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Review Biology related questions and content

Which of the following is the best example of a hypothesis?

  • A. Dogs like treats
  • B. Red is the best color
  • C. If I eat 100 donuts, then I will feel sick
  • D. If a plant is exposed to red light, then it will show less growth than natural light.
Correct Answer: D

Rationale: A hypothesis is a testable statement that predicts the outcome of an experiment based on observations or research. Option D is the best example of a hypothesis as it presents a clear cause-and-effect relationship that can be tested through an experiment. Options A, B, and C do not provide a clear prediction or testable statement, making them weaker examples of hypotheses. In contrast, option D clearly states the expected outcome of exposing a plant to red light, allowing for a specific experiment to test this hypothesis.

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Which antioxidant is identified as a healing vitamin?

  • A. A
  • B. D.
  • C. K
  • D. E
Correct Answer: D

Rationale:

A hypertonic solution has what concentration of solutes compared to the cell?

  • A. Same.
  • B. Negative.
  • C. Lower.
  • D. Higher.
Correct Answer: D

Rationale:

Which cellular appendage enables cells to move through their environments?

  • A. Flagellum
  • B. Cell membrane
  • C. Transport protein
  • D. Receptor
Correct Answer: A

Rationale: "Flagellum" is a whip-like appendage that allows certain cells to move through their environment.

Do enzymes catalyze reactions?

  • A. Catalyze
  • B. Inhibit
  • C. Stop
  • D. None of the above
Correct Answer: A

Rationale: Enzymes function as biological catalysts, which means they speed up chemical reactions without being consumed in the process. The correct term that describes what enzymes do to reactions is 'catalyze.' Enzymes do not inhibit or stop reactions; instead, they facilitate and accelerate them by lowering the activation energy required for the reaction to occur.

What type of bond bonds one molecule of water with another molecule of water?

  • A. Ionic
  • B. Covalent
  • C. Hydrogen
  • D. Molecular
Correct Answer: C

Rationale: Two molecules of water are bonded through hydrogen bonding. This type of bond forms between the slightly positive hydrogen atom in one water molecule and the slightly negative oxygen atom in another water molecule. Hydrogen bonds are weaker than covalent bonds but are essential in various biological processes and properties of water, contributing to its unique characteristics like high surface tension, cohesion, and adhesion.

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