What must be present in order to absorb calcium?
What will be an ideal response?
Vitamin D
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What is the main function of DNA helicase in DNA replication?
A. Proofreading the DNA molecule B. Adding complementary DNA bases to the newly forming DNA strand C. Fusing DNA fragments together D. Unzipping the DNA double helix
The site on an enzyme that will bind the substrate is called the
A) prosthetic group. B) catalyst. C) active site. D) metastable site. E) activation site.
The function of the malleus, incus, and stapes in the middle ear is to:
a. amplify the vibrations of sound waves. b. cause the organ of Corti to rub against the tectorial membrane. c. detect movement of the endolymph in the cochlear duct. d. relieve pressure differences between the middle ear and atmosphere. e. give support to the membranous labyrinth.
The vessel that collects blood from the superficial structures of the head and neck is the ________ vein.
A) external carotid B) internal carotid C) external jugular D) internal jugular E) All of the answers are correct.