Question 1

Which of the following best describes why energy flows through an ecosystem and is not recycled?

Accepted Answer

Energy is converted to heat and lost to the environment at each trophic level.

Question 2

A scientist observes that a certain plant grows faster when exposed to blue light. She proposes, 'Blue light increases the rate of photosynthesis in this plant.' Which aspect of the scientific method does this statement represent?

Accepted Answer

Hypothesis

Question 3

Which of the following scenarios best illustrates the concept of homeostasis?

Accepted Answer

A person sweats to cool down after running on a hot day.

Question 4

Which sequence correctly lists the levels of biological organization from least inclusive to most inclusive?

Accepted Answer

Molecule → Organelle → Cell → Tissue → Organ → Organ System → Organism → Population → Community → Ecosystem

Question 5

Which of the following statements about evolution and natural selection is correct?

Accepted Answer

Populations evolve over generations, not individuals.

Question 6

A radioactive isotope of carbon has 6 protons and 8 neutrons. What is its atomic mass?

Accepted Answer

$$14$$

Question 7

Which of the following best explains why water is a polar molecule?

Accepted Answer

Oxygen attracts electrons more strongly than hydrogen, creating partial charges.

Question 8

Which of the following statements about acids, bases, and buffers is true?

Accepted Answer

Buffers help maintain homeostasis by resisting changes in pH.

Question 9

A molecule with the formula $$C_{55}H$$_{90}$$O_{45}$ is most likely a:

Accepted Answer

Polysaccharide

Question 10

Which of the following statements about dehydration reactions is FALSE?

Accepted Answer

Animal digestive systems utilize this process to break down food.

Question 11

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

Accepted Answer

They perform cellular respiration to produce ATP.

Question 12

Which of the following cell structures is responsible for breaking down harmful substances such as hydrogen peroxide?

Accepted Answer

Peroxisomes

Question 13

A cell is placed in a solution and neither gains nor loses water. The solution is:

Accepted Answer

Isotonic to the cell

Question 14

Facilitated diffusion across a biological membrane requires ________ and moves a substance ________ its concentration gradient.

Accepted Answer

Transport proteins; down

Question 15

Which process can move a solute against its concentration gradient?

Accepted Answer

Active transport

Question 16

Which part of the ATP molecule is released when energy is needed for cellular work?

Accepted Answer

The terminal phosphate group

Question 17

During cellular respiration, which molecule acts as the final electron acceptor in the electron transport chain?

Accepted Answer

Oxygen ($$O_2)$$

Question 18

Which of the following best explains why yeast produce alcohol only in the absence of oxygen?

Accepted Answer

Alcohol fermentation occurs only under anaerobic conditions.

Question 19

Which of the following is a function of the cytoskeleton in eukaryotic cells?

Accepted Answer

Maintaining cell shape and enabling movement of organelles

Question 20

Which of the following statements about enzymes is FALSE?

Accepted Answer

They are monomers used to build proteins.

BIOL 1001: Foundations of Biology – Study Guide (Chapters 1–6)

Study Guide - Practice Questions

Study Guide - Flashcards