Which of the following is a method of gene amplification that involves complementary primers and uses heat to unzip DNA to make multiple copies of a particular gene?
A) sticky ends B) vector
C) polymerase chain reaction D) recombinant
Answer: C
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The recent emergence of epidemic multidrug-resistant strains of M. tuberculosis, in conjunction with the end of the downward trend of reported cases of tuberculosis in the United States, has been largely attributed to:
a. human immunodeficiency virus (HIV) epidemic. b. ineffective treatment regimens. c. political factors. d. shortened treatment regimens.
When a substance is reabsorbed by the kidney, it moves from the nephron tubule into the ____
a. glomerulus b. peritubular capillaries c. afferent arteriole d. efferent arteriole e. renal artery
An electrocardiogram is used to
A) measure the amount of blood leaving the heart with each contraction. B) measure the electrical activity of the heart. C) listen to heart sounds. D) correct a heart murmur. E) initiate angina pectoris.
Using terms from the list below, fill in the blanks in the following brief description of the experiment with Streptococcus pneumoniae that identified which biological molecule carries heritable genetic information
Some terms may be used more than once. Cell-free extracts from S-strain cells of S. pneumoniae were fractionated to __________________ DNA, RNA, protein, and other cell components. Each fraction was then mixed with __________________ cells of S. pneumoniae. Its ability to change these into cells with __________________ properties resembling the __________________ cells was tested by injecting the mixture into mice. Only the fraction containing __________________ was able to __________________ the __________________ cells to __________________ (or __________________ ) cells that could kill mice. carbohydrate lipid R-strain DNA nonpathogenic RNA identify pathogenic S-strain label purify transform Fill in the blank(s) with correct word