91Ó°ÊÓ

Show mathematically why there are 64 possible triplet codons.

Outline how the genetic message in a gene is translated to produce a polypeptide. Include the roles of the gene, messenger RNA, ribosomes, and transfer RNA.

It is your job to manufacture polymers from a series of monomer units. These monomer units are called \(\mathrm{A}, \mathrm{B}\), and \(\mathrm{C}\). In this problem you need to "build" polymers by linking the monomer units. Represent the polymer linkages using dashes. For example, \(-\mathrm{A}-\mathrm{B}-\mathrm{C}-\) represents a polymer unit made from linking monomer units A, B, and C. a. Build two different homopolymers from your monomer units. b. Build a copolymer from A and B. c. Build a copolymer that is about \(33 \% \mathrm{C}\) and \(66 \% \mathrm{~A}\).

Give one of the nucleotide sequences that would translate to the peptide lys- pro-ala-phe-trp-glu-his-gly.

Teflon is an addition polymer of \(1,1,2,2\) -tetrafluoroethene. Write the equation for the formation of the polymer.

Poly(vinyl chloride) (PVC) is an addition polymer of vinyl chloride, \(\mathrm{CH}_{2}=\mathrm{CHCl}\). Write the equation for the formation of the polymer.

Write the structural formula of a dipeptide formed from the reaction of \(\mathrm{L}\) -alanine and \(\mathrm{L}\) -histidine. How many dipeptides are possible?

Write the structural formulas of two tripeptides formed from the reaction of \(\mathrm{L}\) -tryptophan, \(\mathrm{L}\) -glutamic acid, and L-tyrosine. How many tripeptides are possible?

If adenine, thymine, guanine, and cytosine were each analyzed separately in a sample of DNA, what molar ratios of A: \(\mathrm{T}\) and \(\mathrm{G}: \mathrm{C}\) would you expect to find?

If a sample of DNA isolated from a microorganism culture were analyzed and found to contain \(1.5 \mathrm{~mol}\) of cytosine nucleotides and \(0.5 \mathrm{~mol}\) of adenosine nucleotides, what would be the amounts of guanine and thymine nucleotides in the sample?