The cell cycle is
Fill in the blank(s) with the appropriate word(s).
Answer: a set of orderly stages that occur between one cell division and the next
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A 26-year-old woman has an odorous vaginal discharge, lower abdominal pain, and difficulty urinating. Vaginal secretions are collected and sent to the laboratory for examination 3 hours af-ter collection. No motile organisms are observed on the wet preparation; however, T. vaginalis is suspected. Which one of the following statements explains this discrepancy?
a. The infection is most likely bacterial; therefore a Gram stain should have been performed. b. The specimen should have been refrige-rated before examination; consequently, the organism was compromised. c. The time between collection and the mi-croscopic examination was prolonged, resulting in loss of motility. d. No discrepancy is present; this organism in nonmotile.
Which structure makes a protein a molecule that can perform a particular function?
a. primary b. secondary c. tertiary d. quaternary e. isomeric
New data about rRNA led to the three-domain system of classification.
Answer the following statement true (T) or false (F)
Which amino acid would you expect a tRNA with the anticodon 5?-CUU-3? to carry?
(a) lysine (b) glutamic acid (d) leucine (d) phenylalanine