Question 1

Which of the following is a proton donor?

Accepted Answer

A)   an acid
B)   a base
C)   a salt
D)   glucose
E)   a neutral substanceF) A) and B)
G) C) and D)

Question 2

All of the synthesis reactions in the body are called

Accepted Answer

A)   catabolism.
B)   hydrolysis.
C)   oxidation-reduction.
D)   anabolism.
E)   dissociation.F) A) and E)
G) C) and D)

Question 3

An atom of chlorine has 17 protons and 18 neutrons. Which of the following statements is true?

Accepted Answer

A)   Chlorine atoms have 18 electrons.
B)   Chlorine has a mass number of 35.
C)   Chlorine has an atomic number of 18.
D)   Chlorine has 35 electrons.
E)   Chlorine has an atomic number of 35.F) A) and B)
G) C) and D)

Question 4

Electrons

Accepted Answer

A)   comprise the majority of the mass of an atom.
B)   are located in the nucleus of an atom.
C)   have a positive charge of one.
D)   are the subatomic particles most involved in bonding behavior of atoms.
E)   do not participate in the bonding of atoms.F) C) and D)
G) A) and D)

Question 5

-Water accounts for 50% of the weight of a young adult female and 60% of a young adult male. What kind of bond is found at "B"?

Accepted Answer

A)   hydrogen bond
B)   water molecule
C)   oxygen atom
D)   hydrogen atom
E)   polar covalent bondF) A) and B)
G) A) and C)

Question 6

Which of the following is a use of radioactive isotopes?

Accepted Answer

A)   treat cancer
B)   diagnose disorders
C)   sterilize materials
D)   All of these choices are correct.E) C) and D)
F) All of the above

Question 7

What protein structure results from folding or coiling of a polypeptide chain caused by hydrogen bonds between amino acids?

Accepted Answer

A)   quaternary structure
B)   tertiary structure
C)   secondary structure
D)   primary structure
E)   peptide structureF) B) and C)
G) D) and E)

Question 8

The minimum energy required to start a chemical reaction

Accepted Answer

A)   moves in energy surges.
B)   results from random molecular movement.
C)   comes from ionic energy motion.
D)   is elevated by a catalyst.
E)   can be lowered by enzymes.F) B) and D)
G) A) and C)

Question 9

Cobalt-60 is used for radiation treatments of cancer. How many protons does an atom of Co-60 have?

Accepted Answer

The answer of Cobalt-60 is used for radiation treatments of...

Question 10

In the reversible reaction, CO2 + H2O  ⟷\longleftrightarrow⟷   H2CO3  ⟷\longleftrightarrow⟷   H+ + HCO3- , a decrease in respiration rate will increase the concentration of CO2 in the blood. What will this do to the amount of H+ in the blood?

Accepted Answer

A)   H+ will increase.
B)   H+ will decrease.
C)   H+ will be unchanged. D) None of the above
E) A) and B)

Question 11

The pH value

Accepted Answer

A)   increases with acidity.
B)   is measured on a scale from 0 to 10.
C)   is determined by the concentration of hydrogen ions.
D)   reflects the sodium content of body fluids.
E)   decreases with alkalinity.F) A) and D)
G) B) and D)

Question 12

Which function of proteins is NOT correctly matched with the example?

Accepted Answer

A)   transport - hemoglobin
B)   structure - collagen and keratin
C)   regulation - enzymes and hormones
D)   protection - packing around organs and glands
E)   contraction - actin and myosin in musclesF) D) and E)
G) A) and E)

Question 13

Cobalt-60 is used for radiation treatments of cancer. How many electrons does an atom of Co-60 have?

Accepted Answer

The answer of Cobalt-60 is used for radiation treatments of...

Question 14

Which of the following chemical reactions best represents the decomposition of ATP?

Accepted Answer

A)   ATP + ADP  →\rightarrow→  ATP
B)   ADP + ADP + ADP  →\rightarrow→  ATP
C)   ATP + energy  →\rightarrow→  ADP + H2O
D)   ADP + Pi + energy  →\rightarrow→  ATP + H2O
E)   ATP + H2O  →\rightarrow→  ADP + Pi + energy F) A) and E)
G) A) and D)

Question 15

X-rays can be used to view bones because

Accepted Answer

A)   x-rays pass through bone.
B)   x-rays react with bone.
C)   x-rays can not pass through bone.
D)   bones are less dense than soft tissue.E) A) and C)
F) None of the above

Question 16

A cation is

Accepted Answer

A)   a combination of atoms held together by chemical bonds.
B)   a positively charged ion.
C)   a negatively charged ion.
D)   a molecule that conducts electricity when placed in solution.
E)   an alteration in the three-dimensional structure of a protein.F) B) and C)
G) C) and E)

Question 17

-Phospholipids are important components of the plasma membrane. What does "A" represent on the diagram?

Accepted Answer

A)   phosphorus
B)   oxygen
C)   nitrogen
D)   polar (hydrophilic)  region
E)   nonpolar (hydrophobic)  regionF) C) and D)
G) A) and E)

Question 18

-Phospholipids are important components of the plasma membrane. What does "B" represent on the diagram?

Accepted Answer

A)   phosphorus
B)   oxygen
C)   nitrogen
D)   polar (hydrophilic)  region
E)   nonpolar (hydrophobic)  regionF) None of the above
G) B) and E)

Question 19

Which of the following is mismatched?

Accepted Answer

A)   ribose--RNA
B)   enzyme--protein
C)   cholesterol--nucleic acid
D)   triglyceride--fat
E)   eicosanoid--prostaglandinF) A) and D)
G) B) and E)

Question 20

Carbon dioxide is considered a(n)

Accepted Answer

A)   molecule.
B)   compound.
C)   molecule and a compound.
D)   element.
E)   ion.F) A) and B)
G) A) and E)

Exam 2: The Chemical Basis of Life

Which of the following is a proton donor?

Correct AnswerverifiedShow Answer

-Phospholipids are important components of the plasma membrane. What does "B" represent on the diagram?

Correct AnswerverifiedShow Answer

Which of the following chemical reactions best represents the decomposition of ATP?

Correct AnswerverifiedShow Answer

Carbon dioxide is considered a(n)

Correct AnswerverifiedShow Answer

All of the synthesis reactions in the body are called

Correct AnswerverifiedShow Answer

-Phospholipids are important components of the plasma membrane. What does "A" represent on the diagram?

Correct AnswerverifiedShow Answer

Which function of proteins is NOT correctly matched with the example?

Correct AnswerverifiedShow Answer

Which of the following is mismatched?

Correct AnswerverifiedShow Answer

X-rays can be used to view bones because

Correct AnswerverifiedShow Answer

Electrons

Correct AnswerverifiedShow Answer

The minimum energy required to start a chemical reaction

Correct AnswerverifiedShow Answer

Cobalt-60 is used for radiation treatments of cancer. How many protons does an atom of Co-60 have?

Correct AnswerverifiedShow Answer

A cation is

Correct AnswerverifiedShow Answer

What protein structure results from folding or coiling of a polypeptide chain caused by hydrogen bonds between amino acids?

Correct AnswerverifiedShow Answer

An atom of chlorine has 17 protons and 18 neutrons. Which of the following statements is true?

Correct AnswerverifiedShow Answer

-Water accounts for 50% of the weight of a young adult female and 60% of a young adult male. What kind of bond is found at "B"?

Correct AnswerverifiedShow Answer

In the reversible reaction, CO2 + H2O ⟷\longleftrightarrow⟷ H2CO3 ⟷\longleftrightarrow⟷ H+ + HCO3- , a decrease in respiration rate will increase the concentration of CO2 in the blood. What will this do to the amount of H+ in the blood?

Correct AnswerverifiedShow Answer

Which of the following is a use of radioactive isotopes?

Correct AnswerverifiedShow Answer

The pH value

Correct AnswerverifiedShow Answer

Cobalt-60 is used for radiation treatments of cancer. How many electrons does an atom of Co-60 have?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

In the reversible reaction, CO₂ + H₂O $\longleftrightarrow$ H₂CO₃ $\longleftrightarrow$ H⁺ + HCO₃- , a decrease in respiration rate will increase the concentration of CO₂ in the blood. What will this do to the amount of H⁺ in the blood?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified