I got the following questions wrong on a test/assignment. Can someone let me know what the correct answers are so I have the correct information for my final exam. Thx
#1 Deletions, insertions, and frameshift mutations are more serious than a point mutation because
A. mis-sense mutations result in more malfunction than nonsense mutations
B. more than one gene is affected as a chromosome mutates
C. the entire reading of codons is altered, nonsense results, and no functional proteins can be synthesized
D. they remain hidden from gel electrophoresis and DNA fingerprinting
#2 Deletions and insertions result in a
A. substitution and induced mutation
B. frameshift mutation and mis-sense
C. frameshipf mutation and nonsense
D. substitution and a silent mutation
Hint: A deletion in chromosome 5 causes the genetice disorder: Cri du Chat Syndrome. Individuals have severe mental retardation and a very low birth-weight. Individuals are very, small often having to use clothes the size of dolls. They have a characteristic cat-like cry.
#3 A randon change in DNA that occurs naturally is called a
A. induced mutation
B. spontaneous mutation
C. mis-sense mutation
D. nonsense mutation
#4
All the following are examples of physical mutagens except
A. gamma rays
B. nitrates, benzene, gasoline fumes, PCB's
C. high energy X-rays
D. ultra violet rays
#5 By causing physical damage to a cellular component, X-rays, ionizing radiation, or chemicals can cause mutations. The site of this damage is
A. the nuclear membrane
B. one or more nucleotides in the DNA molecule
C. one or more amino acids in the crucial enzyme
D. the protein structure of the ribsome
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