Protists are a diverse group of organisms. Which of the following is not characteristic of protists?
1.May be multicellular or unicellular.
2.May have DNA in a plasmid or in a nucleus.
3.May reproduce sexually or asexually.
4.May be autotrophs and/or heterotrophs.
2
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The polymerase chain reaction (PCR) has been used in all of the following fields, except
A. gene mapping. B. medicine. C. forensics. D. evolutionary studies. E. None of the choices; it is useful for all these fields.
The most likely identification of a bile-resistant, kanamycin-resistant, colistin-resistant, and vancomycin-resistant anaerobic gram-negative bacilli is:
a. nonpigmented Prevotella. b. Porphyromonas spp. c. B. fragilis group. d. Fusobacterium spp.
Light-independent reactions occur in the ____
a. cytoplasm b. chloroplast outer membrane c. thylakoid membrane d. stroma e. matrix
The oxygen-carrying component in red blood cells is
A) hemoglobin. B) bicarbonate ions. C) iron atoms freely floating in the blood plasma. D) the cell membrane.