Midterm question Flashcards
Scientific method
A series of steps designed to help you solve problems nd answer questions
A system that resists changes in pH when acid or base is added
Buffer system
Iodine
Starch
Bioret reagent
Proteins
Benedict Reagent
simple sugars
Brown Paper
Lipids
in diffusion and osmosis molecules move from
Higher to lower concentrations
Which is an example of osmosis
movement of water molecules
Which of these does require energy
Active transport
Because the cell membrane allows some molecules to pass through it but does not others, it is said to be
Selective permeable
which of the followings is a function of the cell membrane?
Regulates the movement of material into and out of the cell
cell membranes are constructed mainly of
phospholipid bilayers
In the lab, the dialysis tubing bag represented
Plasma membrane
What are the factors that affect the permeability of substances across the plasma membrane?
size of molecules, change, polarity
What structure do plant cells have that animals cells do not that keeps them from bursting in a hypotonic solution?
cell wall
If the ocular is 10x and the objective is set 40x, then what is the total magnification of the microscope?
400x
Which of the following may be found in eukaryotic cells but not in bacteria?
nucleus
large numbers of ribosomes are present in cells that specialize in producing which of the following molecules
proteins
The liver involved in detoxification of many poisons and drugs. which of the following structures is primarily involved in this process and therefore abundant in liver cells.
Smooth ER
Which organelle would you expect to find in plant cells but not in animal cells
Chloroplast
How does an enzyme work to catalyze a reaction
it supplies the energy to speed up a reaction
in enzyme-catalyzed reactions, the substrate binds to a very specific site of the enzyme, called
active site
Enzymes are composed of what organic molecule?
proteins
When an enzyme loses its structure and becomes non-functioning, it is said to be
denatured
Enzymes are very specific for the substrate to which they bind. True or false?
True
