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BIOL 121 JCCC Test 3: Questions & Complete Answers
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BIOL 121 JCCC Test 3: Questions & Complete Answers
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BIOL 121 JCCC Test 3: Questions & Complete AnswersThe monomers of DNA and RNA are... Right Ans - nucleotides
Which of the following statements regarding RNA is false? Right Ans - rna
uses the sugar dextrose
Which of the following statements regarding a DNA double helix is always
true? Right Ans - the amount of adenine is equal to the amount of thymine,
and the amount of guanine is equal to the amount of cytosine
If one strand of DNA is CGGTAC, the corresponding strand would be... Right
Ans - gccatg
Which of the following options best depicts the flow of information when a
gene directs the synthesis of a cellular component? Right Ans - dna ~ rna ~
protein
The transfer of genetic information from DNA to RNA is called.... Right Ans -
transcription
Experiments have demonstrated that the "words" of the genetic code (the
units that specify amino acids) are... Right Ans - 3-nucleotide sequences
The directions for each amino acid in a polypeptide are indicated by a codon
that consists of _____ nucleotide(s) in an RNA molecule. Right Ans - 3
We would expect that a 15-nucleotide sequence ending with a stop codon will
direct the production of a polypeptide that consists of... Right Ans - 4 amino
acids
In the genetic code, Right Ans - many amino acids are not specified by more
than one codon.
Which of the following enzymes catalyzes the linking together of RNA
nucleotides to form RNA? Right Ans - RNA polymerase
Where do transcription and translation occur in prokaryotic cells? Right
Ans - in the cytoplasm
, Which of the following statements about eukaryotic RNA is true? Right Ans
- exons are spliced together
Which of the following is a function of a tRNA molecule? Right Ans - joining
to only one specific type of amino acid
Which of the following statements about ribosomes is false? Right Ans - the
ribosomes of prokaryotes and eukaryotes are the same in structure and
function.
Which of the following statements regarding the flow of genetic information is
false? Right Ans - transcription occurs in the cytoplasm of eukaryotic cells.
Any change in the nucleotide sequence of DNA is called... Right Ans - a
mutation
Consider the following sentence: "The dog did not eat." Which of the following
variations of this sentence is most like a base substitution mutation? Right
Ans - the doe did not eat.
Consider the following sentence: "The dog did not eat." Which of the following
variations of this sentence is most like a reading frame mutation? Right Ans
- The dod idn ote at.
When the gene for a certain protein found in eukaryotic cells is transcribed
the RNA transcript starts out with 1821 RNA nucleotides. When the leaves the
nucleus it has 301 nucleotides, not counting a "cap" and "tail". The best
explanation for the difference in the size of the mRNA is which of the
following? Right Ans - removal of introns
Codons are non overlapping groups of 3 nucleotides in which molecule?
Right Ans - mrna
Which one of the following is true about frame shift mutations? Right Ans -
during translation, the resulting protein will generally be nonfunctional when
the mutated gene is translated
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