Sloping the machine:
sets the point of 0 % Transmission
If a sample shows a high O.D. reading, the % Transmission will probably be:
low
Peak absorbance of a compound is the wavelength of light that:
is most readily absorbed
The larger the mass of a molecule
the slower it moves
Molecules move the most freely in
gases
Diffusion is a process where particles move
from high to low concentration
Brownian movement occurs as a result of
water molecules colliding with small particles
After diffusion has reached equilibrium, movement of molecules
continues
Osmosis is the passage of
a fluid or solvent througha semipermeable membrane
In dialysis:
dissolved substances pass through a semi permeable membrane
What material is used to demonstrate the diffusion of a gas
NH4OH
The quantity of enzyme at the beginning and end of a reaction is:
does not change
Enzymes react with a molecule called:
substrate
Amylase reacts with starch and converts it into:
disaccharides
What is the role of amylase in the experiment on the effect of temperature on enzyme activity?
enzyme
What is the role of iodine in the experiment on the effect of temperature on enzyme activity?
indicator
Enzymes are composed of
at least in part of protein
In a given biochemical reaction:
only 1 enzyme can be used
What is the role of starch in the experiment on the effect of temperature on enzyme activity?
substrate
In mitosis, what is the chromosome number in the daughter cells in relation to those found in the parent cell?
same
In interphase I of meiosis
DNA is duplicated
A pair of chromatids is called
dyad
In what phase do the spindle fibers form and the nucleolus disappears?
prophase
When chromosome material is dispersed it is called
chromatin
Species are determined by
the nature of the heredity material (the information contained)
Crossing-over occurs in
prophase I
The number of chromosomes in a somatic cell is
diploid
If q = 0.6, what is the frequency of the dominant allele?
.4
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