Rhinovirus is an RNA virus that causes the common cold and sinus infections. The virus does not contain an envelope. Which of the following is true of a rhinovirus?
A. It does not contain genetic material.
B. It does not contain protein.
C. It does not contain lipid.
D. It does not contain protein or genetic material.
E. It does not contain lipid or protein.
C. It does not contain lipid.
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Viroids are naked (lacking a protein shell) pieces of DNA that infect plants
Indicate whether this statement is true or false.
What is the cyncytium?
a. rod-like structures discharged from mucus in free-living flatworms b. a layer of cells formed by nuclear division without cytokinesis c. a layer of fused cells that covers muscle layers in flatworms d. a nerve structure associated with photosensory cells in tapeworms
Match the cerebral lobe on the left with the correct function on the right.
Facilitated diffusion is limited by
A. the number of carrier proteins in the membrane. B. the size of the cell. C. size of the pores in the membrane. D. ATP concentration. E. osmotic pressure.