Practice Quiz

Praxis II: Biology Content Knowledge Exam Prep - Question List

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51. Which of the following is a correct paring of nitrogenous bases in DNA?
  1. Cytosine and uracil
  2. Adenine and guanine
  3. Thymine and cytocine
  4. Cytosine and guanine
  5. Guanine and uracil
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52. According to the heterotroph hypothesis, which of the following is FALSE?
  1. Autotrophs evolved only after a source of carbon became available.
  2. Heterotrophs fed on the organic material in the primordial soup.
  3. Anaerobic autotrophs evolved before aerobic autotrophs.
  4. The dominant species on Earth today descended directly from the anaerobic autotrophs and heterotrophs.
  5. Photosynthesis was critical to the development of autotrophs.
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53. The region of the enzyme that interacts with the substrate is called the:
  1. Binding site
  2. Regulatory site
  3. Active site
  4. Substrate site
  5. Chemical site
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54. Which of the following statements about coenzymes is FALSE?
  1. Coenzymes are non-protein compounds.
  2. Some enzymes require more than one coenzyme.
  3. Coenzymes can bind to the active site on an enzyme.
  4. Coenzymes reduce the speed of enzymatic reactions.
  5. Coenzymes can be organic or inorganic.
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55. Which of the following can function as an inorganic coenzyme?

I. Iron
II. Magnesium
III. Zinc
  1. I only
  2. II only
  3. III only
  4. I and II only
  5. I, II, and III only
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