Homework Help Classof1: 424 books

"In how many ways can a subcommittee of four be chosen from a Senate committee of four Democrats and six Republicans if (a) All members are eligible? (b) The subcommittee must consist of two Republicans and two Democrats? "

"1. Set X = {5, 7, 11, 13, 16,19},  Set Y = {1, 2, 5, 13, 19} a. What is the union of Sets X and Y? b. What is the intersection of Sets X and Y c. Create your own set Z that is a subset of Set X. "

"1. Explain BRIEFLY what it means when a nerve cell is RESTING. 2. Describe sodium-potassium pump. 3. Assume that a membrane is at resting potential and a stimulus is received thereby triggering an impulse. Describe BRIEFLY what would (or would not) happen if the passive Na+ channels were blocked...

"1. In the monosaccharide derivatives known as sugar alcohols, the carbonyl oxygen is reduced to a hydroxyl group. For example, D-glyceraldehyde can be reduced to glycerol. However, this sugar alcohol is no longer designated D or L. Why? 2. Lactose exists in two anomeric forms, however, no anomeric forms of sucrose have been reported. Why? "