Practice Quiz

MCAS Biology Practice - Question List

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166. Why is the particular sequence of bases in a segment of DNA important to cells?
  1. Some base sequences code for protein production.
  2. Some base sequences cause the release of lipids from the nucleus.
  3. Some base sequences contain the order of sugars in polysaccharides.
  4. Some base sequences produce electrical signals sent to the cytoplasm.
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167. A single prokaryotic cell can divide several times in an hour. Few eukaryotic cells can divide as quickly. Which of the following statements best explains this difference?
  1. Eukaryotic cells are smaller than prokaryotic cells.
  2. Eukaryotic cells have less DNA than prokaryotic cells.
  3. Eukaryotic cells have more cell walls than prokaryotic cells.
  4. Eukaryotic cells are more structurally complex than prokaryotic cells.
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168. Which of the following is a central role of carbon in the chemistry of living organisms?
  1. Carbon can only bond with other carbon atoms.
  2. Carbon is a solvent that breaks chemical bonds.
  3. Carbon readily forms ionic bonds that separate easily.
  4. Carbon can form many types of molecules with covalent bonds.
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169. Human tears contain the enzyme lysozyme, which damages the cell walls of bacteria. Which of the following statements about lysozyme is most accurate?
  1. Lysozyme causes mutations in bacterial cell wall molecules.
  2. Lysozyme is destroyed as it digests bacterial cell wall molecules.
  3. Lysozyme breaks a specific type of bond in a bacterial cell wall molecule.
  4. Lysozyme is converted to another chemical by a bacterial cell wall molecule.
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170. Fertilizers can enable farmers to grow the same crop in a field for several years in a row. Farmers who use less fertilizer often rotate their crops by planting the crop one year and legumes, such as beans and clover, the following year. Fertilizer use and crop rotation with legumes both increase the availability of which of the following nutrients in soil?
  1. calcium
  2. nitrogen
  3. oxygen
  4. protein
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