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

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

Accepted Answer

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

Question 3

Which kingdom contains organisms that are multicellular, autotrophic, and have cell walls made of cellulose?

Accepted Answer

Plantae

Question 4

A scientist wants to test the effect of light intensity on plant growth. Which of the following is the best example of a controlled group in this experiment?

Accepted Answer

Plants kept in complete darkness

Question 5

Which of the following is a qualitative observation?

Accepted Answer

The solution turned blue after adding the reagent.

Question 6

How many electrons are present in the third shell of a sodium atom ($$\mathrm{Na}$$, atomic number 11)?

Accepted Answer

1

Question 7

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

Accepted Answer

Ionic bonds involve the transfer of electrons, while covalent bonds involve sharing electrons.

Question 8

Which property of water allows it to dissolve many substances, making it an excellent solvent in biological systems?

Accepted Answer

Its ability to form hydrogen bonds

Question 9

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

Accepted Answer

$$6$$

Question 10

Which of the following statements about buffers is correct?

Accepted Answer

Buffers help maintain a stable pH in a solution.

Question 11

Which functional group is characterized by a carbon double-bonded to an oxygen and single-bonded to a hydroxyl group ($$-COOH$$)?

Accepted Answer

Carboxyl group

Question 12

Which of the following best explains why hydrocarbons are hydrophobic?

Accepted Answer

They lack polar functional groups and are nonpolar.

Question 13

Which of the following is true about isomers?

Accepted Answer

Isomers have the same molecular formula but different structures.

Question 14

A molecule of glucose ($$\mathrm{C}_6\mathrm{H}_{12}\mathrm{O}_6) is $$dissolved in water. Which property of water allows glucose to dissolve?

Accepted Answer

Water's polarity and ability to form hydrogen bonds

Question 15

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

Accepted Answer

Carbon forms the backbone of organic molecules due to its ability to form four covalent bonds.

Question 16

Which of the following statements about hydrophilic compounds is correct?

Accepted Answer

Hydrophilic compounds are polar and readily dissolve in water.

Question 17

If the dissociation constant ($$K_w) $$for water is $$1 	imes 10$$^{-14}$$, what is the concentration of $$[\mathrm{OH}^-]$$ in pure water at 25°C?

Accepted Answer

$$1 	imes 10$$^{-7}$$ M

Question 18

Which of the following is a correct statement about the electronic configuration of carbon?

Accepted Answer

Carbon has 6 electrons, with 2 in the first shell and 4 in the second shell.

Question 19

Which of the following best describes the difference between qualitative and quantitative data?

Accepted Answer

Quantitative data is numerical, while qualitative data is descriptive.

Question 20

Which of the following is a strong base?

Accepted Answer

$$\mathrm{NaOH} ($$sodium hydroxide)

General Biology Study Guide: Key Concepts and Principles

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