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- 1. Multiple Choice
The first step in transcription is
Messenger RNA exits the nucleus.
DNA is “unzipped” by special enzymes in the nucleus.
DNA re-winds into a double helix.
Messenger RNA is created by complementary base pairing to a single DNA strand.
- 2. Multiple Choice
What happens to mRNA prior to translation?
All of the exons are removed and discarded.
The mRNA molecule is made from a protein template.
Introns are cut from the mRNA and the exons are spliced together.
The mRNA molecule is replicated.
- 3. Multiple Choice
Methionine is indicated by the nucleotide sequence_______, which is a ______.
TAC; amino acid
UAA; RNA sequence
UAG; stop codon
AUG; start codon
- 4. Multiple Choice
The process of building protein molecules from the genetic information in an mRNA blueprint is called
transcription
translation
replication
polypeptide
- 5. Multiple Choice
After DNA replication, the resulting strands of the double helix are
complementary
identical
proteins
never replicated again
- 6. Multiple Choice
In eukaryotes,
transcription takes place in the cytoplasm, and translation takes place in the nucleus.
transcription takes place in the nucleus, and translation takes place in the cytoplasm.
transcription and translation both take place in the nucleus.
transcription and translation both take place in the cytoplasm.
- 7. Multiple Choice
The main enzyme involved in linking individual nucleotides into DNA molecules is
DNA protease
ribozymes
carbohydrates
DNA polymerase
- 8. Multiple Choice
How many nucleotides are needed to specify three amino acids?
3
6
9
12
- 9. Multiple Choice
During translation, the type of amino acid that is added to the growing polypeptide depends on the
codon on the mRNA and anticodon on the rRNA
anticodon on the mRNA and the anticodon on the tRNA
anticodon on the rRNA and the codon on the mRNA
codon on the mRNA and the anticodon on the tRNA
- 10. Multiple Choice
The process by which the genetic code of DNA is copied into a strand of mRNA is:
translation
transcription
transformation
replication
- 11. Multiple Choice
Each combination of three nitrogenous bases on messenger RNA forms a(an):
anticodon
enzyme
codon
nucleic acid
- 12. Multiple Choice
A DNA sequence is ATGCCAGTA. The new strand of DNA that is made will have which sequence?
ATGCCAGTA
TACGGTCAT
UACGGUCAU
TACTGGCAT
- 13. Multiple Choice
What must be transmitted to new DNA strands during replication to maintain genetic information?
individual atoms from existing DNA strands
individual sugars from existing DNA strands
the sequence of bases from existing DNA strands
the sequence of phosphates from existing DNA strands
- 14. Multiple Choice
Before a cell divides, it must duplicate its DNA in a process known as:
translation
transcription
transformation
replication
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