Question 1

In some proteins,an ionic bond may form between an amino acid with

Accepted Answer

A)  a positive R group and an amino acid with a negative R group.
B)  a negative R group and a nonpolar amino acid.
C)  a sulfhydryl group and an amino acid with an amine group.
D)  a carboxyl group and an amino acid with a C-terminal.
E)  a glycine and another with a tryptophan.F) B) and E)
G) B) and D)

Question 2

All isotopes of a given element have the same atomic mass.

Accepted Answer

A) True 
 B)False

Question 3

The numbers and types of atoms in a molecule as well as the spatial arrangement of those atoms is provided by the ________ formula.

Accepted Answer

The answer of The numbers and types of atoms in...

Question 4

If an element from the first column of the periodic table entered into a covalent bond with one from the sixth column,then the bond would be a

Accepted Answer

A)  polar bond,with the element from the first column developing a partial negative charge.
B)  polar bond,with the element from the sixth column developing a partial negative charge.
C)  nonpolar bond,with the element from the first column developing a partial positive charge.
D)  nonpolar bond,with the element from the sixth column developing a partial positive charge.
E)  nonpolar bond,with neither element developing any partial charges at all.F) A) and B)
G) A) and C)

Question 5

Explain the mechanisms by which certain changes in environmental conditions can denature proteins.

Accepted Answer

High temperatures weaken the intramolecu...

Question 6

A protein consists of

Accepted Answer

A)  an amine group,a carboxyl group,and an R group.
B)  more than 200 amino acids.
C)  between 3 and 20 amino acids.
D)  a C-terminal,several nucleic acids,and an N-terminal.E) A) and D)
F) A) and B)

Question 7

A beta sheet is an example of a secondary structure of a protein.

Accepted Answer

A) True 
 B)False

Question 8

The first amino acid put in place when a protein is being synthesized at a ribosome is

Accepted Answer

A)  glycine.
B)  tryptophan.
C)  methionine.
D)  cysteine.
E)  proline.F) B) and D)
G) A) and E)

Question 9

"Hydrophobic exclusion" refers to the chemical interactions that prevent nonpolar molecules from dissolving in water.

Accepted Answer

A) True 
 B)False

Question 10

When diagramming an atom,how many electrons can fit in each of the shells beyond the innermost shell

Accepted Answer

A)  Two
B)  Six
C)  Eight
D)  TenE) A) and B)
F) B) and D)

Question 11

Which statement accurately describes amino acids

Accepted Answer

A)  There are twenty varieties,with each type having a different R group.
B)  There are twenty varieties,with each type having a different C-terminal end.
C)  There are over 200 varieties,with each type having a different R group.
D)  There are over 200 varieties,with each type having a different C-terminal end.E) A) and B)
F) B) and D)

Question 12

An atom with a positive or negative charge is known as a(n)________.

Accepted Answer

The answer of An atom with a positive or negative...

Question 13

In general,lipids are water insoluble.

Accepted Answer

A) True 
 B)False

Question 14

Which of the following is a list of three types of lipids

Accepted Answer

A)  Riposes,purines,and pyrimidines
B)  Eicosanoids,steroids,and triglycerides
C)  Fatty acids,proteins,and nucleotides
D)  Glucose,starch,and triglycerides
E)  Steroids,peptides,and sugarsF) A) and B)
G) C) and E)

Question 15

A charged amino acid tends to decrease a protein's solubility in water.

Accepted Answer

A) True 
 B)False

Question 16

To neutralize a base,a(n) ________ must be added.

Accepted Answer

A)  acid
B)  buffer
C)  weak base
D)  hydroxide ionE) None of the above
F) All of the above

Question 17

An individual water molecule contains ______ atoms and enters into ______ hydrogen bonds with other water molecules.

Accepted Answer

A)  two;two
B)  three;two
C)  three;three
D)  three;four
E)  three;sixF) B) and E)
G) None of the above

Question 18

When elements found in column VIA of the periodic table become ions,they usually have a charge of

Accepted Answer

A)  -2.
B)  -1.
C)  +1.
D)  +2.
E)  +3.F) B) and D)
G) A) and B)

Question 19

Bicarbonate (HCO3-) is a

Accepted Answer

A)  strong proton donor.
B)  strong proton acceptor.
C)  weak proton donor.
D)  weak proton acceptor.E) B) and C)
F) B) and D)

Question 20

Sodium bicarbonate (NaHCO3)is considered an ionic compound.

Accepted Answer

A) True 
 B)False

Exam 2: Atoms,Ions,and Molecules

Which statement accurately describes amino acids

Correct AnswerverifiedShow Answer

A beta sheet is an example of a secondary structure of a protein.

Correct AnswerverifiedShow Answer

A protein consists of

Correct AnswerverifiedShow Answer

Explain the mechanisms by which certain changes in environmental conditions can denature proteins.

Correct AnswerverifiedHigh temperatures weaken the intramolecu...View AnswerShow Answer

In general,lipids are water insoluble.

Correct AnswerverifiedShow Answer

An atom with a positive or negative charge is known as a(n)________.

Correct AnswerverifiedShow Answer

All isotopes of a given element have the same atomic mass.

Correct AnswerverifiedShow Answer

If an element from the first column of the periodic table entered into a covalent bond with one from the sixth column,then the bond would be a

Correct AnswerverifiedShow Answer

Which of the following is a list of three types of lipids

Correct AnswerverifiedShow Answer

When elements found in column VIA of the periodic table become ions,they usually have a charge of

Correct AnswerverifiedShow Answer

To neutralize a base,a(n) ________ must be added.

Correct AnswerverifiedShow Answer

A charged amino acid tends to decrease a protein's solubility in water.

Correct AnswerverifiedShow Answer

Bicarbonate (HCO3-) is a

Correct AnswerverifiedShow Answer

An individual water molecule contains ______ atoms and enters into ______ hydrogen bonds with other water molecules.

Correct AnswerverifiedShow Answer

In some proteins,an ionic bond may form between an amino acid with

Correct AnswerverifiedShow Answer

The numbers and types of atoms in a molecule as well as the spatial arrangement of those atoms is provided by the ________ formula.

Correct AnswerverifiedShow Answer

Sodium bicarbonate (NaHCO3)is considered an ionic compound.

Correct AnswerverifiedShow Answer

"Hydrophobic exclusion" refers to the chemical interactions that prevent nonpolar molecules from dissolving in water.

Correct AnswerverifiedShow Answer

The first amino acid put in place when a protein is being synthesized at a ribosome is

Correct AnswerverifiedShow Answer

When diagramming an atom,how many electrons can fit in each of the shells beyond the innermost shell

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
High temperatures weaken the intramolecu...
View 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

Bicarbonate (HCO₃^-) is a

Correct Answer
verified

An individual water molecule contains atoms and enters into hydrogen bonds with other water molecules.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Sodium bicarbonate (NaHCO₃)is considered an ionic compound.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified