Question 1

Which of the following best describes the hierarchical sequence of biological organization from smallest to largest?

Accepted Answer

Atom → Molecule → Cell → Organism → Biosphere

Question 2

Which statement accurately reflects Darwin’s theory of natural selection?

Accepted Answer

Organisms with traits best suited to their environment are more likely to survive and reproduce.

Question 3

In a scientific experiment, which variable is manipulated by the researcher?

Accepted Answer

Independent variable

Question 4

Which of the following is NOT a subatomic particle found in the nucleus of an atom?

Accepted Answer

Electron

Question 5

A molecule of water ($$\mathrm{H_2O}) is $$held together by which type of bond?

Accepted Answer

Covalent bond

Question 6

Which element is most abundant in living organisms?

Accepted Answer

Oxygen

Question 7

Balance the following chemical equation: $$\mathrm{C_6H_{12}O_6$} + 6\mathrm{O_2$} \rightarrow 6\mathrm{CO_2$} + 6\mathrm{H_2O}$$

Accepted Answer

The equation is already balanced.

Question 8

Which organic compound is primarily used for long-term energy storage in animals?

Accepted Answer

Lipids

Question 9

Which of the following is a polysaccharide found in plants?

Accepted Answer

Starch

Question 10

What is the function of hydrolysis in biological systems?

Accepted Answer

Breaking down polymers into monomers by adding water

Question 11

Which organelle is responsible for energy production in eukaryotic cells?

Accepted Answer

Mitochondrion

Question 12

Which of the following structures is found in plant cells but not in animal cells?

Accepted Answer

Cell wall

Question 13

Which of the following best describes the difference between DNA and RNA?

Accepted Answer

DNA contains deoxyribose sugar; RNA contains ribose sugar.

Question 14

Which nitrogenous base is found in RNA but not in DNA?

Accepted Answer

Uracil

Question 15

A scientist wants to observe the detailed structure of a cell’s organelles. Which type of microscope should they use?

Accepted Answer

Transmission electron microscope

Question 16

Which of the following best describes a nucleotide?

Accepted Answer

A molecule consisting of a phosphate group, a sugar, and a nitrogenous base

Question 17

Which type of junction allows for direct cytoplasmic communication between adjacent animal cells?

Accepted Answer

Gap junction

Question 18

Which process is responsible for the synthesis of proteins from amino acids?

Accepted Answer

Dehydration synthesis

Question 19

Which of the following is a function of the endomembrane system in eukaryotic cells?

Accepted Answer

Transport and modification of proteins

Question 20

If a solution has a pH of 4, how many times more acidic is it than a solution with a pH of 7?

Accepted Answer

$$10^3 = 1000$ times more acidic

General Biology: Foundational Concepts and Key Topics

Study Guide - Practice Questions