The genetic code, which specifies the three-letter codons that specify particular amino acids, is said to be redundant because ________
A) amino acid sequences are produced by different alleles
B) it is observed in virtually all know organisms
C) one codon can code for more than one amino acid
D) phenotypic variation is observed depending on the codon usage
E) some amino acids are coded for by more than one codon
E
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Mixed cultures are also referred to as contaminated cultures.
Answer the following statement true (T) or false (F)
You have been advised to check your pulse during exercise in order to monitor your heart rate. What is happening in your heart as your pulse is produced?
A) ventricular diastole B) atrial diastole C) the aortic valve and pulmonary valves are closing D) ventricular systole E) atrial systole
The eukaryotic cell membrane is a bilayer of sterols.
Answer the following statement true (T) or false (F)
Homologous chromosomes pair up to form a structure called a:
A) tetrad. B) sister chromatid. C) homologue. D) haploid.