ASU BIO 181 PRACTICE TEST 2026
QUESTIONS WITH ANSWERS GRADED A+
◉During DNA replication in the lagging strand there is production of
this component? ANSWER: - Okazaki fragment
◉How many "stop" codons exist? ANSWER: - 3
◉The double helix of DNA is wrapped about 1¾ times around which of
these components? ANSWER: - Nucleosome
◉Which enzyme unwraps the double helix? ANSWER: - Helicase
◉In the ribosome, what is the name of the bond that links one amino
acid to the next? ANSWER: - peptide bonds
◉List the two basic categories of nitrogenous bases in nucleic acids.
ANSWER: - purine and pyrimidine
◉In DNA, what does the nucleotide labeled as A pair with? ANSWER:
- Thymine
, ◉During DNA replication is greatly reduced by enzymes that proof read
the newly replicated DNA. ANSWER: - True
◉How many hydrogen bonds are there between an A and its paired
nucleotide? ANSWER: - 2
◉During mRNA maturation what is the name of the part of the mRNA
that is removed? ANSWER: - introns
◉DNA replication in eukaryotes is sped up by multiple origins of
replication. ANSWER: - true
◉RNA synthesis, also called RNA transcription occurs in three phases.
List them from beginning to end in order. ANSWER: - initiation,
elongation, termination
◉Which nucleotide is different in RNA compared to DNA? ANSWER:
- uridine
◉There are two types of protein synthesis in eukaryotic cells. These two
types can be distinguished because the polyribosome is either or .
ANSWER: - free; membrane bound
◉In eukaryotic cells the start codon for protein synthesis is . ANSWER:
- Aug
QUESTIONS WITH ANSWERS GRADED A+
◉During DNA replication in the lagging strand there is production of
this component? ANSWER: - Okazaki fragment
◉How many "stop" codons exist? ANSWER: - 3
◉The double helix of DNA is wrapped about 1¾ times around which of
these components? ANSWER: - Nucleosome
◉Which enzyme unwraps the double helix? ANSWER: - Helicase
◉In the ribosome, what is the name of the bond that links one amino
acid to the next? ANSWER: - peptide bonds
◉List the two basic categories of nitrogenous bases in nucleic acids.
ANSWER: - purine and pyrimidine
◉In DNA, what does the nucleotide labeled as A pair with? ANSWER:
- Thymine
, ◉During DNA replication is greatly reduced by enzymes that proof read
the newly replicated DNA. ANSWER: - True
◉How many hydrogen bonds are there between an A and its paired
nucleotide? ANSWER: - 2
◉During mRNA maturation what is the name of the part of the mRNA
that is removed? ANSWER: - introns
◉DNA replication in eukaryotes is sped up by multiple origins of
replication. ANSWER: - true
◉RNA synthesis, also called RNA transcription occurs in three phases.
List them from beginning to end in order. ANSWER: - initiation,
elongation, termination
◉Which nucleotide is different in RNA compared to DNA? ANSWER:
- uridine
◉There are two types of protein synthesis in eukaryotic cells. These two
types can be distinguished because the polyribosome is either or .
ANSWER: - free; membrane bound
◉In eukaryotic cells the start codon for protein synthesis is . ANSWER:
- Aug
