The accommodation of the very long DNA strands that are part of a chromosome into the limited space of the nucleus is achieved by coiling the DNA around beads of histones into repeating subunits. These DNA-wrapped histones are called:

A. Solenoids
B. Chromatin loops
C. Rosettes
D. Nucleosomes


Answer: D

Biology & Microbiology

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We maintain a fairly constant body temperature despite exposures to different seasons or external temperatures. This is achieved through our capacity to

A. adapt to changing environments. B. regulate body temperature. C. maintain homeostasis. D. All of these choices are correct. E. None of these choices are correct.

Biology & Microbiology

Intertidal chitons and snails use the ____ as a means of attachment to the rocks

a. foot b. mantle c. visceral mass d. head e. radula

Biology & Microbiology

Which of the following is NOT considered a peripheral lymphoid tissue?

A) bone marrow B) spleen C) appendix D) adenoids E) tonsils

Biology & Microbiology

Plasmodium falciparum produces proteins that cause ________ in addition to the anemia due to erythrocyte destruction

A) DIC B) toxemia C) black vomit D) capillary damage E) damage to the heart muscle

Biology & Microbiology