Which grouping of elements is found in carbohydrates?
A. N - S - O
B. Ca - H - O
C. C - H - P
D. C - H - O
E. H - O - Cl
Answer: D
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This curve most likely represents a graph of enzyme activity
a. as a function of temperature. b. as a function of pH in a strongly acidic environment. c. as a function of pH in a strongly basic environment. d. as a function of pH in a fairly neutral environment. e. as a function of temperature and pH combined.
In DNA replication, which type of molecule is a primer?
a. nucleic acid b. lipid c. protein d. carbohydrate e. inorganic
A stream’s average flow volume is affected by
a. rainfall. b. snowmelt. c. geography. d. shadows cast by plants. e. all of these.
Which of the following is a distinctive component of the cell wall of gram-negative bacteria?
A. Capsule B. Lipopolysaccharide C. Peptidoglycan D. Cytoplasmic membrane