What is a mutagen?
A. An agent that causes an immunodeficiency
B. An agent that causes an allergic response
C. An agent that causes cancer
D. An agent that causes a genetic mutation
Answer: D
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Which of the following descriptions best matches the term external intercostal?
A) accessory muscle of expiration B) accessory muscle of inspiration C) primary muscle of inspiration D) primary muscle of expiration E) an accessory muscle for both expiration and inspiration
Modification and packaging of proteins with other molecules is done by the
A) ribosome. B) nucleolus. C) smooth endoplasmic reticulum. D) Golgi apparatus. E) nucleus.
Atom X has 17 protons. How many electrons are in its valence shell (outermost energy level)?
A) 7 B) 3 C) 5 D) 10
The corpus callosum interconnects the
a. brain stem and cerebellum b. brain stem and diencephalon c. hypothalamus and thalamus d. two cerebral hemispheres e. cerebellum and spinal cord