Bio 6A/C - DNA Components and Changes/Mutations (Part 2 - Ch. 9 HOLT Biology)
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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A
vaccine is a. | a substance that
kills bacteria or viruses. | b. | an antibody. | c. | a plasmid that
contains disease-causing genes. | d. | a harmless version of a disease-causing
microbe. | | |
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2.
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Griffith’s experiments showed that a. | dead bacteria
could be brought back to life. | b. | harmful bacteria were hardier than harmless
bacteria. | c. | heat caused the harmful and harmless varieties of bacteria to
fuse. | d. | genetic material could be transferred between dead bacteria and
living bacteria. | | |
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3.
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Avery
and his research team concluded that a. | RNA was the genetic material. | b. | protein bases
were the genetic material. | c. | DNA and RNA were found in the human
nucleus. | d. | DNA was the genetic material. | | |
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4.
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The
scientist who worked with Martha Chase to prove that genetic material is composed of DNA
was a. | Alfred
Hershey. | c. | Francis
Crick. | b. | Oswald Avery. | d. | Rosalind Franklin. | | | | |
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5.
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Molecules of DNA are composed of long chains of a. | amino
acids. | c. | monosaccharides. | b. | fatty acids. | d. | nucleotides. | | | | |
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6.
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Which
of the following is not part of a molecule of DNA? a. | deoxyribose | c. | phosphate | b. | nitrogen base | d. | ribose | | | | |
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7.
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A
nucleotide consists of a. | a sugar, a protein, and adenine. | b. | a sugar, an
amino acid, and starch. | c. | a sugar, a phosphate group, and a nitrogen
base. | d. | a starch, a phosphate group, and a nitrogen
base. | | |
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8.
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Purines and pyrimidines are a. | nitrogen bases found in amino acids. | b. | able to replace
phosphate groups from defective DNA. | c. | names of specific types of DNA
molecules. | d. | classification groups for nitrogen
bases. | | |
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9.
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Of
the four nitrogen bases in DNA, which two are purines and which two are pyrimidines? a. | adenine—thymine; uracil—cytosine | b. | adenine—thymine; guanine—cytosine | c. | adenine—guanine; thymine—cytosine | d. | uracil—thymine; guanine—cytosine | | |
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10.
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Watson and Crick built models that demonstrated that a. | DNA and RNA have
the same structure. | b. | DNA is made of two strands that twist into a double
helix. | c. | guanine forms hydrogen bonds with
adenine. | d. | thymine forms hydrogen bonds with
cytosine. | | |
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11.
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X-ray
diffraction photographs by Wilkins and Franklin suggested that a. | DNA and RNA are
the same molecules. | b. | DNA is composed of either purines or pyrimidines, but not
both. | c. | DNA molecules are arranged as a tightly coiled
helix. | d. | DNA and proteins have the same basic
structure. | | |
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12.
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The
amount of guanine in an organism always equals the amount of a. | protein. | c. | adenine. | b. | thymine. | d. | cytosine. | | | | |
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13.
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adenine : thymine a. | protein : DNA | c. | guanine : cytosine | b. | Watson :
Crick | d. | adenine :
DNA | | | | |
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14.
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Which
of the following is not true about DNA replication? a. | It must occur
before a cell can divide. | b. | Two complementary strands are
duplicated. | c. | The double strand unwinds and unzips while it is being
duplicated. | d. | The process is catalyzed by enzymes called DNA
mutagens. | | |
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15.
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The
enzymes that unwind DNA are called a. | double helixes. | c. | forks. | b. | DNA
helicases. | d. | phages. | | | | |
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