Which of the following DOES NOT MATCH?
A. Endospore===dormant form of life that resist elements
B. Pili===helps bacteria attach to host surface
C. they all match
D. Plasmid===helps transfer genetic material between bacteria
E. Capsule===helps bacteria resist phagocytosis
Ans: C. they all match
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An organized unit of DNA sequences that enables a segment of DNA to be transcribed into RNA and ultimately results in the formation of a functional product is called a _______.
A. chromosome B. trait C. allele D. gene E. expression
Which of the following comparisons between the moss life cycle and fern life cycle are valid?
_____ Mosses have flagellated sperm that need water the reach the female gamete, while the sperm of ferns are unflagellated and are not dependent on water. _____ The sporophyte generation is smaller than the gametophyte generation in mosses, but the sporophyte generation is much larger than the gametophyte generation in ferns. _____ The spores are produced in capsules on stalks in mosses but in small structures called sori on the underside of leaves in ferns. _____ The gametes are produced in gametangia in mosses but in specialized structures on the underside of leaves in ferns. _____ Both kinds of plants depend on wind for dispersal of spores.
Cell biology emerged from which of the following fields of biology?
A) biochemistry B) cytology C) genetics D) biochemistry, cytology, and genetics E) cytology and biochemistry
In the experiment in which Frye and Edidin fused the plasma membranes of a mouse and a human cell, what happened
to the membrane proteins? a. They formed a bilayer. b. They formed a spherical structure. c. They moved laterally across the cell surface. d. They flip-flopped from one layer to the other. e. They reacted with cholesterol molecules on the membrane surface.