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12 years ago
) A.   For the following strand of DNA, write the bases for the complementary mRNA. Below that, draw the corresponding tRNA molecules.
      DNA:    GGC CTA CAA GCC GGA ACA GTT ACC GCG TAA CGA
      mRNA:   
      tRNA:

B.   What are the three-base sequences called on DNA, mRNA, and tRNA? Which molecule initially has the amino acids bound to it, and at what location on the molecule? List the amino acid sequence of the peptide coded by this DNA (see figure below).

C.   What do you notice about the relationship between the DNA and the anticodons? What do you notice about the genetic code for proline in the peptide?
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12 years ago
A.   

mRNA:   CCG GAU GUU CGG CCU UGU CAA UGG CGC AUU GCU
tRNA:   GGC CUA CAA GCC GGA ACA GUU ACC GCG UAA CGA

B.  The three-base sequences are triplets, codons, and anticodons, respectively. The amino acids are attached to the ends of the tRNA molecule, opposite the end with the anticodon. The amino acid sequence is:  pro asp val arg pro cys gln trp arg ile ala.

C.  The DNA triplets and the tRNA anticodons are identical except that U (in tRNA) substitutes for T (in DNA). In this peptide, proline was specified by two different codons, CCG and CCU.
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