Chromatin is:
A. A complex of DNA, proteins and some RNA
B. The form in which DNA is packed into the nucleus
C. The material which carries the genetic material of the cell
D. All of these are correct
Answer: D. All of these are correct
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The flexible proteins that link the cell membranes of squamous epithelial cells in skin are
A. cadherins. B. cellular adhesion molecules (CAMs). C. collagens. D. keratins.
Menstruation is the process of sloughing off the old functional layer of the
A) perimetrium. B) endometrium. C) epimetrium. D) myometrium. E) exometrium.
Your comprehension of these written words involves which of the following?
A. The Purkinje cells of the cerebellum B. The occipital lobe C. The postcentral gyrus D. The precentral gyrus E. The Wernicke area
When a bird ruffles its feathers in response to heat stress it
a. permits convective currents to carry heat away from the body surface. b. permits exchange of air with 100% humidity for air with lower humidity, enabling evaporative cooling to occur. c. both of these. d. neither of these.