Cell Theory

1. Which of the following best illustrates the nature of science by differentiating between a scientific hypothesis, theory, and law?

• Conducting an experiment to test a hypothesis
• Observing a natural phenomenon without any hypothesis
• Describing a scientific law without any experimental evidence
• Developing a scientific theory based on personal opinions

2. Which cellular process requires the highest amount of energy?

• Osmosis
• Diffusion
• Facilitated diffusion
• Active transport

3. How do the cell's surroundings impact the direction of cell transport?

• They have no effect on cell transport.
• They determine the speed of cell transport.
• They dictate the type of substances transported.
• They influence the movement of substances into or out of the cell.

4. A student is investigating the effect of concentration on the rate of diffusion across a semipermeable membrane. Which of the following is essential for ensuring accurate data collection and analysis?

• Using different-sized membranes
• Collecting data from only one trial
• Implementing proper sampling techniques
• Analyzing data without a control group

5. Which of the following represents a limitation of using models to explain cell transport?

• Models cannot accurately represent the movement of substances.
• Models cannot be used to simulate active transport.
• Models cannot account for the role of concentration in diffusion.
• Models cannot evaluate the composition of the cell membrane.

6. How does the composition of the cell membrane contribute to cell function?

• It provides structural support to the cell.
• It determines the direction of osmosis.
• It regulates the entry and exit of substances.
• It generates energy for active transport.

7. Which type of cell transport requires the assistance of specific transport proteins?

• Osmosis
• Diffusion
• Facilitated diffusion
• Active transport

8. A scientist proposes a possible explanation for an observed phenomenon. This proposed explanation is referred to as a:

• Hypothesis
• Theory
• Law
• Conclusion

9. A student wants to investigate how different concentrations of a solute affect the rate of diffusion across a membrane. Which of the following sampling techniques should the student employ?

• Using a single measurement for each concentration
• Taking multiple measurements at a single concentration
• Randomly selecting samples from different concentrations
• Using only one concentration for the entire investigation

10. Which process describes the movement of water across a semipermeable membrane?

• Osmosis
• Diffusion
• Facilitated diffusion
• Active transport