October 7th, 8th, 2014
Bell Ringer: These questions were missed the most on the test.
1. Breaking which type of bond would require the most energy? (A.5.c)
A)covalent B) electrostatic C) hydrogen D) intermolecular
2. What is the primary factor that determines the polarity of a bond
between atoms? (A.5.c) 7)
A) the total number of electrons involved in the bond
B) the total number of protons and neutrons in both atoms
C) the difference in the relative attraction of electrons to each atom
D) the difference in the relative attraction of protons to each atom
3. Methane (CH4), oxygen (O2), and nitrogen (N2) are gases at room
temperature. Water (H2O) has a similar molar mass to these molecules.
Why is H2O a liquid at room temperature while CH4, O2, and N2 are
not? (A.5.i)
A) H2O has a lower viscosity
B) H2O has a lower boiling point
C) Adjacent H2O molecules form hydrogen bonds
D) Nonpolar covalent bonds hold more H2O molecules together
4. In this series of metabolic reactions, Compound R is converted into
Compound A, and Enzyme X then catalyzes the conversion of
Compound A into Compounds B and D. Compound B is converted to
Compound C.
Assume that Compound C inhibits Enzyme X and that Compound C is
not consumed in a subsequent reaction. As the concentration of
Compound C increases, the rate of production of which compound is
LEAST likely to decrease? (A.5.h)
A) A
B) B
C) C
D) D
DLT’s: Unit 2 Biochemistry 1-11.
Today:
1. Biochemistry test corrections
a. You will need to make up the test if you have not yet
taken it.
b. You will get ½ point back on each question you
correct.
c. Make sure you turn your answer sheets back in if
you want your corrections counted.
2. Outline and Rubric for Mealworm lab reports
a. You will use the “Outline for Lab Reports” and
“Rubric for Lab Reports” handout to begin working
on your lab report over your mealworm data.
b. Lab Reports are due Wednesday, October 15th for A
day, and Thursday, October 16th for B day.
c. Notice that this lab report is worth 100 points for
your grade, and is due before fall break!
3. Mid-terms into student folders (if time)-
The Meal Worm Experiment
Complete the LAB REPORT
A. TITLE:
The Effects of _____________ on the growth of mealworms.
B. PURPOSE: To test the effects of _______________ on the growth of mealworms.
C. HYPOTHESIS: IF__________________________________________________________________
THEN_______________________________________________________________________
D. What is your independent (manipulated) variable?__________________________
E. What are your dependent (responding) variables?__Mealworm growth____________
F. What is your control group?_____________________________________________
G. What are your constants?___________________________________________________
H. MATERIALS (List):

4 clear cups

tape

Cereal (food)

Mealworms (3 for control group

2 Sponge cubes

water


2 Paper clips


and 3 for experimental group)


I. PROCEDURES (List, detailed and anyone can repeat it):

Get four clear cups

Crush up cereal (or food) to put in cups

Poke two holes in sides of top cups

Straighten a paper clip, put sponge on paper clip, and put in holes in top cup

Add water to sponge

Weigh mealworms (in grams) from each group to get mean mass for day 0

Measure mealworms (in cm) from each group to get mean length for day 0

Add mealworms to cups (making sure you keep the controls and experimentals separated)
o Add top cup to bottom cup and tape shut (make sure you have holes in the top cup for
air flow)



Keep mealworms in designated spot and check every other day to record data
Lab Report Example:
The effect of room temperature vs. refrigerated meal worm growth
Introduction: In this experiment we are testing to see if meal worms will grow better in the room
temperature or better in the refrigerator. My hypostasis is that the meal worms will grow better in the
refrigerator. I believe this because when you go to the store, their worms/meal worms are in refrigerators.
Also meal worms like cooler areas because they are cold-blooded. So they try and stay cool. Our meals worms
where stored inside Mrs. Reeves room and her refrigerator. There were ten total meal worms in our
experiment. We received them from Mrs. Reeves. They cups of meal worms were fed oatmeal.
Procedure: Our first step was to crush up 2 cups full of oatmeal. The oatmeal will be the meal worm’s
food. After we filled the cups up with the oatmeal, we took a paper clip. We opened it up all flat; we then
poked ends of the paper clips into the top of the cup. Then we wet a sponge, and then slide the sponge on to
the paperclip. That will act as a source of water for the meal worms. We then picked out 5 meal worms for
each cup. After the worms were chosen we measured the length (in centimeters), and took the mass of the
worms (in grams) for both cups. We recorded the data on the “Mealworm Experiment Data Table”. We then
labeled the cups that were full of oatmeal as “fridge” and “reg”. Then we put one cup into the refrigerator and
on the counter. Then 3 days a week we took the mean length and mass of the meals worms. We did this for 8
days or 3 weeks.
Here is the data we collected over the 3 weeks:
Day
Mean Mass
of control
group
Mean length
of control
group
Number
dead in
group
Mean mass
of
experimental
group
Mean length
of
experimental
group
Number
dead in
group
0
1.9
grams
1
1.9
grams
2
1.9
grams
3
1.4
grams
4
1.2
grams
5
1.3
grams
6
1.2
grams
7
1.1
grams
8
0.4
grams
3.48
cm
3.48
cm
3.28
cm
2.40
cm
2.40
cm
2.20
cm
2.15
cm
2.13
cm
1.90
cm
0
0
0
1
1
1
1
2
3
1.3
grams
1.3
grams
1.3
grams
1.2
grams
1.3
grams
1.2
grams
1.3
grams
1.2
grams
1.3
grams
3
cm
3
cm
2.8
cm
2.6
cm
2.4
cm
2.4
cm
2.64
cm
2.54
cm
2.5
cm
0
0
0
0
0
0
0
0
0
Discussion: The control group had 3 out of the 5 meal worms die. The experimental group had all 5 meal
worms survive. The experimental group stayed about the same mean and mass the whole experiment. The
control group means mass and length decreased as some of them died, but their individual mass and length
increased as they pupated. A strange thing occurred with the experimental group, none of the meal worms
pupated. They all remanded as meal worms while the control groups meal worms did pupated and become
beetles.
Conclusion: The hypostasis was ‘’the meal worms will grow better in the refrigerator.’’ The meal worms did
not grow better in the refrigerator but more of them did stay alive. So my conclusion is that if you want to
keep your meal worms alive but do not want them to grow to full maturity, put them in the fridge. But if you
want your meal worms to grow to a beetle them keep them in room temperature.
Bibliography:


notebook (notes)
Wikipedia