With regard to the semipermeable nature of the plasma membrane, which of the following would readily cross without the aid of a transport protein?
A) calcium ions
B) glucose
C) water
D) amino acids
E) DNA
C) water
Biology & Microbiology
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A naked virus only has a/an ________.
A. nucleocapsid B. capsomere C. antigenic surface D. envelope
Biology & Microbiology
The large, fluid-filled spaces within the brain are called the:
a. choroid plexus. b. ventricles. c. meninges. d. pia mater.
Biology & Microbiology
Why are archaeans more tolerant of extreme environmental conditions than bacteria?
What will be an ideal response?
Biology & Microbiology
The sun's energy is produced by:
a. nuclear fission reactions. b. nuclear fusion reactions. c. electromagnetic radiation. d. ultraviolet radiation. e. infrared radiation
Biology & Microbiology