Plants called legumes have chambers in their roots that house nitrogen-fixing bacteria. Nitrogen-fixing bacteria get both a place to live and energy while supplying nitrogen to a plant. What is this ecological relationship called?
A) Competition B) Parasitism C) Succession D) Predation E) Mutualism
E
Biology & Microbiology
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In this figure showing SDS-PAGE of the progressive stages of glycine N-methyltransferase purification, the 14,000 MW protein most likely disappears from the sample because gel-exclusion chromatography differentiates proteins by:
A. charge-to-mass ratio. B. mass. C. charge. D. solubility. E. specific affinity to resin.
Biology & Microbiology
____ is the tendency of water molecules to stay
attached to one another.
a. Adhesion b. Cohesion c. Fusion d. Interaction e. Junction
Biology & Microbiology
The chromosomal designation for a human female is
What will be an ideal response?
Biology & Microbiology
Cell membranes consist mainly of a __________.
A) carbohydrate bilayer and proteins B) protein bilayer and phospholipids C) lipid bilayer and proteins
Biology & Microbiology