Biology II Ch. 15 Mastery Learning Test in Worksheets
Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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Select the one characteristic that is NOT different between DNA and RNA.
a. | identity of the nucleotide sugar | c. | number of strands in the
molecule | b. | identity of one of the bases | d. | solubility in
water |
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2.
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Select the incorrect association.
a. | mRNA - takes DNA message to the ribosome | b. | mRNA - takes amino
acids to the ribosome | c. | rRNA - combines with protein in ribosomal
subunits | d. | tRNA - has an anticodon |
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3.
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Select the incorrect association.
a. | transcription - DNA synthesized | c. | translation - occurs at the
ribosome | b. | transcription - RNA synthesized | d. | transition - polypeptide is
made |
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4.
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If each codon consisted of two bases, there would be ______________ different
codons.
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5.
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The base sequence of DNA is ATAGCATCC. The sequence of RNA transcribed from this
strand is
a. | ATAGCATCC | c. | CCUACGAUA | b. | CCTACGATA | d. | UAUCGUAGG |
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6.
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An mRNA base sequence is UUAGCA. The two anticodons complementary to this
are
a. | AAT CGT | c. | TTA GCA | b. | AAUCGU | d. | UUA GCA |
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7.
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A DNA base sequence is 90 bases long. How many codons can this sequence
order?
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8.
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An RNA base sequence is 120 bases long. How many anticodons can it order?
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9.
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During chain elongation,
a. | the P site but not the A site of a ribosome is required. | b. | the tRNA at the P
site transfers the growing polypeptide to the tRNA-amino acid at the A site. | c. | several ribosomes
are involved per polypeptide made. | d. | the amino acids line up and then are joined by
peptide bonds. |
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10.
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A DNA base sequence changes from ATGCGG to ATGCGC. This type of mutation
is
a. | deletion. | c. | point. | b. | frameshift. | d. | translocation. |
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11.
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Which of the following pairs is NOT a valid comparison of DNA and
RNA?
DNA
RNA
a. | double helix single
stranded | b. | replicates
replicated | c. | deoxyribose
ribose | d. | thymine
uracil |
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12.
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Which of these is true of an anticodon but is not true of a codon?
a. | part of an RNA molecule | c. | part of a tRNA
molecule | b. | sequence of three bases | d. | part of a mRNA molecule |
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13.
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If a mutation occurs, then
a. | the code changes | b. | some particular codon or codons
changes | c. | some particular anticodon or anticodons changes | d. | Both A and B are
correct | e. | All of these are correct. |
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14.
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RNA nucleotides are joined during transcription by
a. | helicase | c. | RNA polymerase | b. | DNA polymerase | d. | ribozymes |
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15.
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Which statement is NOT true?
a. | Transcription in eukaryotes occurs in the nucleus. | b. | Introns are DNA
segments found within a gene but are not expressed. | c. | Exons are portions of a gene that are
ultimately expressed. | d. | Ribozymes are protein enzymes that remove
introns during RNA processing. |
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16.
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Which of these is happening when translation takes place?
a. | mRNA is still in the nucleus | b. | tRNAs are bringing amino acids to the
ribosomes | c. | rRNA is exposing its anticodons | d. | DNA is being replicated | e. | All of these are
correct |
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17.
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Which of these is true concerning translation?
a. | Each polypeptide is synthesized one amino acid at a time. | b. | The amino acids are
joined by RNA polymerase at the same time. | c. | Each ribosome is responsible for adding a
single amino acid to each polypeptide. | d. | The same type of polypeptide often contains a
different sequence of amino acids. | e. | All of these are
true. |
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18.
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Which of the following is NOT correct?
a. | mRNA is produced in the nucleus and processed in the cytoplasm. | b. | Several ribosomes
move along mRNA at a time. | c. | DNA has a triplet code, and each triplet stands
for an amino acids. | d. | tRNA brings amino acids to ribosomes, where
they contribute to polypeptide formation. |
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19.
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If the triplet code in DNA is TAG, what is the anticodon?
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20.
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The substitution of histidine for tyrosine will have little effect if
a. | the shape of the protein does not change. | b. | the active site does
not change. | c. | histidine and tyrosine have similar properties. | d. | All of these are
correct. |
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Short Answer
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21.
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What is the significance of a universal genetic code throughout the kingdoms of
life?
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22.
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Why is control of protein synthesis advantageous to the cell, compared to other
kinds of molecules?
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