Which one of the following is a major constituent of biological membranes, nucleic acids, and cellular energy transfer systems?
A. Potassium
B. Phosphorous
C. Selenium
D. Cobalt
Answer:B
Which one of the following is a major constituent of biological membranes, nucleic acids, and cellular energy transfer systems?
A. Potassium B. Phosphorous C. Selenium D. Cobalt