$$\text{Total Magnification} = \text{Eyepiece Magnification} \times \text{Objective Magnification}$$

Question 1

A scientist needs to prepare 250 mL of a solution. How many liters is this equivalent to?

Accepted Answer

$$0.25$$ liters = 250 \div 1000 = 0.25$ liters

Question 2

Which of the following statements best describes a solution with a pH of 4?

Accepted Answer

It has a high concentration of hydrogen ions and is acidic.

Question 3

Which of the following is the correct order of steps in the scientific method?

Accepted Answer

Observation, Hypothesis, Experiment, Data Collection, Conclusion

Question 4

A student observes that a plant cell shrinks after adding a salt solution. What is the most likely explanation for this observation?

Accepted Answer

The salt solution caused water to move out of the cell by osmosis.

Question 5

Which of the following is NOT a correct practice when using a microscope?

Accepted Answer

Using regular tissue paper to clean the eyepiece.

Question 6

Which of the following best describes the difference between prokaryotic and eukaryotic cells?

Accepted Answer

Eukaryotic cells have membrane-bound organelles, prokaryotic cells do not.

Question 7

A hypothesis states: 'If enzyme X is boiled, then its activity will decrease.' What is the null hypothesis for this experiment?

Accepted Answer

Boiling enzyme X will have no effect on its activity.

Question 8

Which of the following best explains why enzymes are specific to their substrates?

Accepted Answer

The active site of an enzyme has a unique shape that fits only specific substrates.

Question 9

If an experiment yields a p-value of $$0.03$$, and the cutoff is $$0.05$$, what should you conclude?

Accepted Answer

Reject the null hypothesis.

Question 10

Which of the following is the correct formula for calculating total magnification on a compound microscope?

Accepted Answer

$$	ext{Total Magnification} = 	ext{Eyepiece Magnification} 	imes 	ext{Objective Magnification}$$

Question 11

Which of the following best describes the effect of boiling on most enzymes?

Accepted Answer

Boiling denatures enzymes, reducing or eliminating their activity.

Question 12

Which of the following statements about the metric system is correct?

Accepted Answer

The prefix 'milli-' means $$10^{-3}.$$

Question 13

When preparing a wet mount slide, what is the correct way to add a chemical under the coverslip?

Accepted Answer

Add the chemical to the edge of the coverslip and draw it under using a paper towel.

Question 14

Which of the following cell types contains a cell wall?

Accepted Answer

Plant cells

Question 15

In an enzyme experiment, which of the following is considered the substrate?

Accepted Answer

The molecule that the enzyme acts upon

Question 16

A student wants to test the effect of pH on enzyme activity. Which of the following is the independent variable?

Accepted Answer

The pH of the solution

Question 17

What is the main function of iodine when preparing potato and banana wet mounts?

Accepted Answer

To stain starch granules for better visibility

Question 18

Which of the following best describes a neutral solution on the pH scale?

Accepted Answer

A solution with a pH of 7

Question 19

Which of the following is a dependent variable in an experiment testing the effect of temperature on enzyme activity?

Accepted Answer

The rate of product formation

Question 20

Which of the following is the correct way to store a microscope after use?

Accepted Answer

Lower the stage, set the objective lens to the lowest power, and cover the microscope.

General Biology Lab Study Guide: Metric System, pH, Microscopes, Cells, Scientific Method, and Enzymes

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