Question 1

Which of the following is NOT one of the five unifying themes of biology as described in the course materials?

Accepted Answer

Photosynthesis

Question 2

A scientist is studying the effect of increased CO$$_2$$ concentration on ocean acidity. Which property of water is most directly involved in this process?

Accepted Answer

Versatility as a solvent

Question 3

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

Accepted Answer

Ice is less dense than liquid water because hydrogen bonds keep water molecules further apart.

Question 4

Which of the following is a trace element essential for human life?

Accepted Answer

Iron

Question 5

A biologist observes a salamander in a forest ecosystem. Which level of biological organization does this observation represent?

Accepted Answer

Organism

Question 6

Which of the following statements about DNA is correct?

Accepted Answer

DNA contains genes that are units of inheritance.

Question 7

Which equation correctly represents the process of dehydration synthesis in the formation of a polymer?

Accepted Answer

$$monomer_1$$ + $$monomer_2$$ \rightarrow polymer + H_2O$$

Question 8

Which property of water allows plants to transport water from roots to leaves against gravity?

Accepted Answer

Cohesion and adhesion

Question 9

Which of the following is an example of a real-world application of buffers in biology?

Accepted Answer

Maintaining the internal pH of human blood close to pH 7

Question 10

Which of the following best describes the relationship between energy and matter in an ecosystem?

Accepted Answer

Energy flows through the ecosystem, and matter is recycled.

Question 11

Which of the following is a correct statement about gene expression?

Accepted Answer

Gene expression is the process of converting information from DNA to RNA to protein.

Question 12

Which of the following is NOT a property of life?

Accepted Answer

Photosynthesis

Question 13

Which of the following best describes the difference between covalent and ionic bonds?

Accepted Answer

Covalent bonds involve the sharing of electrons, while ionic bonds involve the transfer of electrons.

Question 14

Which domain of life includes organisms with cells that have a nucleus?

Accepted Answer

Domain Eukarya

Question 15

A student is asked to classify a squirrel based on its coat coloration and genetic information. Which unifying theme of biology is most relevant to this task?

Accepted Answer

Evolution

Question 16

Which of the following is a correct example of a hydrophobic substance?

Accepted Answer

Oil

Question 17

Which equation represents the dissociation of water into ions?

Accepted Answer

$$H_2O \rightarrow H^+ + OH^-$$

Question 18

Which of the following is a real-life consequence of water’s high specific heat?

Accepted Answer

Coastal areas experience smaller temperature fluctuations compared to inland areas.

Question 19

Which of the following best describes the role of taxonomy in biology?

Accepted Answer

Taxonomy is the branch of biology that names and classifies species into groups of increasing breadth.

Question 20

Which of the following is a correct statement about macromolecules?

Accepted Answer

Macromolecules are polymers built from monomers.

Chapter 1-6

Study Guide - Practice Questions

Study Guide - Flashcards