Question 1

Which of the following best describes why water is considered a 'universal solvent'?

Accepted Answer

Water's polar nature allows it to dissolve many ionic and polar substances.

Question 2

A scientist observes that a plant bends toward sunlight. Which characteristic of living things does this best illustrate?

Accepted Answer

Response to Environment

Question 3

Which of the following is a correct statement about the relationship between atomic number and the structure of an atom?

Accepted Answer

The atomic number equals the number of protons in the atom.

Question 4

Which of the following best explains why saturated fats are solid at room temperature while unsaturated fats are liquid?

Accepted Answer

Saturated fats have no double bonds, allowing them to pack tightly together.

Question 5

A molecule of water (H$$_2O) is $$held together by which type of bond?

Accepted Answer

Covalent bond

Question 6

Which of the following is an example of a hypothesis based on inductive reasoning?

Accepted Answer

Every swan I have seen is white; therefore, all swans are probably white.

Question 7

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

Accepted Answer

Polar bonds share electrons unequally, creating partial charges; nonpolar bonds share electrons equally.

Question 8

Which of the following is NOT one of the 8 characteristics of living things?

Accepted Answer

Ability to move

Question 9

A solution has a pH of 4. How many times more acidic is it than a solution with a pH of 7?

Accepted Answer

$$1000$$

Question 10

Which of the following best describes the role of DNA in living organisms?

Accepted Answer

DNA acts as a blueprint for building and running an organism.

Question 11

Which of the following is a correct pairing of macromolecule and its monomer?

Accepted Answer

Carbohydrate – Monosaccharide

Question 12

Which property of water allows it to move up a plant stem against gravity (capillary action)?

Accepted Answer

Cohesion and adhesion

Question 13

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

Accepted Answer

Ice is less dense than liquid water due to hydrogen bonding.

Question 14

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

Accepted Answer

Enzyme catalysis

Question 15

Which of the following statements about the scientific method is correct?

Accepted Answer

A hypothesis must be testable and falsifiable.

Question 16

Which of the following best describes the difference between a control group and a test (experimental) group in an experiment?

Accepted Answer

The control group is kept under normal conditions for comparison.

Question 17

Which of the following is a correct statement about valence electrons?

Accepted Answer

Valence electrons determine how atoms bond with other atoms.

Question 18

Which of the following is a property of hydrophobic substances?

Accepted Answer

They repel water and do not mix with it.

Question 19

Which of the following best describes the process of dehydration synthesis?

Accepted Answer

A water molecule is removed to join two monomers together.

Question 20

Which of the following is a correct statement about evolution by natural selection?

Accepted Answer

Natural selection favors individuals with traits best suited for survival in their environment.

General Biology: Foundations, Chemistry of Life, and Biological Macromolecules

Study Guide - Practice Questions