Refer to the metabolic pathway illustrated above. If A, B, and C are all required for growth, a strain mutant for the gene-encoding enzyme B would be able to grow on medium supplemented with _____
A) nutrient A only
B) nutrient B only
C) nutrient C only
D) nutrients A and C
Answer: C
You might also like to view...
Suppose a cell's membrane is permeable to water, but not to Na+ or Cl? or any other solute. The NaCl concentration is
higher outside the cell than inside the cell, and the osmolarity of the cell is higher than that of the solution surrounding the cell. What will occur?
a. Overall, the cell will lose water. b. Overall, the cell will take up water, Na+, and Cl?. c. Overall, the cell will take up water. d. Overall, the cell will take up water and lose Na+ and Cl?. e. Overall, the cell will lose water and take up Na+ and Cl?.
Active transport is characterized by:
What will be an ideal response?
The yield from each pyruvate in the second stage
includes a. 4 NADH. b. 1 FADH2. c. 1 ATP. d. 3 CO2. e. all of these.
Membrane-bounded organelles facilitate faster chemical reactions because:a
reactants are within close proximity to each other. b. membranes lower the activation energy of biochemical reactions. c. membrane-bounded organelles act as catalysts for biochemical reactions. d. reactants move faster within membrane-bounded organelles. e. reactants are less likely to encounter each other within membrane-bounded organelles.