Question 1

Which of the following best describes the scientific method as used in biology?

Accepted Answer

A cyclical process involving observation, hypothesis formation, experimentation, and revision based on results.

Question 2

A scientist is studying the effect of ocean acidification on marine life. Which step of the scientific method is she performing when she measures the pH of seawater and records the number of surviving organisms?

Accepted Answer

Making observations and collecting data

Question 3

Which of the following molecules is considered the universal solvent in biological systems, and why?

Accepted Answer

Water, because its polarity allows it to dissolve many substances.

Question 4

Which equation correctly represents the process of photosynthesis?

Accepted Answer

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

Question 5

A student observes that plant cells have a rigid structure while animal cells do not. Which cellular component is responsible for this difference?

Accepted Answer

Cell wall

Question 6

Which of the following best explains why carbon is the basis for life on Earth?

Accepted Answer

Carbon can form four covalent bonds, allowing for complex and diverse organic molecules.

Question 7

During a laboratory experiment, a student accidentally mixes an acid with a base. What is the expected result of this reaction?

Accepted Answer

The acid and base will neutralize each other, forming water and a salt.

Question 8

Which of the following is a correct statement about enzymes?

Accepted Answer

Enzymes lower the activation energy required for reactions.

Question 9

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

Accepted Answer

Insulin

Question 10

Which of the following best describes the function of the mitochondria in eukaryotic cells?

Accepted Answer

Energy production through cellular respiration

Question 11

A biologist is studying the replication of DNA. Which enzyme is primarily responsible for adding new nucleotides during DNA synthesis?

Accepted Answer

DNA polymerase

Question 12

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

Accepted Answer

Water moving into a plant root from the soil

Question 13

Which equation represents the calculation of pH in a solution?

Accepted Answer

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

Question 14

A student is asked to compare mitosis and meiosis. Which statement is correct?

Accepted Answer

Mitosis produces two identical cells, while meiosis produces four genetically unique cells.

Question 15

Which of the following best explains the importance of sexual reproduction in evolution?

Accepted Answer

It increases genetic diversity, which can enhance survival in changing environments.

Question 16

A researcher is using a microscope to observe cell division. Which phase of mitosis is characterized by the alignment of chromosomes along the center of the cell?

Accepted Answer

Metaphase

Question 17

Which of the following is a function of proteins in living organisms?

Accepted Answer

Catalyzing biochemical reactions

Question 18

A student is asked to calculate the magnification of a microscope. If the objective lens is 40x and the ocular lens is 10x, what is the total magnification?

Accepted Answer

$$40 	imes 10 = 400$$

Question 19

Which of the following best describes the role of ATP in cellular processes?

Accepted Answer

ATP provides energy for cellular work.

General Biology I (BIOL-121) Syllabus and Study Guide

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