Question 1

Which of the following best describes an emergent property in biological systems?

Accepted Answer

A property that arises from the arrangement and interactions of parts as complexity increases.

Question 2

A scientist is testing the effect of temperature on caterpillar growth. In this experiment, what is the independent variable?

Accepted Answer

The temperature at which the caterpillars are kept.

Question 3

Which of the following statements about scientific hypotheses is correct?

Accepted Answer

A hypothesis must generate predictions that can be tested by experiments or further observations.

Question 4

In an experiment, the control group is characterized by which of the following?

Accepted Answer

It differs from the experimental group in only the one variable the experiment is designed to test.

Question 5

Which of the following is the correct hierarchy of biological organization from smallest to largest?

Accepted Answer

Molecule, organelle, cell, tissue, organ, organ system, organism, population, community, ecosystem, biosphere

Question 6

A patient is lactose intolerant. Which enzyme are they most likely lacking, and what is the consequence?

Accepted Answer

Lactase; they cannot break down lactose into glucose and galactose.

Question 7

Which macromolecule group does dietary fiber belong to, and why can't humans digest it?

Accepted Answer

Carbohydrates; humans lack the enzyme to break the β-glycosidic bonds in cellulose.

Question 8

Which of the following best explains why phospholipids are effective at transporting fats in the bloodstream?

Accepted Answer

Phospholipids have both hydrophilic and hydrophobic regions, allowing them to form micelles that can surround and transport hydrophobic fat molecules in aqueous environments.

Question 9

Which of the following is a correct statement about the structure of proteins?

Accepted Answer

The tertiary structure is stabilized by interactions between side chains of amino acids that may be far apart in the primary sequence.

Question 10

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

Accepted Answer

Enzymes lower the activation energy required for a reaction, increasing the reaction rate.

Question 11

A red blood cell is placed in a hypotonic solution. What will happen to the cell, and why?

Accepted Answer

Water will enter the cell by osmosis, causing it to swell and possibly burst.

Question 12

Which of the following best distinguishes passive transport from active transport across cell membranes?

Accepted Answer

Passive transport moves substances down their concentration gradient without energy input, while active transport moves substances against their gradient and requires ATP.

Question 13

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

Accepted Answer

Glucose entering a cell through a specific transport protein down its concentration gradient.

Question 14

Which of the following best explains why field experiments are necessary to study the effects of climate change on caterpillar development?

Accepted Answer

Field experiments account for natural variables such as daily temperature fluctuations, plant nutrition, and predator interactions that are not present in controlled lab settings.

Question 15

Which of the following is true about the scientific theory compared to a hypothesis?

Accepted Answer

A theory is broader in scope and supported by a large, usually growing body of evidence.

Question 16

Which of the following best describes the function of coenzymes in enzymatic reactions?

Accepted Answer

Coenzymes are organic molecules that assist enzymes by transferring chemical groups or electrons during the reaction.

Question 17

A patient is admitted to the hospital after drinking excessive amounts of water. Which organ is most likely to be affected, and what is the primary risk?

Accepted Answer

The brain; risk of swelling due to water moving into brain cells (cerebral edema).

Question 18

Which of the following best explains why humans can digest starch and glycogen but not cellulose?

Accepted Answer

Humans lack the enzyme to break the β-1,4-glycosidic bonds in cellulose, but have enzymes for the α-1,4-glycosidic bonds in starch and glycogen.

Question 19

Which of the following is a correct example of the flow of information in biological systems?

Accepted Answer

A gene in DNA is transcribed into RNA, which is then translated into a protein.

Foundations of Life and the Scientific Process: Organization, Hypotheses, and Experimental Design

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