Instructions:
Put your name and student ID number on both the test and
the scantron.
On your scantron, bubble in your student ID number. Bubble in the test
version.
Only use pencil (spare ones up front). Erase stray marks fully. No stray marks
in the row of black lines.
On your scantron, identify the letter of the choice that best
completes the statement or answers the question.
If you think there is an error on the test,
make a note on your test (not the scantron) and tell the instructor on the way out.
Double
check your scantron for "double bubbles" or missing answers. There is no penalty for
guessing.
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1.
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These are the primary cellular sites for the production of proteins.
a. | Golgi bodies | b. | ribosomes | c. | mitochondria | d. | lysosomes | e. | smooth endoplasmic
reticula |
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2.
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Hormones may ______ gene transcription in target cells.
a. | promote | b. | inhibit | c. | participate
in | d. | both a and b |
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3.
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What part of a fatty acid can attract water molecules?
a. | Hydrophobic end | b. | Carboxyl group | c. | Nonpolar
section | d. | Hydrocarbon chain |
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4.
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Multiple effects of a single gene is known as
a. | expressivity. | b. | penetrance. | c. | codominance. | d. | pleiotropy. | e. | multiple
alleles. |
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5.
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Mendel's principle of independent assortment states that
a. | one allele is always dominant to another. | b. | hereditary units
from the male and female parents are blended in the offspring. | c. | the two hereditary
units that influence a certain trait segregate during gamete formation. | d. | each hereditary unit
is inherited separately from other hereditary units. | e. | all of these |
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6.
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If short hair (L) is dominant to long hair (l), animals LL
and Ll have the same
a. | parents. | b. | genotypes. | c. | phenotypes. | d. | alleles. | e. | genes. |
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7.
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A duplicated chromosome has _____ chromatid(s).
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8.
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A karyotype
a. | compares one set of chromosomes to another. | b. | is a visual display
of chromosomes arranged according to size. | c. | is a photograph of cells undergoing mitosis
during anaphase. | d. | of a normal human cell shows 48 chromosomes. | e. | cannot be used to
identify individual chromosomes beyond the fact that two chromosomes are
homologues. |
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9.
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In comparing mitosis and meiosis, which of the following statements is
true?
a. | Meiosis I is more like mitosis than is meiosis II. | b. | Both processes
result in four cells. | c. | Synapsis (pairing of chromosomes) occurs in
both. | d. | Chromatids are present only in mitosis. | e. | Meiosis II resembles
mitosis. |
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10.
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In which biome would you expect to find Spruce
a. | Rain Forest | b. | Desert
| c. | Coniferous Forest | d. | Tundra
| e. | Shrubland |
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11.
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The negative subatomic particle is the
a. | neutron. | b. | proton. | c. | electron. | d. | neutron and proton. | e. | proton and
electron. |
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12.
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The sequence of amino acids is the __________ structure of proteins.
a. | primary | b. | secondary | c. | tertiary | d. | quaternary | e. | stereo |
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13.
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Cell differentiation _____ .
a. | occurs in all complex multicelled organisms | b. | requires different
genes in different cells | c. | involves selective gene
expression | d. | both a and c | e. | all of the
above |
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14.
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Nucleotides contain what kind of sugars?
a. | three-carbon | b. | four-carbon | c. | five-carbon | d. | six-carbon | e. | seven-carbon |
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15.
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A locus is
a. | a recessive gene. | b. | an unmatched allele. | c. | a sex
chromosome. | d. | the location of an allele on a chromosome. | e. | a dominant
gene. |
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16.
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_____ are to nucleic acids as monomers are to polymers
a. | Nucleotides | b. | RNAs | c. | DNAs | d. | Nitrogenous bases | e. | Nucleosides |
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17.
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The expression of a given gene depends on the _____.
a. | type of cell and its functions | b. | chemical conditions | c. | environmental
signals | d. | all of the above |
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18.
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When water _________ it is called snow and/or rain.
a. | condenses | b. | precipitates | c. | pontificates | d. | subjugates |
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19.
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Meiosis _____ the parental chromosome number.
a. | doubles | b. | reduces | c. | maintains | d. | corrupts |
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20.
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The synthesis of an RNA molecule from a DNA template strand is
a. | replication. | b. | translation. | c. | transcription. | d. | DNA synthesis. | e. | metabolism. |
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21.
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An -OH group is a(n) __________ group.
a. | carboxyl | b. | hydroxyl | c. | amino | d. | methyl | e. | ketone |
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22.
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Which does NOT produce variation?
a. | crossing over | b. | random alignment of chromosomes during
meiosis | c. | asexual reproduction | d. | genetic recombination of
alleles | e. | sexual reproduction |
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23.
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The usual F2 phenotypic ratio of a dihybrid cross is
a. | 1:1. | b. | 2:1. | c. | 9:3:3:1. | d. | 1:2:1. | e. | 3:1. |
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24.
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Pleiotropic genes
a. | act on secondary sexual characteristics. | b. | influence more than
one aspect of phenotype. | c. | are additive. | d. | produce lethal
effects when homozygous. | e. | none of these |
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25.
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Prokaryotic cells do NOT have
a. | nucleoid regions. | b. | membrane bound nuclei. | c. | cytoplasm. | d. | plasma membrane. | e. | DNA. |
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26.
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Each cell is able to maintain a constant internal environment. This is
called
a. | metabolism. | b. | homeostasis. | c. | physiology. | d. | adaptation. | e. | evolution. |
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27.
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By gel electrophoresis, fragments of a gene lilbrary can be separated according
to _____ .
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28.
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_____ segregate during _____ .
a. | Homologues; mitosis | b. | Genes on nonhomologous chromosomes;
meiosis | c. | Homologues; meiosis | d. | Genes on one chromosome;
mitosis |
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29.
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Each of the cells formed during telophase I is
a. | diploid. | b. | tetraploid. | c. | in
synapsis. | d. | ready to be fertilized. | e. | haploid. |
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30.
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Pairing of homologues and crossing over occur during
a. | anaphase I. | b. | metaphase II. | c. | prophase
I. | d. | prophase II. | e. | telophase II. |
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31.
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An -NH2 group is a(n) __________ group.
a. | carboxyl | b. | hydroxyl | c. | amino | d. | methyl | e. | ketone |
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32.
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If all offspring of a cross have the genotype Aa, the parents of the
crosses would most likely be
a. | AA x aa. | b. | Aa x Aa. | c. | Aa x
aa. | d. | AA x Aa. | e. | none of these |
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33.
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In a chromosome, a _____ is a constricted region with attachment sites for
microtubules.
a. | chromatid | b. | cell plate | c. | centromere | d. | cleavage |
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34.
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Which organelle is the site of most of the cell's protein synthesis?
a. | Rough endoplasmic reticulum | b. | Smooth endoplasmic
reticulum | c. | Mitochondria | d. | Nucleus | e. | Cytoplasmic
ribosomes |
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35.
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Maternal and paternal chromosomes are shuffled most during
a. | anaphase II. | b. | metaphase I. | c. | prophase
I. | d. | telophase II. | e. | interphase. |
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36.
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The DNA fragments produced by automated DNA sequencing are identified
using
a. | radioactive probes. | b. | laser beams. | c. | ultracentrifugation. | d. | electron microscopy. | e. | restriction
enzymes. |
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37.
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Organelles composed of a system of canals, tubes, and sacs that transport
molecules inside the cytoplasm are
a. | Golgi bodies. | b. | ribosomes. | c. | mitochondria. | d. | lysosomes. | e. | endoplasmic
reticula. |
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38.
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DNA contains many different genes that are transcribed into different _____
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a. | proteins | b. | mRNAs only | c. | mRNAs, tRNAs, and
rRNAs | d. | all are correct |
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39.
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James Watson and Francis Crick
a. | established the double-stranded nature of DNA. | b. | established the
principle of base pairing. | c. | explained how DNA's structure permitted it
to be replicated. | d. | proposed the concept of the
double-helix. | e. | all of these |
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40.
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If short hair (L) is dominant to long hair (l), then to determine
the genotype of a short-haired animal it should be crossed with
a. | LL. | b. | Ll. | c. | ll. | d. | all of these | e. | none of
these |
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41.
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DNA coding regions that affect the same trait are called
a. | homologues. | b. | alleles. | c. | autosomes. | d. | loci. | e. | gametes. |
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42.
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Amino acids are the building blocks for
a. | proteins. | b. | steroids. | c. | lipids. | d. | nucleic acids. | e. | carbohydrates. |
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43.
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Nondisjuction can be caused by _____ .
a. | crossing over in mitosis | b. | segregation in meiosis | c. | failure of
chromosomes to separate during meiosis | d. | multiple independent
assortments |
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44.
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Crossing over is one of the most important events in meiosis because
a. | it produces new arrays of alleles on chromosomes. | b. | homologous
chromosomes must be separated into different daughter cells. | c. | the number of
chromosomes allotted to each daughter cell must be halved. | d. | homologous
chromatids must be separated into different daughter cells. | e. | all of
these |
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45.
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The lactose operon includes
a. | an operator. | b. | three structural genes that manufacture
lactose-metabolizing enzymes. | c. | a promoter. | d. | a
repressor. | e. | an operator, three structural genes that manufacture lactose-metabolizing enzymes,
and a promoter. |
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46.
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Genes are
a. | located on chromosomes. | b. | inherited in the same way as
chromosomes. | c. | arranged in linear sequence on chromosomes. | d. | assorted
independently during meiosis. | e. | all of these |
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47.
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Darwin saw that populations of Galapagos finches _____ .
a. | show variation in traits | b. | resemble birds in South
America | c. | are adapted to different island habitats | d. | all of the
above |
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48.
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Plants lose water through what process?
a. | Transpiration | b. | Condensation | c. | Precipitation | d. | Evaporation |
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49.
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If tall (D) is dominant to dwarf (d), and two homozygous varieties
DD and dd are crossed, then what kind of offspring will be produced?
a. | all intermediate forms | b. | all tall | c. | all
dwarf | d. | 1/2 tall, 1/2 dwarf | e. | 3/4 tall, 1/4
dwarf |
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50.
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A fatty acid with one or more double bonds in its hydrocarbon chain is said to
be
a. | saturated | b. | unsaturated | c. | condenses | d. | hydrolyzed | e. | supersaturated |
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