Question 1

Which of the following is NOT one of the five fundamental characteristics shared by all living organisms?

Accepted Answer

Ability to photosynthesize

Question 2

According to the central dogma of molecular biology, what is the correct sequence of information flow?

Accepted Answer

$$DNA \rightarrow RNA \rightarrow Protein$$

Question 3

Which statement best describes the difference between eukaryotic and prokaryotic cells?

Accepted Answer

Eukaryotic cells contain membrane-bound organelles, while prokaryotic cells do not.

Question 4

Which of the following best explains why water is an excellent solvent for biological molecules?

Accepted Answer

Water forms hydrogen bonds with polar molecules, allowing them to dissolve.

Question 5

A carbon atom has 6 protons, 6 neutrons, and 6 electrons. What is its atomic mass?

Accepted Answer

$$12$$

Question 6

Which of the following is true about isotopes?

Accepted Answer

Isotopes have the same number of protons but different numbers of neutrons.

Question 7

Which property of water allows insects to walk on its surface?

Accepted Answer

Surface tension

Question 8

What is the role of hydrogen bonds in the structure of DNA?

Accepted Answer

They connect complementary base pairs, stabilizing the double helix.

Question 9

Which of the following best describes a molecule?

Accepted Answer

A substance containing two or more chemically bonded atoms

Question 10

Which of the following is a correct example of base pairing in DNA?

Accepted Answer

$$A$$ pairs with $$T$$

Question 11

Which of the following is a function of proteins in cells?

Accepted Answer

Forming structural components and promoting chemical reactions

Question 12

Which of the following best describes an ionic bond?

Accepted Answer

A bond formed by the transfer of electrons from one atom to another

Question 13

What is the molarity ($$M) of a $$solution containing $$0.5$$ moles of solute in $$2$$ liters of solution?

Accepted Answer

$$0.25\ M$$

Question 14

Which of the following is a real-world application of radioactive isotopes in biology?

Accepted Answer

Dating fossils using radiometric techniques

Question 15

Which of the following statements about valence electrons is correct?

Accepted Answer

Valence electrons are found in the outermost shell and are involved in chemical bonding.

Question 16

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

Accepted Answer

Covalent bonds involve sharing of electrons, while noncovalent bonds involve electrostatic interactions.

Question 17

Which of the following is an emergent property of water that is critical for life?

Accepted Answer

High heat of vaporization

Question 18

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

Accepted Answer

Ice has a lower density than liquid water due to hydrogen bonding.

Question 19

Which of the following is true about acids and bases in water?

Accepted Answer

Acids donate protons ($$H^+) $$and bases accept protons.

Question 20

Which of the following is the correct definition of an ecosystem?

Accepted Answer

All living and nonliving things in a particular area

Foundations of General Biology: Characteristics of Life, Biological Organization, and Chemistry of Life

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