SPRING
2004
1. A somatic
cell having two of each type of chromosome has a(n)_______chromosome number
a. diploid
b. haploid
c. abnormal
d. normal
gamete
2. A ________
is where microtubules attach to a chromosome during cell division
a. chromatid
b. centromere
c. plasma membrane
d. cleavage furrow
3. Interphase
is a part of the cell cycle when_____________
a. the entire cell divides
b. DNA replicates
c. the cell rests
d.
crossing over occurs
4. At the end
of mitosis, the chromosome number of a daughter cell is _______ the parent cell
a. identical to
b. one-half
c. rearranged compared to
d.
doubled compared to
5. Mitosis and
cytokinesis function in the ___________
a. development of an organism
b. growth and tissue repair of
eukaryotes
c. germ cell formation
d. both a and b
6.
During____________ of mitosis, sister chromatids separate in a cell
a. prophase
b. metaphase
c. anaphase
d. telophase
7. Sexual reproduction requires____________
a. meiosis
b. gamete
formation
c. haploid
germ cells
d. all of the
above
8. Homologous
chromosome pairs________
a. carry the same genes
b. interact at meiosis
c. exchange genetic information
during prophase I of meiosis
d. all of the above
9. The duration
of the cell cycle________
a. is the same for all cells
b. is faster in rapidly dividing cells
such as blood cells
c.
is quickest in neurons
d. none of the above
10. Mitosis
results in_________
a. clones which are identical to the
parental cell
b. mature sperm cells
c. genetic exchange between homologous
chromosome pairs
d. all of the above
11.
During
________ of mitosis, two new nuclear membranes form prior to cytokinesis
a. metaphase
b. prophase
c. telophase
d. anaphase
12. Meiosis
_______ the parental chromosome number
a. doubles
b. reduces
c. maintains
d. isolates
13. In some of
his experiments, Mendel studied the inheritance patterns of two characteristics
at once-flower color and pod color, for example. He did this to find out
a. whether genes for the two characteristics
are inherited together or separately
b. how many genes are responsible for
determining a characteristic
c. whether genes are on chromosomes
d. how many different genes a pea plant has
14. Alleles
are__________
a. pairs of homologous chromosomes
b. B (brown eyes) and b(blue eyes)
c. different molecular forms of the same gene
d. both b and c
15. A homozygote
has a ___________ for the trait being studied
a. pair of identical alleles
b. pair of nonidentical alleles
c. different gene for the same trait from
each parent
d. both b and c
16. F1 offspring
of a monohybrid cross DD x dd are___________
a. all BB
b. all Bb
c. ˝ BB and ˝ bb
17. Second
generation offspring from a cross are called the __________
a. F1 generation
b. F2 generation
c. hybrid generation
d. yuppie generation
18. Utilizing the
Punnett square, offspring of the cross, Bb x Bb will show a genotypic
ratio of _______
a. 3BB:1Bb:1bb
b. 1BB:1bb
c. 1BB:2Bb:1bb
d. 1Bb:3bb
19. Crosses
between F1 individuals resulting from the parental cross AABB x aabb lead to F2
phenotypic rations close to ____
a. 1:1
b. 3:2:1
c. 9:3:3:1
d. 1:1:1:1
20. BBcc x bbCC
is an example of a_______
a. dihybrid cross
b. monohybrid cross
c. homozygous condition
d.
phenotype
a. Tay-sach’s testing
b. amniocentesis
c. chorionic villus sampling
d. none of the above
22. Which of the following conditions is not a recessive disorder?
a. cystic fibrosis
b. sickle-cell anemia
c. Huntington’s disease
23. _______ refers to an individuals observable traits, such as blue eyes.
a. phenotype
b. genotype
c. hybrid
d. none of the above
24. Directional
selection
a. eliminate
uncommon forms of alleles
b. shifts
allele frequencies in a steady, consistent direction
c. forms
intermediate forms of a trait
d. works
against adaptive traits
25. Disruptive
selection
a. eliminates
uncommon forms of alleles
b. shifts
allele frequency in a steady, consistent direction
c. favors
extreme forms of a trait
d. both b and
c
26. Natural
selection may occur when there are
a. differences
in adaptiveness of forms of a trait to prevailing environmental conditions
b. differences
in survival and reproduction among individuals that differ in one or more
traits
c. both a and b
d. none of the
above
27. Stabilizing
selection
a. favors intermediate forms of a trait
b. works
against adaptive traits
c. used as a
strategy to defend against parasites
d. none of the
above
28. Genetic drift
is
a. the only
source of new alleles in a population
b. represents
immigration and/or emigration to change the allele frequency
c. a change in
population allele frequency due to chance alone
d. differences
in survival and reproduction among individual populations
29. Antibiotic
resistance is an example of
a. directional selection
b. disruptive selection
c. stabilizing selection
d. sexual selection
a. genetic counseling
b. amniocentesis
c. chorionic villus sampling
d. none of the above
31. ________is a dominant genetic disorder in that _______ of the parents must be carriers for an offspring to be afflicted with the disease
a. cystic fibrosis; both
b. Huntington’s disease; only one
c. sickle-cell anemia; only one
d.
Tay-Sach’s disease; both
32.
Which
of the following correctly ranks the structures in order of size, from smallest
to largest?
a. nucleotide-codon-gene-chromosome
b. chromosome-gene-nucleotide-codon
c. nucleotide-chromosome-gene-codon
d. chromosome-nucleotide-gene-codon
33. The nucleotide sequence of a DNA
codon is CTG. A messenger RNA (mRNA)
molecule with a complementary codon is transcribed from the DNA. In the process of protein synthesis, a
transfer RNA (tRNA) anticodon pairs with the mRNA codon. What is the nucleotide sequence of the tRNA
codon?
a. CAT
b. GTC
c. GUC
d. CUG
34. Viruses such as Ebola and HIV contain an enzyme called ___________ that
allows them to make _________ from __________
a. DNA polymerase; DNA; DNA
b. reverse transcriptase; RNA; DNA
c. reverse transcriptase; DNA; RNA
d. RNA ligase; DNA from RNA
35. Initiation of ___________ occurs when tRNA and mRNA converge at the
_________subunit of a ________________
a. transcription; main; Golgi complex
b. translation; small; smooth endoplasmic reticulum
c. translation; small; ribosome
d. translation; large; ribosome
36. The START
codon of a messenger RNA molecule codes for the first amino acid of a
protein, which is__________, whereas the STOP codon codes for
__________________
a. methionine; no
amino acids
b. adenine; glutamine
c. valine; no amino
acids
d. methionine; tRNA
37.
During___________, DNA polymerase binds to the promoter region of DNA
a. DNA replication
b. translation
c. reverse transcription
d. transcription
38. _____is
responsible for delivering ___________ to the ribosomes during translation
a. an mRNA codon; amino acids
b. transfer RNA; amino acids
c. ribosomal RNA; RNA polymerase
d. RNA polymerase; amino acids
39.
Studies by Hershey-Chase on viruses in 1952 proved that_________
a. viral
protein is injected into the host cell
b. DNA is the
hereditary material
c. viruses are prokaryotic organisms
d. none of the
above
40. A mutation in the p53 protein could result in__________________
a. a defect in the cell cycle checkpoint, leading to uncontrolled cell
division
b. cancer
c. meiosis instead of mitosis
d. both a and b