What process best characterizes Ca2+ movement from the cytosol (low Ca2+ concentration) into the endoplasmic reticulum (high Ca2+ concentration)?
A. Calcium movement is spontaneous.
B. Calcium movement involves active transport.
C. Calcium movement occurs by facilitated diffusion using a transporter protein.
D. Calcium movement does not require energy.
E. Calcium movement occurs by passive diffusion.
B. Calcium movement involves active transport.
You might also like to view...
Which is true about the invertebrates?
a. They are all deuterostomes. b. Among these animals, the initial indentation in the embryonic ball always becomes the anus. c. All invertebrates share bilateral symmetry. d. They include the simplest living animals. e. Invertebrates only have a simple backbone.
Which of the following antibacterial drug groups does not target protein synthesis?
A. Tetracyclines B. Aminoglycosides C. Oxazolidinones D. Sulfonamides E. Macrolides
If 15 percent of the nitrogenous bases in a sample of DNA from a particular organism is thymine, what percentage should be cytosine?
A) 30 percent B) 35 percent C) 70 percent D) 15 percent E) 40 percent
A plate inoculated with a 1:100 dilution of milk produced 30 colonies. How many organisms are in 1 ml of the undiluted sample?
A) 30 B) 300 C) 3000 D) 30000