The individual atoms of a water molecule are held together by
A) ionic bonds.
B) hydrogen bonds.
C) covalent bonds.
D) weak bonds.
C
You might also like to view...
Which of the following is/are required with actin and myosin in order to initiate muscle contraction?
A. Calcium and phosphate B. Calcium and ATP C. ATP D. Phosphate E. Calcium
This is a process in which molecules from the cell's surroundings bind to receptor molecules on the plasma membrane.
A. phagocytosis B. receptor mediated endocytosis C. osmosis D. active transport
For many enzymes, the rate of product formation increases as the concentration of the substrate increases. Eventually the rate of the reaction reaches a maximum at which further increases in the concentration of the substrate have no effect. Why?
A) At high concentrations of substrate, the activation energy of the reaction decreases. B) The enzyme is no longer specific for the substrate. C) At high concentrations of substrate, the reaction is endergonic. D) At high concentrations of substrate, all of the enzyme active sites are being occupied by substrate molecules. E) At high concentrations of substrate, the activation energy of the reaction increases.
Basic dyes are
A. repelled by cells. B. used in negative staining. C. attracted to the acidic substances of bacterial cells. D. dyes such as India ink and nigrosin. E. anionic.