All microbicidal agents are sterilants.
Answer the following statement true (T) or false (F)
False
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Sodium ions are single atoms. Why can't they simply diffuse through the cell membrane's lipid bilayer?
A. Since they are charged, ions can't cross the hydrophobic center of the membrane without a channel or pump. B. Sodium ions are covalently attached in groups of three, which are too large to diffuse easily. C. Ions do traverse the membrane easily, but the sodium-potassium pump moves them back across. D. Chelator proteins capture any ions that start to cross the bilayer.
Erwin Chargaff's research determined the composition of the nitrogen bases within a strand of DNA. His work determined that
A. the percent of adenine is equal to the percent of thymine and the percent of cytosine is equal to the percent of guanine. B. the concentrations of adenine, thymine, guanine, and cytosine are all equal. C. the concentration of adenine is twice the concentration of thymine and the concentration of cytosine is twice the concentration of guanine. D. the percent of adenine is equal to the percent of guanine and the percent of cytosine is equal to the percent of thymine.
Discuss the role the brush border of the intestinal cells plays in the final digestive and absorptive steps of
carbohydrates, proteins and fats. What will be an ideal response?
Which type of radiation has enough energy to remove electrons from atoms?
a. x-rays b. magnets c. radio waves d. visible light e. microwaves