Question 1

Which of the following best describes an amphipathic molecule?

Accepted Answer

A molecule that contains both hydrophilic and hydrophobic regions

Question 2

Given the electronegativity values: $O = 3.5$, $N = 3.0$, $C = 2.5$, $H = 2.1$, which bond is most polar?

Accepted Answer

O-H

Question 3

Which of the following is NOT a function of carbohydrates in living organisms?

Accepted Answer

Catalyzing chemical reactions

Question 4

A hydrogen bond forms between which parts of two water molecules?

Accepted Answer

Between the hydrogen atom of one molecule and the oxygen atom of another

Question 5

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

Accepted Answer

Hydrogen bonds between water molecules require significant energy to break

Question 6

Which of the following is a correct example of a dehydration synthesis reaction?

Accepted Answer

Joining two monosaccharides to form a disaccharide, releasing water

Question 7

Which of the following statements about lipids is TRUE?

Accepted Answer

Phospholipids have both hydrophobic and hydrophilic regions

Question 8

Which of the following bonds is responsible for the secondary structure of proteins?

Accepted Answer

Hydrogen bonds between backbone atoms

Question 9

Which of the following is the correct sequence for the flow of genetic information according to the Central Dogma of biology?

Accepted Answer

DNA $\rightarrow$ RNA $\rightarrow$ Protein

Question 10

Which of the following is a function of antibodies in the immune system?

Accepted Answer

Bind to antigens and mark them for destruction

Question 11

Which of the following best describes the difference between innate and acquired immunity?

Accepted Answer

Innate immunity is present from birth and responds quickly, while acquired immunity develops after exposure and is specific

Question 12

Which of the following is a correct statement about the structure of nucleic acids?

Accepted Answer

DNA contains deoxyribose sugar, while RNA contains ribose sugar

Question 13

Which of the following is a correct example of a polar covalent bond?

Accepted Answer

Bond between oxygen and hydrogen in water

Question 14

Which of the following is a correct description of a hydrolysis reaction?

Accepted Answer

A reaction that breaks a polymer into monomers by adding water

Question 15

Which of the following is a correct statement about the quaternary structure of proteins?

Accepted Answer

It involves the interaction of multiple polypeptide chains

Question 16

Which of the following is a correct statement about the difference between qualitative and quantitative data?

Accepted Answer

Qualitative data are descriptions, while quantitative data are numerical measurements

Question 17

Which of the following is a correct example of a monomer for proteins?

Accepted Answer

Amino acid

Question 18

Which of the following is a correct statement about the function of phospholipids in cell membranes?

Accepted Answer

They form a bilayer with hydrophilic heads facing outward and hydrophobic tails facing inward

Question 19

Which of the following is a correct statement about the role of enzymes in biological reactions?

Accepted Answer

Enzymes decrease the activation energy required for reactions

Question 20

Which of the following is a correct statement about the immune response to allergies?

Accepted Answer

Allergies involve an overreaction of the immune system to harmless substances

General Biology Study Guide: Chemical Context, Water, Macromolecules, and Immune System

Study Guide - Practice Questions