1. There are 20 primary amino acids specified by the genetic code. Which step in

Question

1. There are 20 primary amino acids specified by the genetic code. Which step in the translation process requires a separate and specific enzyme for each amino acid?

A) joining an individual amino acid to its specific tRNA

B) Delivering aminoacyl-tRNAs to the ribosome

C) initiation translation

D) Peptide bond formation

E) Translocation of the ribosome to the next codon along the mRNA

2. Two true breeding pea plants are crossed, one with purple flowers and the other with white. Their offspring are

A) heterozygous with the dominant phenotype

B) homozygous with the recessive phenotype

C) a mixture of purple and white flowers with varying genotypes

D) still true-breeding, with the same parental genotypes

3. In a "frameshift" mutation

A) May be caused by an addition or deletion of one or more nucleotides

B) the codon that mutates causes change in the amino acid specified

C) The codon that mutates cause a stop codon to occur instead of the placement of an amino acid

D) The mutation does not occur in a codon

E) The mutation is not in DNA

Explanation / Answer

Answers:1)A

               2)A

              3)A

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