Question 1

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

Accepted Answer

Ionic bonds involve the transfer of electrons from one atom to another, resulting in charged ions, while covalent bonds involve the sharing of electrons between atoms.

Question 2

A solution has a hydrogen ion concentration of $[H^+] = 1 	imes 10^{-5}$ M. What is the pH of this solution?

Accepted Answer

$pH = 5$

Question 3

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

Accepted Answer

Combining two amino acids to form a dipeptide and releasing a molecule of water.

Question 4

Which of the following best explains why phospholipids are considered amphipathic molecules?

Accepted Answer

They have both hydrophilic (polar) heads and hydrophobic (non-polar) tails.

Question 5

Which of the following statements about enzymes is correct?

Accepted Answer

Enzymes act as biological catalysts by lowering the activation energy of reactions.

Question 6

A patient is diagnosed with a genetic disorder that affects the structure of their hemoglobin protein. Which level of protein structure is most directly affected if the amino acid sequence is altered?

Accepted Answer

Primary structure

Question 7

Which of the following is NOT a function of carbohydrates in the human body?

Accepted Answer

Storing genetic information

Question 8

Given the DNA sequence $5'	ext{-}ATGCGTACG-3'$, what is the complementary DNA strand?

Accepted Answer

$3'	ext{-}TACGCATGC-5'$

Question 9

Which of the following best describes the process of hydrolysis?

Accepted Answer

The breakdown of a polymer into monomers by adding a water molecule.

Question 10

Which of the following is a correct pairing of a macromolecule and its monomer?

Accepted Answer

Carbohydrate – Monosaccharide

Question 11

A triglyceride is composed of which of the following components?

Accepted Answer

Three fatty acids and one glycerol

Question 12

Which of the following best explains the difference between saturated and unsaturated fatty acids?

Accepted Answer

Saturated fatty acids contain only single bonds between carbon atoms, while unsaturated fatty acids contain one or more double bonds.

Question 13

Which of the following is NOT a component of a nucleotide?

Accepted Answer

A fatty acid

Question 14

Which of the following best describes the role of ATP in living systems?

Accepted Answer

ATP provides energy for cellular processes by releasing a phosphate group.

Question 15

Which of the following statements about DNA and RNA is correct?

Accepted Answer

DNA uses thymine as a base, while RNA uses uracil.

Question 16

A scientist is studying a molecule with the following formula: $C_{6}H_{12}O_{6}$. Which class of biomolecule does this most likely represent?

Accepted Answer

A monosaccharide

Question 17

Which of the following best describes the tertiary structure of a protein?

Accepted Answer

The overall three-dimensional shape of a single polypeptide chain.

Question 18

Which of the following is a correct example of a complementary base pair in DNA?

Accepted Answer

Cytosine – Guanine

Question 19

A patient’s blood pH drops from 7.4 to 7.1. Which of the following best describes this change?

Accepted Answer

The blood has become more acidic.

Question 20

Which of the following best explains why temperature and pH can affect enzyme activity?

Accepted Answer

They alter the shape of the enzyme’s active site, affecting substrate binding.

Ch 2: Chemistry Foundations for Anatomy & Physiology: Chapter 2 Study Guide

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