Apoint mutation changes a codon in an mrna molecule. will the mutation affect the polypeptide that forms? why?
a. yes. each amino acid is specified by only one codon.
b. no. the structure of dna, and not rna, determines the polypeptide
c. maybe. some codons are translated into two or more amino acids.
d. maybe. some sets of codons are translated into the same amino acid.

What mistake did john needham make that caused him to conclude that spontaneous generation for microorganisms occurred? a. he re-contaminated his boiled broth solutions. b. he destroyed the vital force in the solutions. c. he did not boil his broth solutions, only warmed them. d. he failed to seal his flasks of boiled broth. e. he allowed his assistant to conduct the experiment which he did not monitor closely.