The head of a sperm consists of the ________ and a cap of hydrolytic enzymes called the acrosome

Fill in the blank(s) with correct word


nucleus

Biology & Microbiology

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The choroid plexus functions to:

a. cushion the brain. b. control coordination of movement. c. produce the cerebrospinal fluid. d. transmit nerve impulses to specialized regions in the brain. e. divide the right and left hemispheres

Biology & Microbiology

What experimental evidence suggests that the N-terminal tails of histones participate in the formation of higher-order chromatin structure?

a) The tails cause histones to denature. b) Chromatin fibers prepared with H4 histones lacking their tails cannot fold into higher-order fibers. c) Chromatin fibers prepared with H4 histones possessing longer tails cannot fold into higher-order fibers. d) The tails when acetylated cause the dissolution of the 30-nm fibers. e) Chromatin fibers lacking tails are shorter.

Biology & Microbiology

Otoliths are involved in

A. balance. B. smell. C. taste. D. hearing. E. vision.

Biology & Microbiology

All of the following can lead to a positive tuberculin skin test EXCEPT

A) vaccination. B) current tuberculosis infection. C) previous tuberculosis infection. D) immunity to tuberculosis. E) being near someone with tuberculosis.

Biology & Microbiology