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- 1. Multiple Choice
The monomers units of DNA and RNA are
amino acids
monosaccharides
nucleotides
fatty acids
- 2. Multiple Choice
The signal that marks the end of a gene and causes transcription to stop is
polymerase
ligase
a terminator
methionine
- 3. Multiple Choice
Which of the following enzymes catalyzes the linkage together of RNA nucleotides to form RNA?
polymerase
ligase
ribozyme
reverse transcriptase
- 4. Multiple Choice
The RNA codon AUG means
add amino acid methionine
start the protein here
add the amino acid tyrosine
end the polypeptide chain here
- 5. Multiple Choice
Experiments have demonstrated "the words" of the genetic code are
single nucleotides
two nucleotide sequences
3 nucleotide sequences
enzymes
- 6. Multiple Choice
The transfer of genetic info from DNA to RNA is called
translation
transcription
initiation
elongation
- 7. Multiple Choice
Which of the following sequences best describes the flow of information that takes place when a gene directs the synthesis of a cellular component?
RNA-DNA-RNA-PROTEIN
DNA-RNA-PROTEIN
PROTEIN-RNA-DNA
DNA-AMINO ACID-RNA-PROTEIN
- 8. Multiple Choice
Translation consists of which of the following?
conversion of genetic info from the language of nucleic acids to the language of proteins
conversion of genetic info from DNA to RNA
addition of nucleotides to a DNA template
DNA replication
- 9. Multiple Choice
Which of the following is required for translation to occur?
energy
ribosomes
tRNA
all of these
- 10. Multiple Choice
Which of the following occurs when RNA polymerase attaches a promoter DNA?
elongation of mRNA
termination of mRNA
initiation of a protein
initiation of mRNA
- 11. Multiple Choice
The info carried by DNA is in
an amino acid sequence
the sugars and phosphates that form the backbone
the order of bases in the molecule
the total number of nucleotides
- 12. Multiple Choice
A gene is
the same as a chromosome
the info for making a polypeptide
made of RNA
made of protein
- 13. Multiple Choice
During the process of translation, ____ matches a nucleic acid codon with the proper amino acid.
a ribosome
ATP
polymerase
mRNA
- 14. Multiple Choice
When RNA is being made, the RNA base ____ always pairs with the base ___ in DNA.
U-T
T-G
U-A
A-U
- 15. Multiple Choice
A mutagen is
a gene that has an altered mutation
something that causes a mutation
any change in a nucleotide sequence of DNA
the portion of the chromosome altered by the mutation
- 16. Multiple Choice
tRNA plays a role in which of the following ?
picking up the amino acid specified by the anticodon
recognizing the appropriate codons in mRNA
translating codons into amino acids
all of these are correct
- 17. Multiple Choice
Any change in the nucleotide sequence of a gene is called
a mutation
a codon
a translation
an anticodon
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