The negative logarithm of the hydrogen ion concentration in the solution is referred to as:
A. pH
B. atomic mass
C. -OH concentration
D. electronegativity
E. specific heat
A. pH
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Which of the following inhibits stem lengthening in
plants? a. windswept location b. repeated contact by grazing animals c. greenhouse growth d. mechanical stress e. all EXCEPT “greenhouse growth”
Piezophilic bacteria ________.
A. require high concentrations of H2S gas for growth B. grow only in environments of reduced atmospheric pressure, such as found at high elevation C. grow at pressures exceeding 100 atm D. tolerate high concentration of barium
The DNA double helix is held together by (covalent/ionic/hydrogen) bonds.
Fill in the blank(s) with the appropriate word(s).
Cells use membranes to help maintain set ranges of ion concentrations inside and outside the cell. Which of the following ions is the most abundant inside a typical mammalian cell?
(a) Na+ (b) K+ (c) Ca2+ (d) Cl–