Magine that a researcher is comparing the sequence of several protein-coding genes among mice, rabbits, and humans. she finds that, for most of these genes, the rabbit sequences are more similar to the human sequences than are the mouse sequences. what can she deduce? no similar proteins exist in mice and humans. more sequences are conserved between rabbits and humans than between humans and mice. humans and mice do not share a common ancestor. mice and rabbits do not share a common ancestor. mice and humans share a more “recent” common ancestor than do rabbits and humans.

protocol for imps extraction focusing on membrane protein extraction, solubilisation, and purification.

c.more precipitation,but only when emission levels.

the answers are as following:

1. c. double helix, nucleosome, coil, supercoil, chromosome

2. b. g2 phase, preparation for mitosis

3. d. interphase consists of the g1, s, and g2 phases

4. c. metaphase

5. a. chromosomes are duplicated before cell division so that each new daughter cell has a complete set

it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.