Question

value: 11
all mutations are harmful.
true
false
value: 11
what increase the risk of mutations in dna?
a. smoking
b. alcohol
c. pesticides
d. free radicals
e. all of these
value: 11
the type of mutation where a single letter is changed and the protein sequence is terminated.
a. silent mutation
b. missense mutation
c. nonsense mutation
d. insertion
e. inversion
f. translocation

Explanation:

1. Mutations can be beneficial, neutral or harmful, so the statement "All mutations are harmful" is false.
2. Smoking, alcohol, pesticides and free - radicals can all damage DNA and increase the risk of mutations.
3. A nonsense mutation changes a single base pair to a stop codon, terminating the protein sequence.

Answer:

1. B. False
2. E. All of these
3. C. Nonsense Mutation