Chemicals in a solution can move down a concentration gradient. This means the chemical will move from the area of ________ concentration to the area of ________ concentration
A) low; low
B) low; high
C) high; high
D) equal; equal
E) high; low
E
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Biological catalysts ________.
A. remain unchanged at the end of the reaction B. decrease reaction rates C. alter a reaction product D. All of the choices are correct.
Which statement is true concerning the genetic code?
A)DNA is said to specify only the structure of protein. B)The chemical structure of cells is primarily determined by lipids while the physical nature of cells is determined by proteins. C)DNA serves as the master blueprint for the synthesis of carbohydrates, lipids and proteins. D)Protein synthesis plays a small but important part in the metabolic machinery of the cell
Which of the following situations could interfere with normal child birth?
A. small ischial spines B. a small pelvic outlet C. an enlarged iliac crest D. a wide, circular pelvic inlet E. widely spaced ischial spines
How do the lungs function as a part of the excretory system?
A. By removing nitrogenous wastes B. By removing salts, lactic acid, and urea C. By removing bilirubin D. By removing carbon dioxide