Which of the following statements accurately describes the solutes within a solution?
A. Solutes are greater than 1 millimeter in size, and will settle out of solution if the mixture is left standing.
B. Solutes are between 1 nanometer and 1 millimeter in size; they do not scatter light but will settle out of solution if left standing.
C. The solutes are not visible, do not scatter light, and do not settle if the solution is left standing.
D. Water is the universal solute, and solutes are more abundant in solutions than solvents are.
Answer: C
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Two solutions are separated by a selectively permeable membrane. If solution A has a higher concentration of a nonpermeating solute than solution B, then __________.
A. the solute will pass down its concentration gradient from solution A to B B. the solute will pass down its concentration gradient from solution B to A C. water will pass down its concentration gradient from solution A to B D. water will pass down its concentration gradient from solution B to A E. neither the solute nor water will diffuse
Which of the following does NOT describe enzymes?
A) Enzymes work by raising the energy of activation. B) Some enzymes are purely protein. C) Some enzymes are protein plus a cofactor. D) Each enzyme is chemically specific.
Forensic DNA evidence can be taken from hair or bone but not blood or semen.
Answer the following statement true (T) or false (F)
The people who are predicted to succeed on the job because they passed the selection test, and who in fact turn out to be successful employee are identified as.
A. True negatives B. False positives C. False negatives D. True positives