Q: Which equation best represents the decomposition of ATP to release energy?

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

Question 1

Which of the following best explains why water is considered the most important and abundant inorganic compound in all living systems?

Accepted Answer

Water's polarity allows it to dissolve many substances and participate in chemical reactions.

Question 2

A patient is found to have a blood pH of 7.25. According to the acid-base balance concept, what condition does this indicate?

Accepted Answer

Acidosis

Question 3

Which of the following statements about atomic structure is correct?

Accepted Answer

The number of electrons in a neutral atom equals the number of protons.

Question 4

Which formula correctly represents the relationship between atomic number ($$Z$$), number of protons ($$p$$), and number of electrons ($$e) in a $$neutral atom?

Accepted Answer

$$Z = p = e$$

Question 5

Which of the following is a property of water that helps regulate body temperature?

Accepted Answer

Water has a high heat of vaporization.

Question 6

A molecule of sodium chloride (NaCl) is formed by which type of chemical bond?

Accepted Answer

Ionic bond

Question 7

Which of the following best describes an exergonic chemical reaction?

Accepted Answer

A reaction in which the energy released is greater than the energy required to break bonds.

Question 8

Which equation best represents the decomposition of ATP to release energy?

Accepted Answer

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

Question 9

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

Accepted Answer

Regulating processes and serving as enzymes

Question 10

Which of the following statements about enzymes is true?

Accepted Answer

Enzymes lower the activation energy required for reactions.

Question 11

Which of the following best describes a buffer system in the body?

Accepted Answer

A system that maintains pH by converting strong acids or bases into weak ones.

Question 12

Which of the following is NOT a property of lipids?

Accepted Answer

They are readily soluble in water due to their polar nature.

Question 13

Which of the following statements about fatty acids is correct?

Accepted Answer

Monounsaturated fatty acids contain one double covalent bond.

Question 14

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

Accepted Answer

DNA is double-stranded and contains thymine.

Question 15

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

Accepted Answer

ATP is the principal energy-transferring molecule.

Question 16

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

Accepted Answer

A bond formed by the sharing of electrons between atoms.

Question 17

Which of the following is a correct statement about isotopes?

Accepted Answer

Isotopes have the same number of protons but different numbers of neutrons.

Question 18

Which of the following best explains why enzymes are highly specific?

Accepted Answer

Enzymes have active sites that fit only specific substrate molecules.

Question 19

Which of the following is a correct statement about the pH scale?

Accepted Answer

A solution with pH 7 is neutral.

Question 20

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

Accepted Answer

A reaction in which two or more atoms, ions, or molecules combine to form new and larger molecules.

Chapter 2: The Chemical Level of Organization – Study Notes

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