The Angel Oak on Johns Island, South Carolina is estimated to be up to ____ years old
a. 300
b. 1000
c. 1400
d. 2000
e. 2400
ANSWER: c
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What is the fundamental concept that causes gel electrophoresis to work?
A. Different proteins have different charges and sizes. B. Different proteins respond differently to dyes in a gel electrophoresis. C. Some proteins are enzymes and will react with molecules in the gel. D. All proteins have the same charge and will move through the gel at the same speed. E. All proteins will react with a dye to produce a band.
How does the reproduction of HIV and lambda phage differ?
A. HIV contains reverse transcriptase enzyme, while lambda phage does not. B. Immediately after HIV enters the cell, reverse transcriptase RNA is transcribed into DS DNA. Lambda phage reverse transcriptase DNA is integrated immediately into the host genome. C. HIV contains integrase, while lambda phage does not. D. HIV attaches to specific proteins on the cell surface, while lambda phage does not. E. Lambda phage attaches to specific proteins on the cell surface, while HIV does not.
The tissue that is used for defense against bacteria and other foreign agents is the
a. spleen. b. tonsil. c. liver. d. thymus. e. lymph node.
Plants are thought to have evolved from a group of algae known as:
a. red algae. b. cyanobacteria. c. charophytes. d. dinoflagellates. e. diatoms.