Sidney Brenner found bacteriophage T4 point mutants in which a protein was prematurely terminated. The premature termination point of the protein was different in different mutants
When he determined where the protein synthesis terminated for each mutant, in every case the next amino acid of the protein would have been a glutamine, lysine, glutamic acid, tyrosine, or serine. What is the unique similarity of these amino acids or their codons that would play a role in the premature termination of translation in the mutant protein gene?
A. Each of the amino acids has an R-group containing an amine, hydroxyl, or carboxyl group.
B. Each of the codons for these amino acids contains either U or G.
C. Each of the codons for these amino acids could be changed to UAG with a single nucleotide mutation.
D. Each of the amino acids is polar and charged.
D
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Analysis of the nucleotide sequence of the genome of microorganisms has revealed important information about their metabolic potential.
Answer the following statement true (T) or false (F)
Sulfur occurs in all living matter primarily as a component of proteins
Indicate whether this statement is TRUE or FALSE.
Which of these enzymes is produced by cells in the tongue to break down triglycerides?
a. lipase b. lysozymes c. salivary amylase d. pepsin
Which of the following is the main form of nitrogenous wastes released by mammals to their
environment?
a. nitrate b. ammonia c. uric acid d. amino acids e. urea