The two purine nitrogen bases are adenine and guanine

a. True
b. False
Indicate whether the statement is true or false


True

Anatomy & Physiology

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Interferons, interleukins, and lymphokines are examples of:

A. chemical barriers. B. immune cells. C. immunoglobulins. D. mast cells. E. cytokines.

Anatomy & Physiology

Which structure is not associated with the secretion of proteins produced by ER?

a. golgi complex. b. smooth ER. c. transport vesicles. d. lysosomal membrane. e. plasma membrane.

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Phospholipids are important components of the plasma membrane. What does "B" represent on the diagram?

A. phosphorus B. oxygen C. nitrogen D. polar (hydrophilic) region E. nonpolar (hydrophobic) region

Anatomy & Physiology

A stimulus either causes an action potential or it doesn't. This is called ________.

A. a latent period response B. an all-or-none response C. a graded response D. a local response E. a relative refractory response

Anatomy & Physiology