Biology
111 Name______________________________
Exam
#3, Copy A
5
November 2007
By
signing my name above, I attest that I have neither given nor received
unauthorized information
concerning this test. I also attest that I will not communicate any
information on this test to any other
student that has not taken this test yet.
Part
A. Please provide an appropriate
definition for each of the following terms.
Each completely correct definition will be worth 2 pts.
1. mitosis-
2. telophase-
3. haploid-
4. spermatogenesis-
5. genotype-
6. principle of
segregation-
7. epistasis-
8. nondisjunction-
9. trisomy-
10.
gene linkage-
11. Chargraff's Rule-
12. Watson & Crick-
13. telomere-
14. helicase-
15. anticodon-
16. intron-
Part
B. Please select the best answer to each
of the following questions:
_____17. Prokaryotic chromosomes are:
a. single, circular loops of DNA
b. found in the dense region of the cell
called the nucleoid
c. replicated before the cell reproduces
d. all of the above
e. none of the above
_____18. The central constricted region
found in eukaryotic chromosomes is called the:
a. centromere
b. centrosome
c. centriole
d. aster
e. none of the above
_____19. The stage in mitosis where
chromosomes line up at the equator of the cell is:
a. anaphase
b. interphase
c. metaphase
d. prophase
e. telophase
_____20. The cell at right is in _____
of mitosis.
a. anaphase
b. interphase
c. metaphase
d. prophase
e. telophase
_____21. Which of the following
organisms would not have an aster as a part of their mitosis?
a. dog
b. corn
c. human
d. all of the above would have asters
e. none of the above would have asters
_____22. Which of the following cells
are "locked" in G1 phase of interphase,
and will not go through the
cell
cycle?
a. skin cells
b. neurons
c. bone cells
d. all of the above
e. none of the above
_____23. A haploid human cell would
contain ____ chromosomes.
a. 1
b. 23
c. 46
d. 47
e. none of the above
_____24. Crossing over occurs during the
_____ of homologous chromosomes.
a. cytokinesis
b. glycolysis
c. mitosis
d. synapsis
e. none of the above
_____25. The cell at right shows
homologous chromosomes lined up in pairs across the equator of the cell.
This cell is in:
a. metaphase of mitosis
b. metaphase I of meiosis
c. metaphase II of meiosis
d. prophase II of meiosis
e. none of the above
_____26. A clone is:
a. any organism that is formed
unnaturally.
b. any organism or cell that is
genetically identical to another organism or cell.
c. any organism which has been genetically
manipulated by humans.
d. a type of protein which DNA winds
around in a chromosome.
e. none of the above
_____27. The cell that begins the
process of spermatogenesis is called the:
a. primary spermatocyte
b. secondary spermatocyte
c. sperm
d. spermatid
e. none of the above
_____28. How many functional ova are
produced from each primary oocyte that begins oogenesis?
a. 1
b. 2
c. 3
d. 4
e. millions
_____29. Because of his meticulous work
with the genetics of garden peas, ______ is often considered to
be the
"father of genetics".
a. Chargraff
b. Mendel
c. Griffith
d. Watson
e. Franklin
_____30. In a cross between QQ and qq, the offspring will all be:
a. homozygous dominant
b. homozygous recessive
c. a combination of homozygous dominant
and homozygous recessive
d. heterozygous
e. none of the above
_____31. In a cross between Qq and Qq, what percentage of the
offspring will be qq?
a. 0%
b. 25%
c. 50%
d. 75%
e. 100%
_____32. According to Mendel's Principle
of Independent Assortment:
a. a single gene will express many
independent traits
b. dominant alleles will cancel out the
expression of recessive alleles
c. 50% of
an individual's gametes will receive one allele of a pair, and 50% of
the gametes will
receive the other
allele of the pair.
d. one gene will not influence how
another gene is inherited
e. none of the above
_____33. If you have type "O"
blood, what is your genotype?
a. IOIO
b. ii
c. IAIB
d. all of the above
e. none of the above
_____34. Neurofibromatosis and
Huntington's disease are both examples of:
a. X-linked diseases
b. autosomal
dominant diseases
c. autosomal
recessive diseases
d. cancers
e. trisomies
_____35. Which of the following humans
would be a female?
a. XY
b. XYY
c. X
d. XXY
e. none of the above
_____36. Which of the following parents
could produce a colorblind daughter?
a. a normal male and a female carrier
b. a normal male and a colorblind female
c. a colorblind male and a female carrier
d. all of the above
e. none of the above
_____37. Down syndrome is a result of:
a. a dominant genetic trait
b. a recessive genetic trait
c. a monosomy
d. a trisomy
e. none of the above
_____38. Which of the following genetic
disorders is usually a result of nondisjunction?
a. Down syndrome
b. colorblindness
c. Huntington's disease
d. all of the above
e. none of the above
_____39. A normal female will have ___
Barr bodies in her cells.
a. no
b. 1
c. 2
d. 46
e. thousands of
_____40. _____ is a result of a deletion
on chromosome #15.
a. Angelman
syndrome
b. Prader-Willi syndrome
c. Turner syndrome
d. both a & b above
e. both b & c above
_____41. When Griffith injected living
"R"-strain (nonpathogenic) bacteria and killed "S"-strain
(pathogenic)
bacteria into the same mouse:
a. the mouse survived
b. the mouse died of pneumonia
c. the mouse was slightly sickened by a
weakened strain of pneumonia
d. the mouse became resistant to
pneumonia
e. none of the above
_____42. The base of the nucleotide
attaches to the __ carbon of the sugar.
a. 1'
b. 2'
c. 3'
d. 4'
e. 5'
_____43. Which of the following bases is
a purine?
a. cytosine
b. guanine
c. thymine
d. all of the above
e. none of the above
_____44. Which model of DNA replication
is correct?
a. fluid-mosaic model
b. Mendel's model
c. conservative model
d. semi-conservative model
e. none of the above
_____45. Which of the following enzymes
has a "proofreading" subunit?
a. helicase
b. phenylketonuriase
c. RNA polymerase
d. DNA polymerase complex
e. none of the above
_____46. The enzyme that regenerates the
tips of chromosomes is called:
a. helicase
b. hyaluronidase
c. DNA polymerase complex
d. RNA polymerase
e. telomerase
_____47. Amino acids are carried by ____
to the ribosome during translation.
a. mRNA
b. rRNA
c. tRNA
d. all of the above
e. none of the above
_____48. The mRNA strand read from the
DNA strand
ATTCGATCGGGA would be:
a. ATTCGATCGGGA
b. AUUCGAUCGGGA
c. TAAGCTAGCCCT
d. UAAGCUAGCCCU
e. none of the above
_____49. Exons:
a. are three base sequences on mRNA
molecules that code for a single amino acid
b. are regions of DNA that code for
protein
c. are regions of DNA that do not code
for protein
d. are three base sequences on tRNA molecules that match up with codons
e. none of the above
_____50. The __ site of the ribosome is
where new tRNAs bring in
amino acids during the process of
translation.
a. A
b. B
c. C
d. P
e. none of the above
_____51. Using the codon
table attached to this test, the codon ACU codes for:
a. stop
b. Ser
c. Thr
d. start
e. none of the above
_____52. Mutations may be caused by:
a. UV light
b. chemicals
c. radiation
d. all of the above
e. none of the above
Short Answer questions.
53. Describe the events that occur during telophase of mitosis. (6 pts.)
54. A type of blindness in humans, called aniridia, is caused by a dominant allele (A = aniridia, a = normal).
If a man with aniridia who is heterozygous for
this trait marries a woman who is normal, what is the possibility that they
will have a child with aniridia? (6 pts)
55. In guinea pigs, B = black fur, b = brown fur,
S= short hair, and s = long hair. What
would be the phenotypic ratio of the offspring of a cross between a BbSs guinea pig and a bbss guinea
pig? (6 pts)
56. Name and briefly describe 3 trisomy disorders.
(6 pts)
57. 58. Fill in the blanks: (8 pts.)
"CRICK"
DNA STRAND: A A A T
T
T
G G C
"WATSON"
DNA STRAND: _____ _____ _____ _____ _____ _____ _____ _____ _____
mRNA STRAND made
from
the
"WATSON" STRAND: _____
_____ _____ _____ _____ _____ _____ _____ _____
tRNA ANTICODONs that
match with the mRNA
above: _____ _____ _____ _____ _____ _____ _____ _____ _____
AMINO
ACIDS brought in
by the above tRNAs:
_________________ _________________ _________________