Question 1

What is the building block molecule of a protein?

Accepted Answer

A)  monosaccharide
B)  amino acid
C)  nucleic acid
D)  fatty acid
E)  glycerolF) A) and C)
G) D) and E)

Question 2

The three forms of matter are:

Accepted Answer

A)  air,water,and solids.
B)  solids,liquids,and gases.
C)  blood,bone,and air.
D)  vapor,water,and solid.E) A) and B)
F) B) and D)

Question 3

Eicosanoids

Accepted Answer

A)  are structural proteins.
B)  comprise the genetic material.
C)  are components of the plasma membrane.
D)  play a role in the response of tissues to injuries.
E)  are fat-soluble vitamins.F) A) and B)
G) A) and C)

Question 4

True or False? The importance of O2 in the human body is to extract energy (ATP)from food molecules.

Accepted Answer

A) True 
 B)False

Question 5

Reactions that use water to split molecules apart are called _______ reactions.

Accepted Answer

A)  reversible
B)  synthesis
C)  oxidation
D)  dehydration
E)  hydrolysisF) A) and B)
G) B) and E)

Question 6

Deoxyribose is a sugar found in

Accepted Answer

A)  RNA.
B)  DNA.
C)  glycogen.
D)  starch.
E)  ATP.F) A) and C)
G) A) and D)

Question 7

A base is a proton

Accepted Answer

A)  donor.
B)  converter.
C)  acceptor.
D)  creator.
E)  Both acceptor and creator.F) A) and B)
G) A) and C)

Question 8

An atom has an atomic number of 19 and a mass number of 39.This atom will have

Accepted Answer

A)  19 neutrons.
B)  39 neutrons.
C)  20 electrons.
D)  20 neutrons.
E)  58 neutrons.F) A) and B)
G) B) and D)

Question 9

The minimum amount of energy that reactants must have to start a chemical reaction is called

Accepted Answer

A)  potential energy.
B)  mechanical energy.
C)  kinetic energy.
D)  activation energy.
E)  electromagnetic energy.F) A) and D)
G) C) and D)

Question 10

A solution that contains one osmole of solute in one kilogram (kg) of water is called a

Accepted Answer

A)  1% solution.
B)  1 molar solution.
C)  10% solution.
D)  1 osmolal solution.
E)  None of these choices are correct.F) A) and B)
G) C) and E)

Question 11

The mass of a chemical equal to its molecular weight in grams,containing 6.023 x 1023 molecules is a(n)

Accepted Answer

A)   atomic mass unit
B)   ion
C)   mole
D)   molarityE) All of the above
F) A) and D)

Question 12

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 decrease.
B)  H+ will increase.
C)  H+ will be unchanged. D) A) and B)
E) All of the above

Question 13

The number of atoms in exactly 12 grams of carbon-12 is called

Accepted Answer

A)  Socrates's number.
B)  Le Chatelier's number.
C)  Dalton's number.
D)  Avogadro's number.
E)  Pasteur's number.F) B) and E)
G) B) and D)

Question 14

The mass number of an atom is the number of

Accepted Answer

A)  electrons plus neutrons in the atom.
B)  neutrons in the atom.
C)  neutrons plus protons in the atom.
D)  protons in the atom.
E)  protons plus electrons in the atom.F) A) and B)
G) A) and E)

Question 15

Sucrose is formed when the simple sugars fructose and glucose are covalently bonded.This reaction releases water.What type of reaction is this?

Accepted Answer

A)   monomeric
B)   hydrolysis
C)   catabolic
D)   dehydrationE) B) and D)
F) B) and C)

Question 16

-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 "A"?

Accepted Answer

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

Question 17

The minimum energy required to start a chemical reaction

Accepted Answer

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

Question 18

Adjacent amino acids in a polypeptide chain are held together by

Accepted Answer

A)  hydrogen bonds.
B)  high energy bonds.
C)  peptide bonds.
D)  Van der Waals bonds.
E)  ionic bonds.F) B) and C)
G) A) and D)

Question 19

Chemical reactions with the property of being able to proceed from reactants to products and from products to reactants are called

Accepted Answer

A)  synthesis reactions.
B)  decomposition reactions.
C)  exchange reactions.
D)  reversible reactions.
E)  net reaction rates.F) B) and C)
G) D) and E)

Question 20

ATP

Accepted Answer

A)  can be synthesized from ADP.
B)  stores and releases energy in the cell.
C)  is associated with a reversible reaction.
D)  is associated with anabolism and catabolism.
E)  All of these choices are correct.F) C) and D)
G) A) and B)

Exam 2: The Chemical Basis of Life

True or False? The importance of O2 in the human body is to extract energy (ATP)from food molecules.

Correct AnswerverifiedShow Answer

The minimum amount of energy that reactants must have to start a chemical reaction is called

Correct AnswerverifiedShow Answer

What is the building block molecule of a protein?

Correct AnswerverifiedShow Answer

A solution that contains one osmole of solute in one kilogram (kg) of water is called a

Correct AnswerverifiedShow Answer

The number of atoms in exactly 12 grams of carbon-12 is called

Correct AnswerverifiedShow Answer

The three forms of matter are:

Correct AnswerverifiedShow Answer

Deoxyribose is a sugar found in

Correct AnswerverifiedShow Answer

The mass number of an atom is the number of

Correct AnswerverifiedShow Answer

The mass of a chemical equal to its molecular weight in grams,containing 6.023 x 1023 molecules is a(n)

Correct AnswerverifiedShow Answer

Eicosanoids

Correct AnswerverifiedShow Answer

Sucrose is formed when the simple sugars fructose and glucose are covalently bonded.This reaction releases water.What type of reaction is this?

Correct AnswerverifiedShow Answer

Reactions that use water to split molecules apart are called _______ reactions.

Correct AnswerverifiedShow Answer

Adjacent amino acids in a polypeptide chain are held together by

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 "A"?

Correct AnswerverifiedShow Answer

An atom has an atomic number of 19 and a mass number of 39.This atom will have

Correct AnswerverifiedShow Answer

The minimum energy required to start a chemical reaction

Correct AnswerverifiedShow Answer

Chemical reactions with the property of being able to proceed from reactants to products and from products to reactants are called

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

ATP

Correct AnswerverifiedShow Answer

A base is a proton

Correct AnswerverifiedShow Answer

True or False? The importance of O₂ in the human body is to extract energy (ATP)from food molecules.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The mass of a chemical equal to its molecular weight in grams,containing 6.023 x 10²³ molecules is a(n)

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