QUESTION 1 Sodium fluoride (NaF) is a O a. cell nutrient O b. cellular poison O c. type of yeast O d. sugar

Question 19 The best description of a prokaryote is that it is O a. typically a unicellular organism between 1 and 10 micrometers in size. O b. most commonly a eukaryotic organism between 1 and 10 micrometers in size. O c. generally found living and reproducing in isolation in inhospitable environments. O d. a set of unicellular organisms found living and growing in a common environment. O e. a unicellular organism between 1 and 2 millimeters in size.

QUESTION 19 Which enzyme (Enzyme 1, circle; Enzyme 2 square) has the worst affinity for the substrate? 5.0 4.0 EnzGraph 3.0 8 2.0 1.0 0.0 10 15 20 25 30 35 40 45 50 substrate (mM) Enz1 Enz2 A. Enzyme 1 (circles) B. Enzyme 2 (squares) C. cannot tell with information given D. both have the same affinity

Question 42 Carnivorous plants often live in acidic soils where O a. phosphorus O b. sulfur O c. molybdenum O d. nitrogen O e. potassium -fixing bacteria are unable to survive.