BIO 350 Final Exam Questions and Answers Solved Correctly Latest 2025-2026
Frameshift mutations often result from ____________________.
A) neutral substitutions
B) transitions
C) revertants
D) transversions
E) insertions - Answers E
Compared to a nucleotide, a nucleoside is lacking _______________________."
A) a purine base
B) a sugar
C) a phosphate
D) a hydroxyl group
E) a pyrimidine base - Answers C
During translation, the genetic code is read from mRNA in nucleotide triplets called __________."
A) codons
B) open reading frame
C) mRNA
D) anticodons
E) unidentified reading frame - Answers A
What is the result of the insertion or deletion of a single base in the coding sequence?
A) Frameshift
,B) An unidentified reading frame.
C) A new open reading frame.
D) A silent mutation.
E) A neutral mutation - Answers A
A mutation that completely eliminates gene function is a ______.
A) dominant mutation
B) gain-of-function mutation
C) neutral substitution
D) silent mutation
E) null mutation - Answers E
6. DNA replication is described as _________________.
A) parallel
B) semiconservative
C) unidirectional
D) conservative
E) continuous - Answers B
A single strand of DNA has ___ reading frames.
A) 1
B) 2
C) 3
D) 4
E) 6 - Answers C
,Very small circular RNA molecules that use rolling circle synthesis are _______________.
A) viroids
B) prions
C) virions
D) bacteria
E) viruses - Answers A
A mutation that acts solely by affecting the properties of the contiguous sequence of DNA is called a
__________
A) frameshift mutation
B) trans-acting mutation
C) cis-acting mutation
D) nonsense mutation
E) silent mutation - Answers C
An enzyme that synthesizes a nucleic acid strand is a ____________________.
A) RNase
B) exonuclease
C) DNase.
D) endonuclease
E) polymerase - Answers E
Which of the following enzymes is responsible for separating the two strands of DNA during replication?
A) Deoxyribonuclease
B) Polymerase
, C) Helicase
D) Primase
E) None of these. - Answers C
The substitution of a pyrimidine for a purine is called______.
A) A frameshift mutation
B) A mismatch mutation
C) Transversion
D) Transition
E) Suppression - Answers C
A codon consists of _____ nucleotides(s).
A) 1
B) 2
C) 3
D) 4
E) 6 - Answers C
What is a substitution of a purine for a purine specifically called?
A) A frameshift mutation
B) A mismatch mutation
C) Transversion
D) Transition
E) Suppression - Answers D
A restriction endonuclease __________________________.
Frameshift mutations often result from ____________________.
A) neutral substitutions
B) transitions
C) revertants
D) transversions
E) insertions - Answers E
Compared to a nucleotide, a nucleoside is lacking _______________________."
A) a purine base
B) a sugar
C) a phosphate
D) a hydroxyl group
E) a pyrimidine base - Answers C
During translation, the genetic code is read from mRNA in nucleotide triplets called __________."
A) codons
B) open reading frame
C) mRNA
D) anticodons
E) unidentified reading frame - Answers A
What is the result of the insertion or deletion of a single base in the coding sequence?
A) Frameshift
,B) An unidentified reading frame.
C) A new open reading frame.
D) A silent mutation.
E) A neutral mutation - Answers A
A mutation that completely eliminates gene function is a ______.
A) dominant mutation
B) gain-of-function mutation
C) neutral substitution
D) silent mutation
E) null mutation - Answers E
6. DNA replication is described as _________________.
A) parallel
B) semiconservative
C) unidirectional
D) conservative
E) continuous - Answers B
A single strand of DNA has ___ reading frames.
A) 1
B) 2
C) 3
D) 4
E) 6 - Answers C
,Very small circular RNA molecules that use rolling circle synthesis are _______________.
A) viroids
B) prions
C) virions
D) bacteria
E) viruses - Answers A
A mutation that acts solely by affecting the properties of the contiguous sequence of DNA is called a
__________
A) frameshift mutation
B) trans-acting mutation
C) cis-acting mutation
D) nonsense mutation
E) silent mutation - Answers C
An enzyme that synthesizes a nucleic acid strand is a ____________________.
A) RNase
B) exonuclease
C) DNase.
D) endonuclease
E) polymerase - Answers E
Which of the following enzymes is responsible for separating the two strands of DNA during replication?
A) Deoxyribonuclease
B) Polymerase
, C) Helicase
D) Primase
E) None of these. - Answers C
The substitution of a pyrimidine for a purine is called______.
A) A frameshift mutation
B) A mismatch mutation
C) Transversion
D) Transition
E) Suppression - Answers C
A codon consists of _____ nucleotides(s).
A) 1
B) 2
C) 3
D) 4
E) 6 - Answers C
What is a substitution of a purine for a purine specifically called?
A) A frameshift mutation
B) A mismatch mutation
C) Transversion
D) Transition
E) Suppression - Answers D
A restriction endonuclease __________________________.
