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Practice Test (Survey of Natural Sciences) Flashcards

7 cards from real DAT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. Which macromolecule serves as the primary structural component of cell membranes?

    Answer: Phospholipids

    Phospholipids form the bilayer that makes up cell membranes.

  2. What is the product when an acid reacts with a base?

    Answer: Salt and water

    Neutralization reactions produce a salt and water.

  3. Which part of the neuron receives signals from other neurons?

    Answer: Dendrites

    Dendrites receive incoming signals and conduct them toward the cell body.

  4. How many electrons can the second principal energy level (n=2) hold?

    Answer: 8

    The n=2 level has s and p subshells holding a maximum of 8 electrons.

  5. Which type of selection favors extreme phenotypes at both ends of a trait range?

    Answer: Disruptive selection

    Disruptive selection favors both extremes over intermediate phenotypes.

  6. What is the conjugate base of water (H2O)?

    Answer: Hydroxide (OH-)

    Removing a proton from water yields the hydroxide ion.

  7. Which cellular process produces two genetically identical diploid daughter cells?

    Answer: Mitosis

    Mitosis yields two identical diploid daughter cells.