BIO 181 Exam 2 2026 Questions and
Answers
True or False: DNA replication in eukaryotes is sped up by multiple origins of
replication - Correct answer-True
Which nucleotide is different in RNA compared to DNA? - Correct answer-Uridine
How many stop codons exist? - Correct answer-three
Which enzyme unwraps the double helix? - Correct answer-Helicase
What are the three phases of RNA Transcription(RNA synthesis)? - Correct
answer-Initiation, elongation, termination
Assume you have a eukaryotic cell with three chromosomes within it. How many
5' ends would there be? - Correct answer-6
For DNA polymerase III to work which of these components has to act first? -
Correct answer-Primase
True or False: Strands of the backbone of DNA are parallel - Correct answer-False
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, What is the start codon for protein synthesis in eukaryotic cells? - Correct answer-
AUG(methionine)
Which enzyme is used first to permit DNA polymerase III to begin replicating the
3' strand? - Correct answer-Primase
True or False: Uridine is a nucleotide in DNA. - Correct answer-FALSE
The double helix of DNA is wrapped about 1 3/4 times around which of these
components? - Correct answer-Nucleosome
Which strand is produced more rapidly? - Correct answer-Leading strand
Name the three types of post-translational modification - Correct answer-
Proteolysis, glycosylation, phosphorylation
True or False: RNA is single stranded - Correct answer-false
There are two types of protein synthesis in eukaryotic cells. These two types can be
distinguished because the polyribosome is either_________ or ___________. -
Correct answer-free or membrane bound
In the ribosome what is the name of the bond that links one amino acid to the next?
- Correct answer-peptide bond
During mRNA maturation what is the name of the part of mRNA that is removed?
- Correct answer-Intron
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Answers
True or False: DNA replication in eukaryotes is sped up by multiple origins of
replication - Correct answer-True
Which nucleotide is different in RNA compared to DNA? - Correct answer-Uridine
How many stop codons exist? - Correct answer-three
Which enzyme unwraps the double helix? - Correct answer-Helicase
What are the three phases of RNA Transcription(RNA synthesis)? - Correct
answer-Initiation, elongation, termination
Assume you have a eukaryotic cell with three chromosomes within it. How many
5' ends would there be? - Correct answer-6
For DNA polymerase III to work which of these components has to act first? -
Correct answer-Primase
True or False: Strands of the backbone of DNA are parallel - Correct answer-False
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
, What is the start codon for protein synthesis in eukaryotic cells? - Correct answer-
AUG(methionine)
Which enzyme is used first to permit DNA polymerase III to begin replicating the
3' strand? - Correct answer-Primase
True or False: Uridine is a nucleotide in DNA. - Correct answer-FALSE
The double helix of DNA is wrapped about 1 3/4 times around which of these
components? - Correct answer-Nucleosome
Which strand is produced more rapidly? - Correct answer-Leading strand
Name the three types of post-translational modification - Correct answer-
Proteolysis, glycosylation, phosphorylation
True or False: RNA is single stranded - Correct answer-false
There are two types of protein synthesis in eukaryotic cells. These two types can be
distinguished because the polyribosome is either_________ or ___________. -
Correct answer-free or membrane bound
In the ribosome what is the name of the bond that links one amino acid to the next?
- Correct answer-peptide bond
During mRNA maturation what is the name of the part of mRNA that is removed?
- Correct answer-Intron
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
