In RNA, the base ____ takes the place of the base thymine
a. deoxyribose
b. ribose
c. pentose
d. guanine
e. uracil
e
You might also like to view...
In the 1950s, Earl Sutherland and colleagues discovered that epinephrine ____
a. leads to release of a second messenger that ultimately results in hydrolysis of glycogen to glucose b. leads to release of a second messenger that lowers blood glucose by causing it to bind to liver cells c. interacts directly with the enzyme glycogen phosphorylase d. interacts directly with the cell membrane to help transport glucose into the cell e. is a signaling molecule that does not require a cell surface receptor
The use of the birth control pill increases the
risk for all of the following cancers except
a. breast. b. cervical. c. liver. d. ovarian. e. there is no exception
Which of the following plants fits the
description of having flagellated sperm, xylem and phloem, and a short-lived gametophyte?
a. peat moss b. pine tree c. rose d. horsetail e. more than one of these
Green fluorescent protein is used to
a. label antibodies. b. visualize proteins in living cells. c. photobleach other fluorescent proteins. d. label DNA sequences.