22 Pre-Lab Study Questions
What happens to glucose or galactose when the Cu2+ in
Benedict’s reagent is reduced?
Would you expect fructose or glucose to form a red color rapidly
with Seliwanoff’s reagent? Explain your answer.
Why don’t all the disaccharides undergo fermentation with
yeast?
How can the iodine test be used to distinguish between amylose
and glycogen?
Address the following and Explain:
a) what happens when a strong base is added to a solution that
only has significant amounts of a weak base
b) what happens when a strong base is added to a solution
initially made up of significant amounts of a weak base and its
conjugate acid
1.) Describe what happens when incident light falls on opaque
surfaces.
2.) Describe what happens when incident light falls on
semitransparent surfaces
What happens to plant cells when placed in a hypertonic
solution?
What happens to plant cells when placed in a hypotonic
solution?
What is the purpose of Koehler illumination?
1. What happens to the human being when his/her temperature
drops below 36 and
2. What happens to them when their temperature goes above
49.
3. What changes happen to the human body especially when the
body temperature drops much lower than 34 and much higher than 42
degrees Celsius? (Remember here we are
discussing the internal temperature of the human body and its
effect on their being).
3. Explain what happens to the Lac operon when lactose is
present and glucose is also present. Then explain what happens when
lactose is present but glucose is absent. In your answer, include
all of the components of the Lac operon and the molecules involved
in its regulation. What is the protein product of the Lac operon?
Explain why this mechanism of control is adaptive.
(a) What happens to the concentration of
Cadmium when the pH of a solution increases from 7 to 12? Calculate
the concentration of cadmium in each case. Assume that the
solubility of cadmium is controlled only by hydroxide. The
solubility product constant is as follows:
Cd(OH)2 (s) <--> Cd2+ +
2OH- Ksp= 2x10-14
The national groundwater drinking water standard for cadmium is
0.005 mg/L. (b) What pH will ensure that any
Cadmium in excess of 0.005 mg/L will precipitate out...
Thinking of lactose operon regulation, what happens when E. coli
is grown in medium with glucose and lactose?
Group of answer choices
neither Cap/cAMP activator nor LacI repressor are bound to a
regulatory DNA sequence.
LacI repressor is bound to the OPERATOR sequence but
Cap/cAMPactivator is not.
Cap/cAMP activator is bound to the CAP motif but LacI repressor
is not.
both Cap/cAMP activator and LacI repressor are bound to the
OPERATOR sequence.
Assume you have a bacterium that possesses the lac
operon. What happens when……
Glucose is present, lactose is absent
Describe what is happening to LacI in this situation.
Feel free to use the diagram below to help sketch out what is
happening and help you answer the question.
Describe what is happening to CAP in this situation.
Feel free to use the diagram below to help sketch out what is
happening and help you answer the question.
Are lacZ, lacY...