Q: A solution has a pH of 3. Which of the following statements is true?

The solution is acidic and has a high concentration of H\textsuperscript{+}.

Q: A patient is suffering from acidosis. Which of the following would help buffer the blood pH?

Adding a buffer that removes H\textsuperscript{+} ions from solution

Question 1

Which of the following best describes the difference between an atom and an element?

Accepted Answer

An atom is the smallest unit of matter that retains the properties of an element, while an element is defined by the number of subatomic particles in its atoms.

Question 2

A carbon atom has an atomic number of 6 and an atomic mass of 12. How many neutrons does it have?

Accepted Answer

6

Question 3

Which subatomic particle determines the chemical behavior of an atom?

Accepted Answer

Electron

Question 4

What is the primary function of carbohydrates in the human body?

Accepted Answer

Short-term energy source

Question 5

Which type of chemical bond involves the sharing of electron pairs between atoms?

Accepted Answer

Covalent bond

Question 6

A solution has a pH of 3. Which of the following statements is true?

Accepted Answer

The solution is acidic and has a high concentration of H	extsuperscript{+}.

Question 7

Which property of water allows it to act as a 'universal solvent' in biological systems?

Accepted Answer

Its ability to form hydrogen bonds due to its polarity

Question 8

Which of the following best explains why enzymes are necessary for life?

Accepted Answer

Enzymes speed up chemical reactions that would otherwise occur too slowly to support life.

Question 9

Which macromolecule is primarily responsible for storing and transmitting genetic information?

Accepted Answer

Nucleic acid

Question 10

A patient is suffering from acidosis. Which of the following would help buffer the blood pH?

Accepted Answer

Adding a buffer that removes H	extsuperscript{+} ions from solution

Question 11

Which of the following is true about the structure of DNA?

Accepted Answer

It is a double-stranded molecule with complementary base pairing.

Question 12

Which of the following best describes a decomposition reaction?

Accepted Answer

Breaking a larger molecule into smaller molecules

Question 13

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

Accepted Answer

Adenine pairs with thymine

Question 14

Which property of water helps protect the brain from injury?

Accepted Answer

Cushioning ability

Question 15

Which of the following statements about protein structure is correct?

Accepted Answer

Denaturation disrupts protein function by altering its structure.

Question 16

Which of the following is a polymer formed by dehydration synthesis of monomers?

Accepted Answer

A triglyceride formed from fatty acids and glycerol

Question 17

Which of the following best describes the role of ATP in the body?

Accepted Answer

ATP provides direct energy for most energy-requiring reactions.

Question 18

A molecule of water is formed by which type of chemical bond?

Accepted Answer

Covalent bond between hydrogen and oxygen

Question 19

Which of the following is true about enzymes?

Accepted Answer

Enzymes are specific to their substrate and are not used up in the reaction.

Question 20

Which of the following best explains why oil is not used as a lubricant in the body instead of water?

Accepted Answer

Oil is nonpolar and does not dissolve solutes as effectively as water.

Module 1: Chemistry Foundations for Anatomy & Physiology (BIOL 121)

Study Guide - Practice Questions

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