An organism that is neither prokaryotic nor photosynthetic, and must obtain its nutrients by secreting digestive
enzymes into the environment, belongs to which group of organisms?
a. Bacteria
b. protists
c. Fungi
d. Plantae
e. Animalia
c
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How is the activity of a riboswitch controlled?
A) by other riboswitches B) metabolite binding can change its structure C) sigma factor binding alters its structure D) small RNA complementary binding disrupts its function
Place the following events of an inflammatory event in response to bacterial infection in proper order
1. Activated complement binds to bacteria. 2. Capillary permeability increases. 3. Phagocytes engulf bacteria. 4. Mast cell receptors bind to bacterial antigens. 5. Signaling molecules cause arterioles to widen.
a. 4-5-2-1-3 b. 4-3-1-2-5 c. 5-2-1-4-3 d. 1-3-4-2-5 e. 5-2-4-1-3
Which of the following is not considered a barrier to entry of a pathogen?
A. intact skin B. acid pH of stomach C. sebaceous secretions D. mucous membranes E. inflammatory response
Which of the following typically connects a bone to another bone?
A) ligaments B) marrow C) tendons D) cartilage