Refer to Figure 13-2. The portion of the molecule labeled 5 is:
a. the attached amino acid.
b. a double-stranded region.
c. a single-stranded region.
d. the anticodon.
e. the codon.
A
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If an organism is diploid and a certain gene found in the organism has eighteen known alleles (variants), then any given organism of that species can/must have which of the following?
A) at most, two alleles for that gene B) up to eighteen chromosomes with that gene C) up to eighteen genes for that trait D) a haploid number of nine chromosomes E) up to, but not more than, eighteen different traits
In the picture below, how many chromosomes are present?
A. 92 B. 22 C. 46 D. 23
The alimentary canal is ________.
A. the accessory organs B. the esophagus C. the small and large intestines D. the series of digestive organs
Cilia and flagella of eukaryotic cells are composed of:
A. nine triplets of microtubules in a circle. B. actin filaments in a 9 + 2 arrangement. C. protein fibers in a helical arrangement. D. microtubules in a 9 + 2 arrangement.