Question 1

A species has 29% of its DNA composed of the nucleotide containing guanine (G) .What percent does the nitrogen base thymine (T) equal?

Accepted Answer

A)  58%
B)  42%
C)  21%
D)  67%
E)  29%F) B) and C)
G) A) and B)

Question 2

CaCl2 is a salt that forms as the result of what type of bond?

Accepted Answer

A)  covalent
B)  hydrogen
C)  polar
D)  non-polar
E)  ionicF) B) and C)
G) A) and E)

Question 3

In biology,calling something organic means that it was grown without the use of any type of herbicide.

Accepted Answer

A) True 
 B)False

Question 4

A combination of two or more atoms of the same type is called

Accepted Answer

A)  an atomic unit.
B)  a molecule.
C)  a compound.
D)  an isotope.
E)  an ion.F) A) and E)
G) B) and D)

Question 5

The presence of a buffer in our blood is an example of homeostasis.

Accepted Answer

A) True 
 B)False

Question 6

What passes through the digestive tract as fiber or roughage?

Accepted Answer

A)  Maltose
B)  Glucose
C)  Glycogen
D)  Starch
E)  CelluloseF) B) and D)
G) A) and B)

Question 7

Which polysaccharide is consumed as a source of fiber?

Accepted Answer

A)  cellulose
B)  glycogen
C)  glucose
D)  chitin
E)  starchF) B) and C)
G) A) and B)

Question 8

How many elements occur naturally?

Accepted Answer

A)  112
B)  92
C)  64
D)  32
E)  6F) A) and E)
G) A) and C)

Question 9

Ca3(PO4) 2 represents a/an

Accepted Answer

A)  element.
B)  mixture.
C)  compound.
D)  isotope.
E)  atom.F) B) and E)
G) A) and E)

Question 10

Why does a protein not function after it has been denatured?

Accepted Answer

A)  The normal bonding between the R groups has been disturbed and the protein loses its normal shape.
B)  The normal bonding between the beta sheets has been disturbed and the protein loses its normal shape.
C)  The normal bonding between the hydrogens in the alpha helix has been disturbed and the protein loses its normal shape.
D)  The R groups form additional bonds causing the structure to become more compact.
E)  The normal peptide bonds are ruptured and the individual amino acids are not held together any morE.F) C) and D)
G) All of the above

Question 11

Radiation can produce both positive and negative effects for humans.

Accepted Answer

A) True 
 B)False

Question 12

Which of the following elements will have more than 2 electrons and have a full outer orbital?

Accepted Answer

A)  He
B)  Ne
C)  C
D)  N
E)  OF) B) and D)
G) B) and E)

Question 13

After lunch our digestive system will use the process of hydrolysis to break the food down into smaller subunits.

Accepted Answer

A) True 
 B)False

Question 14

The monomer unit of a protein is

Accepted Answer

A)  fatty acids.
B)  amino acids.
C)  monosaccharides.
D)  polysaccharides.
E)  nucleic acids.F) A) and E)
G) D) and E)

Question 15

All amino acids are alike in that their R groups are polar.

Accepted Answer

A) True 
 B)False

Question 16

ATP carries energy in the form of high-energy

Accepted Answer

A)  carbohydrate bonds.
B)  peptide bonds.
C)  lipid bonds.
D)  phosphate bonds.
E)  hydrogen bondsF) All of the above
G) A) and B)

Question 17

Describe the structure and function of the DNA molecule.

Accepted Answer

DNA is composed of a phosphate group,nit...

Question 18

An alpha helix or a beta sheet are examples of what level of protein structure?

Accepted Answer

A)  secondary
B)  primary
C)  tertiary
D)  quaternary
E)  octagonF) A) and B)
G) A) and E)

Question 19

The atomic number of an atom is determined by the number of

Accepted Answer

A)  protons.
B)  neutrons.
C)  electrons.
D)  protons and neutrons.
E)  protons and electrons.F) A) and D)
G) A) and B)

Question 20

Which of the following foods would be a good source of fiber?

Accepted Answer

A)  All of these are good sources of fiber.
B)  peaches
C)  whole wheat bread
D)  peanuts
E)  bran cerealF) A) and B)
G) A) and E)

Exam 2: Chemistry of Life

A species has 29% of its DNA composed of the nucleotide containing guanine (G) .What percent does the nitrogen base thymine (T) equal?

Correct AnswerverifiedShow Answer

Radiation can produce both positive and negative effects for humans.

Correct AnswerverifiedShow Answer

Describe the structure and function of the DNA molecule.

Correct AnswerverifiedDNA is composed of a phosphate group,nit...View AnswerShow Answer

Why does a protein not function after it has been denatured?

Correct AnswerverifiedShow Answer

ATP carries energy in the form of high-energy

Correct AnswerverifiedShow Answer

The presence of a buffer in our blood is an example of homeostasis.

Correct AnswerverifiedShow Answer

All amino acids are alike in that their R groups are polar.

Correct AnswerverifiedShow Answer

What passes through the digestive tract as fiber or roughage?

Correct AnswerverifiedShow Answer

The atomic number of an atom is determined by the number of

Correct AnswerverifiedShow Answer

In biology,calling something organic means that it was grown without the use of any type of herbicide.

Correct AnswerverifiedShow Answer

Which of the following foods would be a good source of fiber?

Correct AnswerverifiedShow Answer

An alpha helix or a beta sheet are examples of what level of protein structure?

Correct AnswerverifiedShow Answer

The monomer unit of a protein is

Correct AnswerverifiedShow Answer

After lunch our digestive system will use the process of hydrolysis to break the food down into smaller subunits.

Correct AnswerverifiedShow Answer

A combination of two or more atoms of the same type is called

Correct AnswerverifiedShow Answer

How many elements occur naturally?

Correct AnswerverifiedShow Answer

Ca3(PO4) 2 represents a/an

Correct AnswerverifiedShow Answer

Which of the following elements will have more than 2 electrons and have a full outer orbital?

Correct AnswerverifiedShow Answer

Which polysaccharide is consumed as a source of fiber?

Correct AnswerverifiedShow Answer

CaCl2 is a salt that forms as the result of what type of bond?

Correct AnswerverifiedShow Answer

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DNA is composed of a phosphate group,nit...
View Answer

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Ca₃(PO₄) ₂ represents a/an

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CaCl₂ is a salt that forms as the result of what type of bond?

Correct Answer
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