| |
SCI 135 - Second Exam Fall 2019
MULTIPLE CHOICE.
On the line to the left, place the letter of the choice
that best answers the question.
Three Points Each. NOTE: "e" answers are never the correct
answer.
1. When liver
cells build starches, the
process used is
_______ a. Dehydration synthesis
b. Carbohydration c. Polarity matching
d. Hydrolysis
e. Slimy
2. The active
ingredient in the waterproofing ScotchGuard spray is
_______ a. Ionized
b. Hydrophilic
c. Hydrophobic
d. Electronized
e. Something that, if you discover it, they’ll send a guy to tape you to death
3. Three
nucleotides that are used to produce one
amino acid in a gene -
_______ a. Allele
b. Codon
c. RNA d.
Aminon
e. Wait, I’m pretty sure I know this one
4. Prokaryote
chromosomes differ from eukaryote chromosomes
in
_______ a. Shape only
b. Number only
c. Shape and number
d. In no significant way e.
Well, one’s in that group and…no, too obvious
5. Which usually
exist as one to a few molecular ring structures?
_______ a. Sugars
b. Lipids
c. Water d.
Starches
e. The Molecule Wrestling Federation
6. In comparison
to a solution with a pH of 9, one that’s pH 11
would be
_______ a. 4 times as acidic
b. 4 times as basic
c. 100 times as acidic
d. 100 times as basic
e. Two years older
7. Polar
molecules get their polarity from
_____ a. Hydrogen bonds
b. Ionic bonds c. Multiple bonds
d. Electric bonds
e. I’m guessing some sort of bonds
8. The
organization of periodic table columns is based upon
_______ a. Protons
b. Neutrons
c. Electrons
d. Molecules
e. Eeeny, meeny, miney, moe...
9.
Eukaryote cells can be found in
_______ a. Multicelled species only
b. Single-celled species only
c. Both multicelled and single-celled species
d. Neither multicelled nor single-celled species
e. Am I right that one of these choices makes no sense at all?
10.
Surface tension in water is a
product of
_______ a. Ionic bonds
b. Cohesion
c. Adhesion d.
Covalent bonds
e. What makes water tense?
11. Life in
general has protein-driven chemistry. The type
of proteins that drive it are
_______ a. Enzymes
b. ATP
c. Hormones d.
Carbohydrates
e. Trained at tiny driving schools
12.
Oxygen and Nitrogen in the air exist as stable
molecules (O2 and N2, from
Columns 6 and 5, respectively) which have
_______ a. Hydrogen bonds
b. Ionic bonds
c. Multiple bonds
d. Electric bonds
e. I’m guessing some sort of bonds, again
SHORT ANSWER.
Answer any eight of the following questions for 4 Points Each.
Note: if you answer more than eight, only the first eight
will be corrected.
You can get partial credit on these answers.
| 1. What are the functions
of the two ends of an antibody molecule? |
|
|
| 2. In a cup of coffee
(no cream, no sugar), what is the - |
SOLVENT?
|
SOLUTE?
|
| 3. Give the base sequence
for the other strand of DNA - |
_________________________________________________________
A C T C G A T A
C T G A
_________________________________________________________ |
| 4. What are the two basic
component molecules of a lipid? |
|
|
| 5. What are the two main proteins
in muscle? |
|
|
| 6. The math-based
explanation for maximum cell size works on the
ratio between what and what? |
|
7. Briefly explain what a
hydration shell is.
|
| 8. What feature of many
toxins makes them easily absorbed into cells? |
|
| 9. The laboratory technique called
sectioning - |
WHAT
IS
IT? |
WHY
IS IT
NEEDED? |
10. What makes something
a polymer?
|
11. What makes a
lipid molecule unsaturated?
|
12. What happens at an
enzyme’s active site?
|
| 13. Label the following chemical
reaction with the general
terms for each part – |
A
+ B
x
> C
|
14. What “adjustment
language” was added later to the Cell Theory?
|
| 15. What are two different things found
in non-coding DNA that are still some type of
code? |
|
|
16. Column 8
elements are very unreactive chemically. Briefly
explain why.
|
LONG ANSWER.
Answer any four of the following questions for Eight Points
Each.
Note: if you answer more than four, only the first four
will be corrected.
You can get partial credit on these answers.
|
1. Using the numbers of bonds as a
guide, fill in the symbols for either Carbon,
Hydrogen, Nitrogen, or Oxygen. |
Can't recreate
the original hand drawing. Draw bonds yourself (include some
doubles) and practice.
O O O
O O O O
O O O
O O |
| 2. Give two
different uses for each - |
| LIPIDS
|
CARBOHYDRATES |
|
|
|
|
|
3. Name and give a
brief description for the four levels of
protein structure. |
|
|
|
|
|
|
|
|
|
4.
Microscopes can be split into two main groups based upon either
listed feature. For each feature, name the
groups. |
Nature of the
Imaging Beam |
|
|
Interaction of Beam
with specimen |
|
|
| 5. Explain what happens, on the
molecular level, to water as the temperature drops from 15o
C to -5o C. |
|
|
6.
Give four rules from
the Cell Theory. |
|
|
|
|
|
7. For the pH scale shown below, fill
in the proper blanks - |
-------------------------------------------------------------------------------------------------
2 3 4 5 6 7
8 9 10 11 12
13
Range
Name
_____________
____________
_________________
Active
Ion
_______________
_________________ |
Link to
Answer Key
BONUS QUESTIONS.
Answer as many as you are able. Wrong
answers will not result in points being lost from the main exam. You can get
partial credit on these answers.
What is it about free radicals that makes them so unstable?
Three Points.
Why is the atmosphere almost 75% Nitrogen? Three Points.
Science fiction writers have thought that elements other
than carbon might serve as the main atoms in alien living systems - based on
what makes carbon work in our systems, where should they look for candidate
elements? Three Points.
Pick a single property of water - tell which it is, and for
Three Points explain why that property is critical for Life on Earth.
What does the term pH actually stand for? Don’t define it,
explain why it’s called “pH.” Three Points.
Some ant alarmones produce two different effects at
different strengths. For Two Points Each, what are those effects?
What about a chemical name tells you that it’s an enzyme?
Three Points.
Which of our proteins have pretty low specificity? Three
Points.
How is resolution measured? There are a couple of ways –
Three Points for a valid one.
Why do some microscopes have to have a vacuum inside them?
Three Points.
|
|