Question 1

A student measures the mass of a sample as 2.5 kg. What is this mass in grams ($$g$$)?

Accepted Answer

$$2.5 	imes 10^3$ g

Question 2

Which of the following is the correct formula for calculating the density ($$D) of an $$object?

Accepted Answer

$$D = \frac{M}{V}$$

Question 3

A scientist hypothesizes that increasing sunlight will increase plant growth. In an experiment, which is the independent variable?

Accepted Answer

Amount of sunlight

Question 4

Given the following structural formula, which functional group is present: $$-COOH$$?

Accepted Answer

Carboxyl group

Question 5

A molecular model shows a long hydrocarbon chain with only single bonds between carbons and three fatty acid tails. What type of molecule is this?

Accepted Answer

Saturated triglyceride

Question 6

If you are using a compound microscope with a 10x ocular lens and a 40x objective lens, what is the total magnification?

Accepted Answer

$$400	imes$$

Question 7

A specimen measures 8 ocular divisions under a microscope. If each division equals $$0.05 mm$$, what is the actual size of the specimen?

Accepted Answer

$$0.4 mm$$

Question 8

Which part of the microscope is primarily used to adjust the focus when using the high-power (40x) objective?

Accepted Answer

Fine adjustment knob

Question 9

A dialysis tube filled with 10% sucrose solution is placed in a beaker containing 20% sucrose solution. Which term best describes the solution in the beaker relative to the tube, and what will be the net movement of water?

Accepted Answer

Beaker is hypertonic; water moves out of the tube

Question 10

Which metric prefix represents $$10^{-3}$$?

Accepted Answer

milli-

Question 11

A student wants to graph the effect of temperature (°C) on enzyme activity (rate of reaction). Which variable should be placed on the $$x-$$axis?

Accepted Answer

Temperature

Question 12

Which of the following best describes a control group in an experiment?

Accepted Answer

The group that is not exposed to the independent variable

Question 13

A molecule has the formula $$C_6H_{12}O_6$. What type of molecule is this?

Accepted Answer

Glucose

Question 14

Which of the following statements about diffusion is correct?

Accepted Answer

Diffusion is the movement of molecules from high to low concentration

Question 15

A dialysis tube containing 0.5 M NaCl is placed in a beaker with 0.5 M NaCl. What will happen to the mass of the tube over time?

Accepted Answer

It will stay the same

Question 16

Which of the following is the correct sequence for the steps of the scientific method?

Accepted Answer

Observation, hypothesis, experiment, conclusion

Question 17

A student observes that a solution is hypertonic to a cell. What will happen to the cell?

Accepted Answer

The cell will lose water and shrink

Question 18

Which of the following best describes the relationship between molecular mass and rate of diffusion?

Accepted Answer

As molecular mass increases, rate of diffusion decreases

Question 19

A graph shows the percent change in weight of dialysis tubes over time. What does a negative percent change indicate?

Accepted Answer

The tube lost water

Question 20

Which of the following is NOT a rule for creating scientific graphs?

Accepted Answer

Leave axes unlabeled for clarity

General Biology Lab Study Guide: Measurement, Scientific Method, Molecules, Microscopy, and Osmosis

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