Q: Which equation correctly represents the process of cellular respiration?

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

Question 1

Which of the following best describes the primary focus of General Biology I (BIOL 205) as taught by Samantha Arsenault, M.S. in Fall 2025?

Accepted Answer

Fundamental principles of biology including cellular structure, function, and basic biochemistry.

Question 2

A student in BIOL 205 is asked to calculate the molarity of a solution. If 0.5 moles of NaCl are dissolved in 2 liters of water, what is the molarity ($$M) of $$the solution?

Accepted Answer

$$M = \frac{0.5}{2} = 0.25 M$$

Question 3

Which of the following scenarios best illustrates the concept of homeostasis in living organisms?

Accepted Answer

A human sweating to cool down when body temperature rises.

Question 4

In a laboratory experiment, students observe osmosis by placing a cell in a hypotonic solution. What is the expected outcome for the cell?

Accepted Answer

The cell will gain water and swell.

Question 5

Which equation correctly represents the process of cellular respiration?

Accepted Answer

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

Question 6

A student is asked to identify the correct sequence of the scientific method. Which of the following is the correct order?

Accepted Answer

Observation, Hypothesis, Experiment, Analysis, Conclusion

Question 7

Which of the following best explains why enzymes are considered biological catalysts?

Accepted Answer

They speed up chemical reactions without being used up.

Question 8

A patient is diagnosed with diabetes mellitus. Which biological molecule is most directly involved in the regulation of blood glucose levels?

Accepted Answer

Insulin

Question 9

Which of the following statements about DNA is correct?

Accepted Answer

DNA is a double-stranded molecule composed of nucleotides.

Question 10

A student mixes vinegar (acetic acid) and baking soda (sodium bicarbonate) in a beaker. Which type of chemical reaction occurs?

Accepted Answer

Neutralization reaction

Question 11

Which organelle is responsible for producing ATP in eukaryotic cells?

Accepted Answer

Mitochondrion

Question 12

If a cell has a surface area of $$24 	ext{ cm}^2$$ and a volume of $$8 	ext{ cm}^3$$, what is its surface area to volume ratio?

Accepted Answer

$$\frac{24}{8} = 3$$

Question 13

Which of the following best describes the function of the plasma membrane?

Accepted Answer

It controls the movement of substances into and out of the cell.

Question 14

A mutation occurs in the gene coding for hemoglobin. Which level of protein structure is most likely to be affected first?

Accepted Answer

Primary structure

Question 15

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

Accepted Answer

Oxygen moving from the lungs into the bloodstream.

Question 16

Which of the following best explains why water is considered a universal solvent?

Accepted Answer

Water can dissolve many substances due to its polarity.

Question 17

A scientist wants to test the effect of light intensity on plant growth. Which variable should be kept constant to ensure a valid experiment?

Accepted Answer

Type of plant

Question 18

Which of the following is the correct formula for calculating the pH of a solution given the hydrogen ion concentration $$[H^+]$$?

Accepted Answer

$$pH = -\log_{10}[H^+]$$

Question 19

Which of the following is an example of a multi-step biological process involving both photosynthesis and cellular respiration?

Accepted Answer

A plant absorbs sunlight to produce glucose, which is then used by its mitochondria to generate ATP.

Question 20

Which of the following best describes the role of ribosomes in a cell?

Accepted Answer

Ribosomes synthesize proteins by translating mRNA.

General Biology I – BIOL 205: Course Introduction

Study Guide - Practice Questions

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