The nucleus of an atom contains ____

a. protons only
b. electrons only
c. neutrons only
d. protons and neutrons
e. protons and electrons


ANSWER: d

Biology & Microbiology

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In the final reaction of the blood clotting cascade, the soluble plasma protein _____ is converted to the insoluble protein ________, which then forms a network of fibers.

A. fibrin; prothrombin B. fibrinogen; fibrin C. thrombin; fibrin D. fibrinogen; thrombin E. prothrombin; thrombin

Biology & Microbiology

Which of the following is associated with asexual reproduction?

A) parthenogenesis B) hermaphrodites C) monoecious hermaphrodites D) monogamy

Biology & Microbiology

Blood pressure that is consistently ________ or higher would indicate that you have hypertension

A) 120/80 B) 140/90 C) 110/85 D) 100/75

Biology & Microbiology

What diffuses across the narrow synaptic cleft between the presynaptic axon and the postsynaptic cell to transmit a nerve impulse?

A. Electrical impulse B. Neurotransmitter C. Na+ ion D. Action potential E. Vesicle

Biology & Microbiology