and hydrophobic tail?
During active transport, molecules move in this direction across the membrane
What is from low to high concentration?
What is higher?
Which of the following has a higher concentration gradient?
.2M cell in a .8M beaker
.1M cell in a .1 molar beaker
.3M cell in a .1M beaker
What is the .2M cell in a .8M beaker?
Enzymes do not operate well at low temperatures because
What is the movement of molecules decreases, so they likelihood of a collision between enzyme and substrate decreases
The quality of the cell membrane that is such that only certain things can pass through
What is semi-permeable?
Which of the following "cells" would be best equipped to get rid of waste?
- Volume of 40, SA of 100
- Volume of 40, SA of 40
- Volume of 40, SA of 12
What is Volume of 40, SA of 100?
Which of the following scenarios would be most affected if a cell system could not make ATP?
- water moving out of a gummy bear in a .4M saltwater solution
- sugar moving from a .1M conc. to distilled water
- sugar moving from a .1M conc. to a .3M conc. solution
What is sugar moving from a .1M conc. to a .3M conc. solution?
3 different cells all with .3M conc. of salt are placed in 3 different solutions
- .1M conc.
- .5M conc.
- distilled water.
Which cell would gain the most mass over the course of 24 hours?
What is the one in distilled water?
Enzymes speed up the overall rate of reaction by
What is lowering the activation energy?
These types of molecules move easily through a membrane - name 2 features
What is small and non-polar?
How does the concentration of a substrate affect the rate of reaction?
What is the reaction rate will increase with an increase of substrate until all of the active sites are filled-then the reaction rate will level off?