Question 1

An atom with three electrons would have a valence of .

Accepted Answer

The answer of An atom with three electrons would have...

Question 2

Choose the answer that best describes fibrous proteins.

Accepted Answer

A)  are very stable and insoluble in water
B)  are cellular catalysts
C)  are usually called enzymes
D)  rarely exhibit secondary structureE) A) and C)
F) B) and C)

Question 3

What happens in redox reactions?

Accepted Answer

A)  the reaction is always easily reversible
B)  the electron donor is reduced
C)  both decomposition and electron exchange occur
D)  the electron acceptor is oxidizedE) None of the above
F) All of the above

Question 4

What is a dipole?

Accepted Answer

A)  a type of bond
B)  a type of reaction
C)  a polar molecule
D)  an organic moleculeE) C) and D)
F) B) and D)

Question 5

In liquid XYZ,you notice that light is scattered as it passes through.There is no precipitant in the bottom of the beaker,though it has been sitting for several days.What type of liquid is this?

Accepted Answer

A)  solution
B)  mixture
C)  colloid
D)  suspensionE) None of the above
F) A) and D)

Question 6

Which of the following elements is necessary for proper conduction of nervous impulses?

Accepted Answer

A)  Fe
B)  P
C)  I
D)  NaE) A) and D)
F) A) and C)

Question 7

The genetic information is coded in DNA by the .

Accepted Answer

A)  arrangement of the histones
B)  three- dimensional structure of the double helix
C)  sequence of the nucleotides
D)  regular alteration of sugar and phosphate moleculesE) A) and B)
F) A) and C)

Question 8

How can phospholipids form a film when mixed in water?

Accepted Answer

Phospholipids have both polar ...

Question 9

Which of the following is the major positive ion outside cells?

Accepted Answer

A)  sodium
B)  hydrogen
C)  potassium
D)  nitrogenE) None of the above
F) B) and C)

Question 10

Select the most correct statement regarding nucleic acids.

Accepted Answer

A)  TDNA is considered a molecular slave of DNA.
B)  Three forms exist: DNA,RNA,and tDNA.
C)  RNA is a long,single- stranded molecule made up of the bases A,T,G,and C.
D)  DNA is a long,double- stranded molecule made up of A,T,G,and C bases.E) B) and D)
F) A) and B)

Question 11

Heat shock proteins hsp) are a type of protein called .

Accepted Answer

A)  cofactors
B)  coenzymes
C)  eicosanoids
D)  chaperonesE) None of the above
F) All of the above

Question 12

Starch is the stored carbohydrate in plants,while is the stored carbohydrate in animals.

Accepted Answer

The answer of Starch is the stored carbohydrate in plants,while...

Question 13

Protons and electrons exist in every atom nucleus except hydrogen.Is this statement true or false and why?

Accepted Answer

False-Hydrogen has o...

Question 14

Choose the statement that is false or incorrect.

Accepted Answer

A)  Exergonic reactions release more energy than they absorb.
B)  A key feature of the body's metabolism is the almost exclusive use of exergonic reactions by the body.
C)  Endergonic reactions absorb more energy than they release.
D)  In chemical reactions,breaking old bonds requires energy and forming new bonds releases energy.E) B) and D)
F) B) and C)

Question 15

Choose the answer that best describes HCO3- .

Accepted Answer

A)  a bicarbonate ion
B)  a proton donor
C)  common in the liver
D)  a weak acidE) A) and C)
F) A) and B)

Question 16

What is the ratio of fatty acids to glycerol in neutral fats?

Accepted Answer

A)  2:1
B)  1:1
C)  3:1
D)  4:1E) A) and B)
F) B) and C)

Question 17

Amino acids joining together to make a peptide is a good example of an) reaction.

Accepted Answer

A)  reversible
B)  synthesis
C)  decomposition
D)  exchangeE) None of the above
F) A) and B)

Question 18

Which of the following is a neutralization reaction?

Accepted Answer

A)  NH3 + H+ -NH4+2
B)  HCl -H+ + Cl-
C)  NaOH -Na+ + OH-
D)  HCl + NaOH -NaCl + H2OE) B) and C)
F) A) and D)

Question 19

Two good examples of a colloid would be Jell- O® and .

Accepted Answer

A)  urine
B)  toenails
C)  blood
D)  cytosolE) A) and B)
F) None of the above

Question 20

Sucrose is a .

Accepted Answer

A)  disaccharide
B)  monosaccharide
C)  polysaccharide
D)  triglycerideE) A) and D)
F) None of the above

Exam 2: Chemistry Comes Alive

What is a dipole?

Correct AnswerverifiedShow Answer

Which of the following is the major positive ion outside cells?

Correct AnswerverifiedShow Answer

Protons and electrons exist in every atom nucleus except hydrogen.Is this statement true or false and why?

Correct AnswerverifiedFalse-Hydrogen has o...View AnswerShow Answer

Sucrose is a .

Correct AnswerverifiedShow Answer

In liquid XYZ,you notice that light is scattered as it passes through.There is no precipitant in the bottom of the beaker,though it has been sitting for several days.What type of liquid is this?

Correct AnswerverifiedShow Answer

Choose the answer that best describes fibrous proteins.

Correct AnswerverifiedShow Answer

How can phospholipids form a film when mixed in water?

Correct AnswerverifiedPhospholipids have both polar ...View AnswerShow Answer

The genetic information is coded in DNA by the .

Correct AnswerverifiedShow Answer

Heat shock proteins hsp) are a type of protein called .

Correct AnswerverifiedShow Answer

Which of the following elements is necessary for proper conduction of nervous impulses?

Correct AnswerverifiedShow Answer

Two good examples of a colloid would be Jell- O® and .

Correct AnswerverifiedShow Answer

What happens in redox reactions?

Correct AnswerverifiedShow Answer

Choose the answer that best describes HCO3- .

Correct AnswerverifiedShow Answer

An atom with three electrons would have a valence of .

Correct AnswerverifiedShow Answer

What is the ratio of fatty acids to glycerol in neutral fats?

Correct AnswerverifiedShow Answer

Starch is the stored carbohydrate in plants,while is the stored carbohydrate in animals.

Correct AnswerverifiedShow Answer

Amino acids joining together to make a peptide is a good example of an) reaction.

Correct AnswerverifiedShow Answer

Select the most correct statement regarding nucleic acids.

Correct AnswerverifiedShow Answer

Which of the following is a neutralization reaction?

Correct AnswerverifiedShow Answer

Choose the statement that is false or incorrect.

Correct AnswerverifiedShow Answer

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False-Hydrogen has o...
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Phospholipids have both polar ...
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