Q: Which of the following best describes the relationship between ATP, ADP, and energy in the cell?

$$ATP \rightarrow ADP + P + \text{energy}$$

Question 1

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

Accepted Answer

An atom is the smallest unit of matter, while a molecule is made up of two or more atoms bonded together.

Question 2

Which of the following is an example of an ion commonly found in the human body?

Accepted Answer

Na+

Question 3

What type of chemical bond is formed when electrons are transferred from one atom to another, resulting in oppositely charged ions that attract each other?

Accepted Answer

Ionic bond

Question 4

Which of the following statements about water is TRUE?

Accepted Answer

Water is a polar covalent molecule that forms hydrogen bonds.

Question 5

A patient is experiencing acidosis, with a blood pH of 7.20. Which of the following best explains what is happening at the molecular level?

Accepted Answer

There is an increased concentration of $$H^+$$ ions in the blood.

Question 6

Which of the following best describes the function of buffers in the human body?

Accepted Answer

Buffers help maintain pH homeostasis by donating or accepting $$H^+$$ ions.

Question 7

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

Accepted Answer

Two monosaccharides combine to form a disaccharide, releasing $$H_2O.$$

Question 8

Which of the following statements about lipids is FALSE?

Accepted Answer

Lipids are generally polar and dissolve easily in water.

Question 9

A protein loses its function after being exposed to high heat. What is the most likely explanation for this?

Accepted Answer

The protein has been denatured, losing its three-dimensional structure.

Question 10

Which of the following best explains why enzymes are important in biological systems?

Accepted Answer

Enzymes lower the activation energy required for chemical reactions to occur.

Question 11

Which of the following is a correct pairing of a nucleic acid and its function?

Accepted Answer

DNA – stores genetic information and directs protein synthesis

Question 12

Which of the following best describes the relationship between ATP, ADP, and energy in the cell?

Accepted Answer

$$ATP ightarrow ADP + P + 	ext{energy}$$

Question 13

A patient is unable to digest cellulose from plant material. What is the most likely reason for this?

Accepted Answer

Humans lack the enzymes necessary to break the bonds in cellulose.

Question 14

Which of the following best explains why phospholipids are essential for cell membrane structure?

Accepted Answer

They have hydrophilic heads and hydrophobic tails, allowing them to form a bilayer in water.

Question 15

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

Accepted Answer

A covalent bond formed between the amino group of one amino acid and the carboxyl group of another.

Question 16

A mutation changes a single nucleotide in the DNA sequence for hemoglobin, resulting in sickle cell anemia. What is the most direct effect of this mutation?

Accepted Answer

It changes one amino acid in the hemoglobin protein, altering its shape and function.

Question 17

Which of the following best explains why 'like dissolves like' in chemistry?

Accepted Answer

Polar compounds dissolve in polar solvents, and nonpolar compounds dissolve in nonpolar solvents.

Question 18

Which of the following is a function of cholesterol in the human body?

Accepted Answer

It is a component of plasma (cell) membranes.

Question 19

Which of the following best describes the difference between a saturated and an unsaturated fatty acid?

Accepted Answer

Saturated fatty acids have no double bonds between carbon atoms, while unsaturated fatty acids have one or more double bonds.

Question 20

A patient is given a medication that acts as a weak base. What effect will this have on the patient's blood pH?

Accepted Answer

It will increase the blood pH by accepting $$H^+$$ ions.

Chemistry Foundations for Anatomy & Physiology

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