Protein x is a protein that is composed of four subunits of equal size--alpha, beta, delta, and gamma--that are bound by either noncovalent interactions or disulfide bridges. only the beta and delta subunits are bound to each other by disulfide bridges. how many bands would you expect to see in an sds page experiment in which beta-mercaptoethanol, a reducing agent, is used?

Describe pasteur’s results and how they disprove spontaneous generation.

Aresearcher has developed two stains for use with seed plants. one stains sporophyte tissue blue; the other stains gametophyte tissue red. if the researcher exposes pollen grains to both stains, and then rinses away the excess stain, what should occur? a) the pollen grains will be pure red. b) the pollen grains will be pure blue. c) the pollen grains will have red interiors and blue exteriors. d) the pollen grains will have blue interiors and red exteriors.

Epinephrine is a hormone released from the adrenal gland of the body, most often in a stressful situation. it is known as the "fight-or-flight" hormone. one way that it causes a response in the body is to activate receptors on muscle cells. where are these cellular receptors located? a. on the cell membrane b. in the nucleus c. on the cell wall d. around the mitochondria