Which procedural step in DNA purification below is required for eukaryotic cells but not
prokaryotic cells?
A) Ethanol precipitation
B) Addition of EDTA
C) Centrifugation to pellet the nucleus
D) Phenol:chloroform extraction
E) Addition of detergent (Triton-X, SDS, etc.)
C
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While working at a family practice physician's office, the LPN would counsel clients taking over-the-counter decongestants if they were also taking which of the following?
A. MAO inhibitors B. Barbiturates C. Beta-blockers D. Seizure medications E. Histamine blockers F. Calcium-containing antacids
Worldwide, cancer might become the leading cause of death because
a. environmental hazards are more prevalent. b. physical activity levels are decreasing. c. tobacco use is increasing. d. sanitation is becoming poorer.
Write the correct abbreviation for blood groups:
What will be an ideal response?
________ regulate the balance between sodium and potassium.
A. Mineralocorticoids B. Vasopressors C. Phagocytes D. Glucocorticoids