A scientist is studying a parent strand of 7 base pairs of DNA (14 total nucleotides), and she is able to determine that the strand has 4 Adenines, and 3 Guanines. Using that information, which choice accurately describes how many Thymines and Cytosines are in the parent strand of DNA that she is studying? a 3 Thymines, 4 Cytosines b 4 Thymines, 3 Cytosines c 3 Thymines, 3 Cytosines d 4 Thymines, 4 Cytosines

All living organisms are composed of a. only one cell. b. at least 100 cells. c. at least three cells. d. one or more cells.

Most animal cells membranes have proteins that pump ions out of the cell and potassium ions into the cell

Imagine a self-reactive t cell that has not undergone clonal deletion in the thymus (that is to say, it has escaped central tolerance). if it encounters self antigen in the absence of an infection or inflammation, what will happen to this self-reactive t cell? (select two answers) (a) the t cell undergoes clonal expansion. (b) the t cell gains effector functions. (c) the t cell undergoes apoptosis. (d) the t cell becomes activated. (e) the t cell becomes anergic.