Q: Which equation correctly represents cellular respiration?

$$\mathrm{C_6H_{12}O_6$} + 6\mathrm{O_2$} \rightarrow 6\mathrm{CO_2$} + 6\mathrm{H_2O} + \text{energy}$$

Question 1

Which property of water allows insects like water striders to walk on its surface without sinking?

Accepted Answer

Surface tension due to hydrogen bonding

Question 2

A scientist wants to test the effect of light intensity on the rate of photosynthesis in plants. Which of the following is the independent variable in this experiment?

Accepted Answer

Light intensity

Question 3

Which of the following best describes the polarity of water molecules?

Accepted Answer

Water is polar because oxygen attracts electrons more strongly than hydrogen.

Question 4

Which of the following is NOT a characteristic of living organisms?

Accepted Answer

Ability to photosynthesize

Question 5

In a controlled experiment, why is it important to keep all variables except the independent variable constant?

Accepted Answer

To isolate the effect of the independent variable on the results

Question 6

Which equation correctly represents cellular respiration?

Accepted Answer

$$\mathrm{C_6H_{12}O_6$} + 6\mathrm{O_2$} ightarrow 6\mathrm{CO_2$} + 6\mathrm{H_2O} + 	ext{energy}$$

Question 7

Which of the following best explains why ice floats on water?

Accepted Answer

Hydrogen bonds in ice create an open lattice structure, making it less dense than liquid water.

Question 8

A student observes that plants in a shaded area grow taller than those in direct sunlight. Which step of the scientific method does this observation represent?

Accepted Answer

Making an observation

Question 9

Which of the following is an example of adhesion in water?

Accepted Answer

Water climbing up a paper towel

Question 10

Which statement best describes a scientific theory?

Accepted Answer

A well-supported explanation based on evidence and repeated testing

Question 11

Which of the following is a dependent variable in an experiment measuring the effect of fertilizer on plant growth?

Accepted Answer

Height of the plants

Question 12

Which property of water is most important for transporting nutrients and waste in living organisms?

Accepted Answer

Water's ability to act as a universal solvent

Question 13

A researcher wants to test whether a new drug affects heart rate. What is the best way to design the experiment?

Accepted Answer

Give the drug to one group and a placebo to another, then compare heart rates

Question 14

Which of the following best illustrates cohesion in water?

Accepted Answer

Water droplets forming beads on a leaf

Question 15

Which of the following is NOT a step in the scientific method?

Accepted Answer

Ignoring data that does not fit the hypothesis

Question 16

Which of the following best explains why water has a high surface tension?

Accepted Answer

Hydrogen bonds between water molecules create a strong cohesive force.

Question 17

A biologist is studying a community of organisms in a pond. Which level of biological organization is she focusing on?

Accepted Answer

Community

Question 18

Which of the following is a real-world example of homeostasis?

Accepted Answer

A human sweating to cool down when overheated

Question 19

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

Accepted Answer

Observation, hypothesis, experiment, conclusion

Question 20

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

Accepted Answer

It is used to compare results and determine the effect of the independent variable.

Foundations of General Biology: Scientific Method, Water Properties, and Biological Organization

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