Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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1.
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Which
labeled part is made up of strands of DNA?
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2.
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The World
Health Organization eradicated smallpox in the late 1970s. Which of the following is one of the main
reasons this feat was accomplished? a. | The smallpox virus only infects humans. | b. | The virus is inhaled or
enters the body through the skin. | c. | The virus can survive for long periods outside its human
host. | d. | The disease killed millions of people. | | |
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3.
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Which of the
following statements is NOT true? a. | Cells and viruses can reproduce. | c. | Viruses and cells are living things. | b. | Viruses and cells both
contain DNA. | d. | Viruses and cells vary
in size and shape. | | | | |
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4.
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How many
carbon atoms are in this nucleotide?
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First Base
in Codon | Second Base in
Codon | Third Base
in
Codon | A | A | G | T | C | | phenylalanine | serine | tyrosine | cysteine | A | phenylalanine | serine | tyrosine | cysteine | G | leucine | serine | stop | stop | T | leucine | serine | stop | tryptophan | C | G | leucine | proline | histidine | arginine | A | leucine | proline | histidine | arginine | G | leucine | proline | glutamine | arginine | T | leucine | proline | glutamine | arginine | C | T | isoleucine | threonine | asparagine | serine | A | isoleucine | threonine | asparagine | serine | G | isoleucine | threonine | lysine | arginine | T | methionine
(start) | threonine | lysine | arginine | C | C | valine | alanine | aspartate | glycine | A | valine | alanine | aspartate | glycine | G | valine | alanine | glutamate | glycine | T | valine | alanine | glutamate | glycine | C | | | | | | |
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5.
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Based on the
table above, which of the following nitrogen base sequences does NOT code for
alanine?
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6.
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Which of the
following bases pairs with adenine in RNA? a. | thymine | c. | uracil | b. | guanine | d. | cytosine | | | | |
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7.
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Which of the
following is true of incomplete dominance? a. | A third phenotype appears. | b. | Phenotypes of both
homozygotes are produced in heterozygote individuals. | c. | Both alleles are
expressed. | d. | Multiple alleles are expressed. | | |
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8.
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If two
heterozygous animals for a single dominant trait mate, what is the ratio of their
young? a. | 3:1 | c. | 9:3:3:1 | b. | 1:2:1 | d. | 1:6:9:1 | | | | |
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9.
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Using the
art above, what is the phenotype of each parent? a. | both dominant | c. | one dominant and one recessive | b. | both
recessive | d. | unable to tell from the
square | | | | |
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10.
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Which of the
following best describes the bacteria shown in A? a. | streptococci | c. | diplococci | b. | staphylococci | d. | diplobacilli | | | | |
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11.
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Bacteria
that grow in the presence of the antibiotic, penicillin, develop holes in their cell walls. Which of
the following explains why penicillin is effective against some bacteria? a. | Water enters the holes
in these bacteria and causes osmotic rupture. | b. | Penicillin causes the
flagella to become inactive. | c. | The pili of the bacteria puncture the
penicillin. | d. | Penicillin produces oxygen, which kills any kind of bacteria.
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12.
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Which
of the following, correctly sequences organisms with the most complex nervous systems to the least
complex? a. | Humans, birds,
worms, cnidarians | c. | Worms,
cnidarians, reptiles, mammals | b. | Amphibians, insects, mammals,
sponges | d. | Mammals,
cnidarians, worms, sponges | | | | |
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A school
implemented a peer-study group with one class of students to determine how it affected their science
grade. The school had four grading periods. The average science grades of the students who
participated in the study program were recorded for each grading period. The table below shows the
results.
Average Grade of
Students in Study Program | Grading
Period | Average Science Grade | First | 81 | Second | 85 | Third | 86 | Fourth | 89 | | |
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13.
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Which
statement best describes how the school might better analyze the impact of the study
program? a. | Compare the results to
the grades of students who did not participate in the study program. | b. | Compare the history
grades of students who participated in the program to their science grades. | c. | Examine the topics
studied in the science class. | d. | Interview students who did not participate in the
program. | | |
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14.
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What is
listed in the first column of a data table? a. | the title | c. | collected data | b. | characteristics to be
compared | d. | items to be
compared | | | | |
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15.
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What is
plotted on the x-axis of a line graph? a. | independent variables | c. | controls | b. | dependent variables | d. | comparisons | | | | |
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16.
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A student is
viewing some cells under a microscope. How might she determine whether they are plant or animal
cells? a. | Animal cells are larger
than plant cells. | c. | Only plant cells have
cell walls. | b. | Only animal cells have nuclei. | d. | Only animal cells have chromosomes. | | | | |
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17.
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Suppose you
are alone in your house. Suddenly, you hear a creak in the attic. Your heart begins to pound and your
breathing becomes rapid. Which of the following body systems controls these
reactions? a. | The somatic
system | c. | The sympathetic
system | b. | The circulatory system | d. | The respiratory system | | | | |
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18.
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What three
body systems are involved in this reaction? a. | Integumentary, nervous, and muscular | c. | Integumentary, skeletal, and muscular | b. | Skeletal, nervous, and
circulatory | d. | Integumentary,
autonomic, and muscular | | | | |
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19.
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Which of the
following systems plays a role in digestion? a. | Integumentary | c. | Reproductive | b. | Skeletal | d. | Endocrine | | | | |
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20.
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Which of the
following best describes the functions of blood? a. | It helps give the human body structure and
support. | b. | It aids in excretion of wastes via the urinary
system. | c. | It carries oxygen from the lungs and nutrients from the digestive
system to the cells. | d. | It aids in the formation of secondary sex characteristics including
the production of sperm and eggs. | | |
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21.
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How does
parasitism differ from predation? a. | No organism is harmed in a parasitic
relationship. | b. | No organism is harmed in a predator-prey
relationship. | c. | Parasitism does not always result in the death of an
organism. | d. | Parasitism does not occur among mammals. | | |
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22.
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Which model
would an ecologist use to show the weight of living material in an ecosystem? a. | A food
web | c. | A pyramid of
numbers | b. | A pyramid of energy | d. | A pyramid of biomass | | | | |
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23.
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What is the
function of the plant structure shown in the diagram? a. | To obtain
nutrients | c. | To conserve
water | b. | To protect the embryo | d. | To trap sunlight | | | | |
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24.
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Identify two
methods of nitrogen fixation. a. | Decomposition and excretion | c. | Respiration and transpiration | b. | Lightning and
bacteria | d. | Condensation and
evaporation | | | | |
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25.
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You
are on your first field investigation to study the social behavior of ducks. When you get out into
the field, what is the first thing you do? a. | Assign a control | c. | Report your results | b. | Draw
conclusions | d. | Observe the
ducks | | | | |
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