Q: Which equation correctly represents the cellular respiration of glucose?

$$ \mathrm{C_6H_{12}O_6$} + 6\,\mathrm{O_2$} \rightarrow 6\,\mathrm{CO_2$} + 6\,\mathrm{H_2O} + \text{energy} $$

Question 1

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

Accepted Answer

A molecule consists of two or more atoms chemically bonded, while a compound consists of two or more different elements bonded together.

Question 2

Which property of water allows it to moderate temperature changes in living organisms?

Accepted Answer

High heat capacity

Question 3

A buffer system in blood resists changes in pH by:

Accepted Answer

Binding hydrogen ions when pH decreases and releasing them when pH increases.

Question 4

Which equation correctly represents the cellular respiration of glucose?

Accepted Answer

$$ \mathrm{C_6H_{12}O_6$} + 6\,\mathrm{O_2$} ightarrow 6\,\mathrm{CO_2$} + 6\,\mathrm{H_2O} + 	ext{energy} $$

Question 5

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

Accepted Answer

Storing genetic information

Question 6

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

Accepted Answer

Covalent bond

Question 7

A solution is made by dissolving 10 grams of NaCl in enough water to make 1 liter of solution. What is the molarity ($$M) of $$the solution? ($$	ext{Molar mass of NaCl} = 58.44\,\mathrm{g/mol})$$

Accepted Answer

$$ M = \dfrac{10}{58.44} = 0.171\,\mathrm{mol/L} $$

Question 8

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

Accepted Answer

They lower the energy of activation, allowing reactions to occur faster.

Question 9

Which of the following is a property of acids?

Accepted Answer

Release protons ($$\mathrm{H^+}) in $$solution

Question 10

Which of the following statements about lipids is correct?

Accepted Answer

Lipids are used for energy storage, insulation, and cushioning.

Question 11

Which of the following is true about the orbital model of the atom?

Accepted Answer

Electrons occupy regions of space called orbitals around the nucleus.

Question 12

Which of the following is a correct statement about dehydration synthesis?

Accepted Answer

It joins monomers together by removing a molecule of water.

Question 13

Which of the following best describes the role of ATP in cellular metabolism?

Accepted Answer

ATP provides energy for chemical reactions.

Question 14

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

Accepted Answer

A buffer resists changes in pH by binding or releasing $$\mathrm{H^+}$$ ions.

Question 15

Which of the following is NOT a property that makes water vital to life?

Accepted Answer

Low heat of vaporization

Question 16

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

Accepted Answer

Primary structure refers to the sequence of amino acids.

Question 17

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

Accepted Answer

DNA contains thymine, while RNA contains uracil.

Question 18

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

Accepted Answer

A solution with pH 7 is neutral.

Question 19

Which of the following is a correct statement about carbohydrates?

Accepted Answer

Monosaccharides are formed by hydrolysis of polysaccharides.

Basic Chemistry and Biochemistry for Anatomy & Physiology

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