A mutation that changes a codon sequence, and subsequently changes the amino acid that should have been placed at that point in the polypeptide chain, is a
A) frameshift mutation.
B) missense mutation.
C) silent mutation.
D) nonsense mutation.
B) missense mutation.
A mutation that changes a codon sequence, and subsequently changes the amino acid that should have been placed at that point in the polypeptide chain, is a missense mutation.
You might also like to view...
In order for high level expression of the E. coli lac operon to occur, a complex of catabolite activator protein and ________ must be bound to the DNA near the promoter.
Fill in the blank(s) with the appropriate word(s).
Using the genetic code shown here, predict what type of mutation has occurred in the hemoglobin sickle-cell anemia allele.
Normal allele 5'–GGAAUGAAACAGGAACCC–3'
Mutant allele 5'–GGAAUGAAACAGGUACCC–3'
A. a point mutation, Val to Glu
B. addition of a new stop codon
C. a frameshift mutation
D. a point mutation, Glu to Val
E. a silent mutation
Sperm mature and are stored in the epididymis
a. True b. False
Which of the following viruses can establish a chronic infection of the liver which may progress to liver cancer?
A. hepatitis A B. HTLV-1 C. hepatitis C D. hepatitis D E. hepatitis E