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Practice EOC Questions

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Title: Practice EOC Questions


1
Practice EOC Questions
  • Part Four
  • (61-80)

2
61. What is the key difference between mitosis
and meiosis during the actual process?
  • A. Both double the number of chromosomes, but in
    meiosis the cell divides twice.
  • B. In mitosis the number of chromosomes doubles
    twice and then divides.
  • C. In meiosis the number of chromosomes does not
    double, and the cell divides.
  • D. In mitosis the number of chromosomes doubles
    and then the cell divides thrice.
  • The correct answer is
  • A

3
62. What is the function of mitosis?
  • A. to make sperm or egg cells
  • B. to maintain the chromosome number in the
    offspring
  • C. to produce more DNA for protein synthesis
  • D. to produce more body cells
  • The correct answer is
  • D

4
63. Why is sexual reproduction usually considered
more advantageous than asexual reproduction?
  • A. It maintains the same exact DNA from one
    generation to the next.
  • B. It helps to increase genetic variation.
  • C. It promotes more interaction between males and
    females of the same species.
  • D. It helps maintain the chromosome number of the
    species.
  • The correct answer is
  • B

5
64. Many simple organisms like bacteria reproduce
asexually most of the time. What could be a
source of genetic variation for these organisms?
  • Crossing over
  • Random assortment of chromosomes
  • Mutation
  • Random mating
  • The correct answer is
  • C

6
65. Why are mutations, which are usually
negative, sometimes considered beneficial to an
organism or species?
  • A. They provide genetic variation.
  • B. They help to eliminate other harmful genes.
  • C. They help to increase the size of the genome.
  • D. What is harmful to one species may be
    beneficial to another.
  • The correct answer is
  • A

7
66. Which of the following is an advantage of
asexual reproduction?
  • A. Daughter cells are exact copies of each other.
  • B. Only one parent is involved.
  • C. Exact copies of favorable traits will be
    inherited.
  • D. Many clones of the mother may be produced.
  • The correct answer is
  • C

8
67. The allele for hemophilia is sex-linked
recessive. Mr. Perkins is a hemophiliac. Mrs.
Perkins is a carrier. What percent chance would
the Perkins offspring have of being hemophiliacs?
  • A. 0
  • B. 25
  • C. 50
  • D. 100
  • The correct answer is
  • C

9
68. The Johnsons have two children, Jack and
Jill. Jack has type A blood and Jill has type B
blood. Which one of these pairings could
represent the blood type of the parents?
  • A. Type A and Type O
  • B. Type AB and Type A
  • C. Type O and Type B
  • D. Answer cannot be determined from the
    information given.
  • The correct answer is
  • B

10
69. Scientists discovered a strain of bacteria
that is capable of digesting oil. How might
these bacteria be most helpful to scientists?
  • A. The bacteria could produce oil for fuel.
  • B. The bacteria could make new products from
    petroleum.
  • C. The bacteria could be used to clean up oil
    spills.
  • D. The bacteria could improve the quality of
    petroleum.
  • The correct answer is
  • C

11
70. In a lab the stain methyl green-pyronin Y is
used to detect the presence of DNA and RNA.
Methyl green is absorbed by the DNA and stains it
blue. If you observed the a stained slide of an
onion root tip under the microscope, which
structures would you expect to be stained blue?
  • A. chloroplast
  • B. chromosome
  • C. ribosomes
  • D. nucleoli
  • The correct answer is
  • B

12
71. Two different bacterial strains are placed in
the same petri dish. Strain A is resistant to
the antibiotic Ampicillin while Strain B is
resistant to the antibiotic Streptomycin. Under
certain circumstances the bacteria exchange DNA.
Which experiment would best show if these two
strains exchanged DNA?
  • A. expose both strains to another antibiotic
  • B. expose both strains to Ampicillin only
  • C. expose both strains to Streptomycin only
  • D. expose both strains to both Ampicillin and
    Streptomycin
  • The correct answer is
  • D

13
72. Which statement best describes a plasmid?
  • A. a small circular DNA found in some bacterial
    cells
  • B. a type of DNA found in yeast cells
  • C. a small piece of DNA found in frogs
  • D. an enzyme used to cut DNA
  • The correct answer is
  • A

14
73. Which of the following is used to cut DNA
into fragments?
  • A. clones
  • B. recombinant DNA
  • C. vectors
  • D. restriction enzymes
  • The correct answer is
  • D

15
74. Which of the following statements best
describes the function of the polymerase chain
reaction (PCR)?
  • A. It is used to cut DNA into fragments.
  • B. It is used to carry DNA from one cell to
    another.
  • C. It is used to separate DNA into fragments.
  • D. It is used to make copies of DNA.
  • The correct answer is
  • D

16
75. For several years scientists around the world
have been working on the Human Genome Project.
What is the main purpose of the project?
  • A. to locate all human genes
  • B. to slice and clone genes
  • C. to find cures for infectious disease
  • D. to alter DNA in genes
  • The correct answer is
  • A

17
76. Insects, such as ants, dragonflies, and moths
belong to class Insecta. To which phylum does
the class Insecta belong?
  • A. Cnidaria
  • B. Chordata
  • C. Arthropoda
  • D. Annelida
  • The correct answer is
  • C

18
77.The water cycle involves the movement of water
between the earth and the atmosphere. If a
forest was logged along the banks of a stream
leaving no buffers, what would the probable
outcome be?
  • A. increased ground water due to lack of tree
    cover
  • B. increased fish in the surrounding streams
  • C. increased oxygen in surrounding streams
  • D. increased sediments in surrounding streams
  • The correct answer is
  • D

19
78. During the carbon cycle, carbon dioxide is
normally released as a byproduct of respiration.
Major human impact on this cycle causes much more
carbon dioxide to be released. As a result, what
environmental problem confronts humans today?
  • A. global warming
  • B. ozone depletion
  • C. habitat destruction
  • D. water quality degradation
  • The correct answer is
  • A

20
79. Circadian rhythm is defined as a recurring
behavioral pattern that occurs in approximately
24 hour cycles. Which one of the following is an
example of circadian rhythm?
  • A. hibernation
  • B. estivation
  • C. animals moving from one area to another as
    seasonal time changes
  • D. water lily blooms that open during the day and
    close at night
  • The correct answer is
  • D

21
80. As the steps of succession progress, state
what happens.
  • A. Species diversity and plant growth rate are
    high during primary succession.
  • B. Plant growth rate and species diversity are
    equal during secondary succession.
  • C. Plant growth rate is low and species diversity
    is high in the climax forest.
  • D. Both plant growth rate and species diversity
    are high in secondary succession.
  • The correct answer is..
  • C
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