Practice Quiz

MCAS Biology Practice - Question List

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131. Many land plants store energy in starch. When energy is needed, the starch molecules can be broken down quickly. This chemical reaction produces which of the following?
  1. amino acids
  2. lipids
  3. monosaccharides
  4. RNA chains
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132. Which of the following best describes the formation of a zygote?
  1. A sperm cell nucleus and an egg cell nucleus fuse.
  2. A cell’s DNA replication and mitosis are accelerated.
  3. A succession of cell divisions produces a solid mass of cells.
  4. A cell with 46 chromosomes divides to form cells with 23 chromosomes each.
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133. Which of the following functions does active transport perform in a cell?
  1. packaging proteins for export from the cell
  2. distributing enzymes throughout the cytoplasm
  3. moving substances against a concentration gradient
  4. equalizing the concentration of water inside and outside the cell
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134. European rabbits were introduced to Australia in 1859. The rabbits reproduced rapidly in their new habitat, displaced other animals, and overgrazed vegetation. In an attempt to reduce the rabbit population, a virus was introduced in 1951. This virus is usually deadly to European rabbits.When the virus was first introduced, the rabbits died in large numbers, but the death rate decreased over time. Which of the following best explains the decrease in the rabbit death rate?
  1. Young rabbits learned to avoid being infected with this virus.
  2. Natural selection favored rabbits that are resistant to this virus.
  3. The lifespan of this virus is too short to affect rabbits over a long period of time.
  4. The rabbits that were originally infected with this virus have been dead for many years.
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135. Which of the following is a main function of the cell wall?
  1. to store carbohydrates for later use
  2. to give the cell a rigid structure
  3. to package proteins for export
  4. to carry out photosynthesis
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