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WGU D512 Exam 2 |40 Questions with Verified Answers,100% CORRECT
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WGU D512 Exam 2 |40 Questions with Verified Answers
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WGU D512 Exam 2 |40 Questions with Verified AnswersAll of the following statements regarding the amino acid codon to make a
polypeptide chain are true EXCEPT one. Which one is the EXCEPTION? A: Is made
up of four basic nucleotides; GATC
B: Is read in a sequence of three nucleotides
C: Can result in start codons and stop codons
D: Is read directly from the DNA strand - CORRECT ANSWER D
Mistakes in proofreading of the genetic codon can result in the introduction of a
mutation that prematurely terminates the polypeptide chain. This type of
mutation is called a ______ mutation.
A: missense
B: silent
C: nonsense
D: frameshift - CORRECT ANSWER C
All of the following statements are true EXCEPT one. Which one is the
EXCEPTION?
A: Alleles are different versions of a gene that control a trait.
B: Alleles can be dominant or recessive.
C: Alleles are not passed from mother to fetus.
D: Alleles alter the phenotype of an organism. - CORRECT ANSWER C
Organisms that have two copies of each chromosome are called?
A: Aneuploid
B: Diploid
C: Polyploidy
D: Haploid - CORRECT ANSWER B
DNA replication can result in the introduction of double mutations. Choose the
correct statement?
A: Double mutations can occur on the same gene or multiple genes
B: Double mutations can suppress or activate phenotypes
, C: Double mutations can lead to synthetic lethality
D: All of the above - CORRECT ANSWER D
During a mouse breeding experiment, a heterozygous female mouse was crossed
with male mouse that was heterozygous for the same allele. What do you expect
to see in the F1 progeny (first generation)?
A: Half will be homozygotes and half will be heterozygotes
B: Three-fourths will be homozygotes and one-fourth will be heterozygotes
C: One-fourth will be homozygotes and three-fourths will be heterozygotes
D: All will be heterozygotes - CORRECT ANSWER A
Only one of the following restriction endonucleases can be used for direct blunt
end ligations into an appropriately cleaved vector. Choose the correct enzyme
(the cut site is indicated by the * in the recognition sequence)
A: TaqI (T*CGA)
B: EcoRV (GAT*ATC)
C: EagI (C*GGCCG)
D: NsiI (ATGCA*T) - CORRECT ANSWER B
Southern blotting is an in vitro technique used to detect?
A: DNA.
B: RNA.
C: Proteins.
D: Carbohydrates. - CORRECT ANSWER A
Which of the following statements best describes an autosomal recessive disease
(such as cystic fibrosis) in which the female parent is healthy but the male parent
has the disease?
A: Only male children will have the disease
B: Only female children will have the disease
C: All children will have the disease
D: All children will be carriers for the disease - CORRECT ANSWER D
Which of the following statements is TRUE regarding siRNA and shRNA?
A: siRNA blocks transcription while shRNA blocks translation
B: siRNA and shRNA block translation
C: siRNA blocks translation while shRNA blocks transcription
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