Question 1

Which of the following best describes a covalent bond?

Accepted Answer

A bond formed when two atoms share a pair of electrons.

Question 2

Which chemical reaction is responsible for joining monosaccharides into polysaccharides?

Accepted Answer

Dehydration synthesis

Question 3

What is the primary function of proteins in living organisms?

Accepted Answer

They provide structural support and catalyze biochemical reactions.

Question 4

Which of the following statements about acids is correct?

Accepted Answer

Acids release hydrogen ions ($$H^+) in $$solution, lowering the pH.

Question 5

A patient is infected with Giardia. Which of the following is the most likely route of transmission?

Accepted Answer

Consumption of contaminated water or food.

Question 6

Which of the following is a correct description of hydrolysis?

Accepted Answer

A chemical reaction where water is used to break down complex molecules into simpler ones.

Question 7

Why are unsaturated fatty acids typically liquid at room temperature?

Accepted Answer

They have kinks in the double bond chains, preventing molecules from packing tightly together.

Question 8

Which of the following is a plausible reason why antacids may increase susceptibility to foodborne illness?

Accepted Answer

Antacids lower stomach acidity, making it less hostile for bacteria to survive.

Question 9

Which of the following is NOT a way to reduce risk of infection from foodborne bacteria?

Accepted Answer

Consuming antacids regularly.

Question 10

Which of the following best describes an isotope?

Accepted Answer

Atoms with the same number of protons but different numbers of neutrons.

Question 11

Which bond is responsible for the double helix structure of DNA?

Accepted Answer

Hydrogen bond

Question 12

Which of the following is a polysaccharide?

Accepted Answer

Starch

Question 13

A patient presents with diarrhea after drinking water from a stream. Testing reveals Giardia. Which is the most important supportive care for this infection?

Accepted Answer

Supportive care from dehydration, antiparasitic medications, and rehydration

Question 14

Which of the following equations represents the release of a water molecule during dehydration synthesis?

Accepted Answer

$$A + B \rightarrow AB + H_2O$$

Question 15

Which of the following is a correct statement about the life cycle of Giardia?

Accepted Answer

Giardia cysts are shed in the stool and can contaminate water, continuing the cycle.

Question 16

Which of the following is a correct description of a protein?

Accepted Answer

Proteins are composed of amino acids linked together in specific sequences to form polypeptides.

Question 17

Which of the following is a correct description of dehydration synthesis?

Accepted Answer

A chemical reaction where two smaller molecules are joined together to form a larger molecule, with the release of a water molecule.

Question 18

Which of the following is a correct description of an ionic bond?

Accepted Answer

A bond formed from the transfer of electrons and the attraction between charges.

Question 19

Which of the following is a correct description of a hydrogen bond?

Accepted Answer

A bond between hydrogen atom and a full or partial negative charge of another atom such as oxygen or nitrogen.

Question 20

Which of the following is a correct description of an unsaturated fatty acid?

Accepted Answer

Unsaturated fats are typically liquid at room temperature due to kinks in the double bond chains, preventing molecules from packing tightly together.

Chapter 2 Study Guide

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