|
SC 135 - Third Exam Spring 2010
Links connect to relevant
parts of the online book.
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.
A bad fertilizer solution has a lower concentration of water than
found in the root cells of the treated plant. Which bad thing should happen?
_______ a. Osmosis from roots out
b. Osmosis from soil in c. Nutrients
diffuse into roots d. Nutrients
diffuse out of roots
e. The plant won't look pretty
2. Which of these are the DNA-spooling proteins?
_______ a. Prions b. Chaperonins
c. Histones d. Microtubules
e. Spoolies
3. Which serves as a cell's transport channel system?
_______ a. Cell membrane b.
Spindle c. Vesicles
d. Endoplasmic reticulum e. Time
Warner
4. Singlet-doublet chromosomes are sometimes used to produce
_______ a. Dominant traits b.
Gender c. Recessive traits
d. Transfer RNA e. Cute little crochet
patterns
5.
A cell's internal structures can be built from all
of these except
_______ a. Membranes b.
Microstruts c. Microtubules
d. Microfilaments e. Microband-aids
6. When treated with radiation, cancer cells are likely to die
_______ a. As soon as the radiation hits them
b. After the cell has divided
c. Just after they absorb the radiation
d. They don't die, they just become non-cancerous
e. And no one is going to try to save them
7.
Which condition is directly associated with central vacuoles?
_______ a. Droopy house plants
b. Smelly cheese c. Brown grass
d. Dead fish
e. Is "exploding brain" a condition...?
8. If a gene sequence mutates, it will certainly
_______ a. Cause major problems
b. Cause some sort of problem c. Be a
different allele d. Have no
actual effect
e. Be used in a zombie movie
9.
Which cell function is performed by organelles that probably began as
endosymbionts?
_______ a. Mitosis b.
Movement c. Digestion
d. Photosynthesis e. Is this an
immigrant thing-?
10. Which of these is generally a bad thing?
_______ a. Diploid
b. Metaploid
c. Polyploid
d. Haploid
e. Weird sound: "Ploid, ploid, ploid..."
11. The function of a nucleolus mostly involves
_______ a. DNA copying b. DNA
processing c. RNA storage
d. A double membrane e. Boring
stuff
12. How much of a human being's DNA is actually gene
codes?
_______ a. 100%
b. 90% - 95%
c. 60% - 75%
d. Less than 20%
e. Am I supposed to think this out? Yikes!
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 happens in a
peroxisome? |
| |
|
2. Give two
different pieces of evidence that support the endosymbiont theory. |
| |
|
|
3. What are two ways that prokaryote
chromosomes are different from eukaryote
chromosomes? |
| |
|
|
4. For
contractile vacuoles - |
What sort of
organisms have
them? |
What are
they used
for? |
|
6. What was the fluid mosaic model
developed to describe? |
|
|
7. Why is a substitution
point mutation less dangerous than an insertion
or deletion? |
| |
|
9. A chromosome
is mostly a combination of what two different types of
molecules? |
|
|
|
10. What are on the
two functional ends of a transfer RNA molecule? |
|
|
|
11. If a cell is full of
golgi bodies, what is that cell probably doing? |
|
|
12. For a high
chromosome number, what's the biggest - |
| Advantage? |
Disadvantage?
|
|
13. What are two
major groups of organisms that have cell walls? |
|
|
|
15. What are two
different things that attach to centromeres? |
|
|
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. Name and briefly
describe four cell structures (that would not
include embedded proteins) found on or around the outside of a
eukaryote cell. |
| |
|
| |
|
| |
|
| |
|
|
2. Give three
sets of differences (other than the associated genders) between - |
|
EGG CELLS |
SPERM |
| |
|
| |
|
| |
|
|
4. Pick two of these
three genetics terms, and explain how each one works. |
LINKAGE -
|
DOMINANT ALLELES
-
|
POINT MUTATION -
|
|
4. Give, in order,
the four steps of actual mitosis, and for each give one
thing that happens just during that stage. |
| |
|
| |
|
| |
|
| |
|
|
5. What are four
different functions that are performed by proteins
embedded in cell membranes? |
| |
|
| |
|
|
6. Given here is one side
(strand) of DNA. Starting with this strand, and using the
table attached
to the back of the exam, show: |
Starting
____________________________________________________________
Strand T A C A G C
C C C G C A T T G C T A G G G A T T
____________________________________________________________
Messenger RNA from 1st strand
_____________________________________________________________
Amino Acid Sequence |
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.
For Four Points, produce a labeled drawing to show how phospholipid molecules
are arranged in a membrane.
Explain why secretion from a cell has to be active transport. Three Points.
What makes rough endoplasmic reticulum "rough"? Three Points.
Why do many genetics studies use mtDNA? Three Points.
For Two Points Each, what areas of human health are involved with telomere
research?
Which group of organisms commonly uses sexual reproduction without using
genders? Three Points.
What aspect of HIV makes it more likely to produce escape mutants? Three Points.
And what are they "escaping"? Three Points.
When Ich, a parasite of aquarium fish, divides, what unusual thing happens?
|