Which of the following is a nucleic acid with a double helix structure?
a. DNA
b. RNA
c. both A and B above
d. neither A nor B above
a. DNA
Anatomy & Physiology
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The space that is surrounded by the tissue wall of hollow organs is known as
A) the extracellular space. B) the peritoneal cavity. C) the tract. D) the lumen. E) the epidural space.
Anatomy & Physiology
The respiratory system provides a route for water and heat elimination
Indicate whether the statement is true or false
Anatomy & Physiology
What type of joint is a ball-and-socket joint?
A) multiaxial (triaxial) joint B) biaxial joint C) nonaxial joint D) uniaxial joint
Anatomy & Physiology
What enzyme breaks down acetylcholine into acetic acid and choline to prevent continued contraction of the muscle fiber?
A) potassium ions B) cross bridges C) calcium ions D) sarcoplasmic reticulum E) acetylcholinesterase
Anatomy & Physiology