Question 1

Which of the following correctly lists the hierarchy of biological organization from least to most complex?

Accepted Answer

Atom, molecule, cell, tissue, organ, organism

Question 2

A scientist is studying a group of bacteria that can survive in extreme environments and have no membrane-bound organelles. Which domain do these organisms most likely belong to?

Accepted Answer

Archaea

Question 3

Which of the following statements best describes the difference between prokaryotic and eukaryotic cells?

Accepted Answer

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

Question 4

Which of the following is a correct example of a qualitative observation?

Accepted Answer

The plant leaves are green and waxy.

Question 5

If an atom has 6 protons, 6 neutrons, and 6 electrons, what is its atomic number and mass number?

Accepted Answer

Atomic number: 6, Mass number: 12

Question 6

Which of the following best explains why water has a high specific heat capacity?

Accepted Answer

Hydrogen bonds between water molecules require more energy to break.

Question 7

A solution has a $$[OH^-]$$ concentration of $$1 	imes 10$$^{-6}$$ M. What is the pH of the solution?

Accepted Answer

$$pH = 8$$

Question 8

Which of the following functional groups is most likely to act as a base and accept protons in a biological system?

Accepted Answer

Amino group ($$-NH_2$)

Question 9

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

Accepted Answer

Surface tension due to hydrogen bonding

Question 10

A buffer solution is prepared by mixing a weak acid and its conjugate base. What is the main function of this buffer in a biological system?

Accepted Answer

To maintain a stable pH when acids or bases are added

Question 11

Which of the following best describes the difference between hydrophobic and hydrophilic compounds?

Accepted Answer

Hydrophilic compounds form hydrogen bonds with water, while hydrophobic compounds do not.

Question 12

Which of the following is true about isotopes?

Accepted Answer

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

Question 13

Which of the following elements is most likely to form four covalent bonds in organic molecules?

Accepted Answer

Carbon

Question 14

A scientist wants to test the effect of a new fertilizer on plant growth. Which of the following is the best example of a dependent variable in this experiment?

Accepted Answer

Height of the plants after two weeks

Question 15

Which of the following best describes a covalent bond?

Accepted Answer

A bond formed by the sharing of electrons between atoms

Question 16

Which of the following statements about ionic bonds is correct?

Accepted Answer

Ionic bonds are formed by the transfer of electrons from one atom to another.

Question 17

Which of the following is a correct calculation for the number of molecules in 2 moles of water?

Accepted Answer

$$2 	imes 6.02 	imes 10$$^{23}$$

Question 18

Which of the following best explains why carbon is considered the backbone of organic molecules?

Accepted Answer

Carbon can form four covalent bonds, allowing for complex and diverse structures.

Question 19

A solution has a $$[H^+]$$ concentration of $$1 	imes 10$$^{-4}$$ M. What is the pH of the solution?

Accepted Answer

$$pH = 4$$

Question 20

Which of the following is a correct statement about the relationship between electron configuration and chemical properties?

Accepted Answer

The number of electrons in the outer shell determines how atoms interact and bond.

General Biology: Foundational Concepts and Chemical Principles

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