Which cells cannot be used to produce a karyotype?
A. red blood cells
B. epithelial cells
C. skeletal muscle cells
D. white blood cells
E. smooth muscle cells
Answer: A
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The specimen of choice for detecting mycobacterium in a skin lesion or wound is a:
a. swab placed in Amie's transport medium or Stuart's medium. b. needle aspiration. c. skin scraping. d. swab placed in anaerobic conditions.
The movement of molecules across a membrane from an area of higher concentration to an area of lower concentration with the use of a carrier molecule embedded in the membrane is called
A. passive diffusion. B. active transport. C. facilitated diffusion. D. osmosis.
Prokaryotic cell walls consist of a network of polysaccharide molecules connected by cross-bridges of
A. ribosomes. B. lipids. C. other polysaccharides. D. chromosomal DNA. E. peptides.
The prokaryote operon model explains gene
regulation at the level of a. replication. b. transcription. c. transcript processing. d. transcript transport. e. translation.