Which of the following occurs in the nucleus?
A) Transcription only
B) Both translation and replication of genetic material
C) Both transcription and replication of genetic material
D) Translation only
E) Replication of genetic material only
C
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The filtration step in the formation of urine for animals sorts materials only by
A. overall size with cells and proteins usually being kept out of the filtrate. B. whether they are charged or not. C. whether the substance in question is a waste product or not. D. whether they contain nitrogen or not. E. the hydration state of the body.
Which of the following statements is not true of the amino acids?
A) There are more than 60 different kinds of amino acids present in cells. B) The R group of amino acids differs from one amino acid to another. C) Only around 20 amino acids are used in protein synthesis. D) All amino acids exist in two stereoisomeric forms. E) Amino acids have an N-terminus, C-terminus, and R groups.
Hepatitis A spreads via
A. the respiratory route. B. blood transfusion. C. body fluids. D. the fecal-oral route.
Which of the following is acquired when amoebas are forced into human nasal passages during swimming?
A. Entamoeba histolytica B. Toxoplasma gondii C. Naegleria fowleri D. Balantidium coli E. Giardia lamblia