Question 1

Which of the following best describes the unifying principle of biology that explains the diversity of life on Earth?

Accepted Answer

Evolution by natural selection

Question 2

Which property of water is most crucial for its role as a universal solvent in biological systems?

Accepted Answer

Its polarity

Question 3

A scientist wants to test the effect of a new fertilizer on plant growth. Which step of the scientific method is she performing when she measures the height of plants after applying the fertilizer?

Accepted Answer

Collecting data

Question 4

Which of the following equations correctly represents the process of cellular respiration?

Accepted Answer

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

Question 5

Which of the following best explains why prokaryotic cells are considered crucial to the biosphere?

Accepted Answer

They recycle nutrients and are involved in processes such as nitrogen fixation.

Question 6

Which of the following statements about the relationship between atoms, ions, and molecules is correct?

Accepted Answer

Molecules are formed when two or more atoms bond together, and ions are atoms that have gained or lost electrons.

Question 7

Which of the following is a real-world example of the impact of scientific discoveries on society?

Accepted Answer

The discovery of antibiotics leading to the treatment of bacterial infections

Question 8

Which of the following best describes the role of enzymes in biological systems?

Accepted Answer

Enzymes lower the activation energy required for reactions to occur.

Question 9

A student is examining a cell under a microscope and observes that it lacks a nucleus but has a cell wall. Which type of cell is the student most likely observing?

Accepted Answer

A prokaryotic bacterial cell

Question 10

Which of the following best describes the process of diffusion across a cell membrane?

Accepted Answer

Movement of molecules from high to low concentration without energy input

Question 11

Which of the following is a correct application of Mendel’s law of independent assortment?

Accepted Answer

Alleles for different traits are distributed to gametes independently of one another.

Question 12

Which of the following best explains why water is essential for life?

Accepted Answer

Water’s polarity allows it to dissolve many substances, facilitating chemical reactions.

Question 13

Which of the following is a real-life application of gene regulation in biotechnology?

Accepted Answer

Producing insulin in genetically modified bacteria

Question 14

Which of the following equations represents the process of photosynthesis?

Accepted Answer

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

Question 15

A patient is diagnosed with a genetic disorder caused by a mutation in a single gene. Which of the following best describes how this mutation can affect the patient?

Accepted Answer

The mutation can alter the structure and function of the protein encoded by the gene.

Question 16

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

Accepted Answer

Eukaryotic cells have a nucleus; prokaryotic cells do not.

Question 17

Which of the following is an example of applying the scientific method to a real-world problem?

Accepted Answer

Designing an experiment to test the effectiveness of a new drug

Question 18

Which of the following best explains why plagiarism is considered academic misconduct?

Accepted Answer

It involves using someone else’s work without proper credit.

Question 19

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

Accepted Answer

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

Question 20

Which of the following is a correct statement about the role of critical thinking in biology?

Accepted Answer

Critical thinking helps scientists analyze data and draw valid conclusions.

General Biology I (BIO 121) Syllabus and Course Structure

Study Guide - Practice Questions

Study Guide - Flashcards