Question 1

Cations are

Accepted Answer

A)  charged subatomic particles.
B)  atoms that have gained electrons.
C)  radioactive isotopes.
D)  capable of forming ionic bonds with anions.
E)  atoms without protons.F) A) and D)
G) C) and D)

Question 2

A newly synthesized polypeptide will ultimately be located within the phospholipid bilayer of the plasma membrane.When this polypeptide folds to form its tertiary structure, the _____________ amino acid R-groups will most likely be facing outward.

Accepted Answer

A)  hydrophilic
B)  hydrophobicC) A) and B)
D) undefined

Question 3

If solution A has a lower pH compared to solution B, then solution A is more acidic than solution B.

Accepted Answer

A) True 
 B)False

Question 4

Elements have predictable chemical properties.

Accepted Answer

A) True 
 B)False

Question 5

Explain what radioisotopes are, and describe how they can be used to monitor the uptake of a specific biochemical by a microbial culture.

Accepted Answer

Radioisotopes are isotopes of an element...

Question 6

Protons and neutrons make up the atom's central core referred to as its _____.

Accepted Answer

The answer of Protons and neutrons make up the atom's...

Question 7

The electrons of an atom are

Accepted Answer

A)  always equal in number to the number of neutrons in an atom.
B)  found in the nucleus.
C)  used to determine atomic number.
D)  positively charged.
E)  moving in pathways called orbitals.F) A) and C)
G) A) and D)

Question 8

Select the incorrect statement.

Accepted Answer

A)  Molecules contain atoms.
B)  Compounds may contain only one type of atom.
C)  Compounds contain molecules.
D)  Atoms are joined by chemical bonds forming molecules.
E)  Molecules may contain two of the same type of atom.F) A) and E)
G) None of the above

Question 9

All of the following are polysaccharides, except

Accepted Answer

A)  dextran in some bacterial slime layers.
B)  agar used to make solid culture media.
C)  a cell's glycocalyx.
D)  cellulose in certain cell walls.
E)  prostaglandins in inflammation.F) A) and E)
G) A) and B)

Question 10

During protein synthesis, genes in DNA are copied, making _____ RNA.

Accepted Answer

The answer of During protein synthesis, genes in DNA are...

Question 11

An amino acid contains all of the following except

Accepted Answer

A)  an amino group.
B)  a carboxyl group.
C)  a variable R group.
D)  a carbon atom.
E)  a nitrogenous base.F) A) and B)
G) A) and E)

Question 12

A covalent bond is formed between an anion and a cation.

Accepted Answer

A) True 
 B)False

Question 13

C6H12O6 + C6H12O6 →C12H22O11 + H2O is an example of

Accepted Answer

A)  formation of a peptide bond.
B)  a decomposition reaction.
C)  denaturation.
D)  a hydrolytic reaction.
E)  dehydration synthesis.F) B) and D)
G) B) and C)

Question 14

All of the following are correct about triglycerides, except

Accepted Answer

A)  triglycerides are insoluble in water.
B)  triglycerides are a concentrated source of energy.
C)  unsaturated triglycerides are solid at room temperature.
D)  triglycerides dissolve in nonpolar solvents.
E)  triglycerides are hydrolyzed by lipases.F) All of the above
G) D) and E)

Question 15

The total number of protons and neutrons of an element establishes its _____ number.

Accepted Answer

The answer of The total number of protons and neutrons...

Question 16

Compared to a solution of pH 9, a solution of pH 7

Accepted Answer

A)  is more basic.
B)  has no OH- ions.
C)  has more H+ ions.
D)  has a higher pH.
E)  All of these choices are correct.F) D) and E)
G) A) and B)

Question 17

Organic chemicals always have a basic framework of the element _____ bonded to other atoms.

Accepted Answer

The answer of Organic chemicals always have a basic framework...

Question 18

Which of the following is found in DNA but not in RNA?

Accepted Answer

A)  ribose
B)  adenine
C)  thymine
D)  uracil
E)  nucleotidesF) B) and C)
G) A) and B)

Question 19

Compare and contrast the chemical and functional characteristics of DNA and RNA molecules.

Accepted Answer

DNA and RNA are both nucleic acids, but ...

Question 20

During cellular reactions, electrons may be removed from compounds such as glucose and picked up by a coenzyme known as NAD+.When NAD+ gains these electrons, it is said to be

Accepted Answer

A)  oxidized.
B)  reduced.
C)  synthesized.
D)  dehydrated.E) None of the above
F) A) and B)

Exam 2: The Chemistry of Biology

All of the following are correct about triglycerides, except

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Compare and contrast the chemical and functional characteristics of DNA and RNA molecules.

Correct AnswerAnswered by ExamLex AIDNA and RNA are both nucleic acids, but ...View AnswerShow Answer

During cellular reactions, electrons may be removed from compounds such as glucose and picked up by a coenzyme known as NAD+.When NAD+ gains these electrons, it is said to be

Correct AnswerverifiedShow Answer

All of the following are polysaccharides, except

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Compared to a solution of pH 9, a solution of pH 7

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Cations are

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Protons and neutrons make up the atom's central core referred to as its _____.

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Elements have predictable chemical properties.

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Organic chemicals always have a basic framework of the element _____ bonded to other atoms.

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Select the incorrect statement.

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The electrons of an atom are

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An amino acid contains all of the following except

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The total number of protons and neutrons of an element establishes its _____ number.

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During protein synthesis, genes in DNA are copied, making _____ RNA.

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C6H12O6 + C6H12O6 →C12H22O11 + H2O is an example of

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If solution A has a lower pH compared to solution B, then solution A is more acidic than solution B.

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Explain what radioisotopes are, and describe how they can be used to monitor the uptake of a specific biochemical by a microbial culture.

Correct AnswerAnswered by ExamLex AIRadioisotopes are isotopes of an element...View AnswerShow Answer

A newly synthesized polypeptide will ultimately be located within the phospholipid bilayer of the plasma membrane.When this polypeptide folds to form its tertiary structure, the _____________ amino acid R-groups will most likely be facing outward.

Correct AnswerverifiedShow Answer

Which of the following is found in DNA but not in RNA?

Correct AnswerverifiedShow Answer

A covalent bond is formed between an anion and a cation.

Correct AnswerverifiedShow Answer

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DNA and RNA are both nucleic acids, but ...
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During cellular reactions, electrons may be removed from compounds such as glucose and picked up by a coenzyme known as NAD⁺.When NAD⁺ gains these electrons, it is said to be

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C₆H₁₂O₆ + C₆H₁₂O₆ →C₁₂H₂₂O₁₁ + H₂O is an example of

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Radioisotopes are isotopes of an element...
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