Question 1

Which grouping of elements is found in carbohydrates?

Accepted Answer

A)  C - H - O
B)  C - H - P
C)  H - O - Cl
D)  N - S - O
E)  Ca - H - OF) B) and D)
G) All of the above

Question 2

The sex hormones belong to which category of lipids?

Accepted Answer

A)  steroids
B)  fats
C)  oils
D)  triglycerides
E)  phospholipidsF) B) and E)
G) C) and D)

Question 3

Why is He positioned above Ne in the periodic table?

Accepted Answer

A)  They both have the same atomic mass.
B)  They both have the same number of electrons in their outermost orbital.
C)  They both have a full outermost orbital.
D)  They both have the same atomic number.
E)  They both have the same number of protons in their nuclei.F) B) and C)
G) A) and D)

Question 4

ATP is called the energy currency of the body because it is a type of electricity.

Accepted Answer

A) True 
 B)False

Question 5

A fat contains how many fatty acids?

Accepted Answer

A)  1
B)  2
C)  3
D)  4
E)  5F) All of the above
G) A) and E)

Question 6

What substance is used in medicine to produce various images of organs and tissues?

Accepted Answer

A)  A mixture
B)  A tracer
C)  An emulsion
D)  A colloid
E)  A sensorF) All of the above
G) A) and B)

Question 7

Which of the following is not one of the four classes of organic molecules found in cells?

Accepted Answer

A)  vitamins
B)  lipids
C)  proteins
D)  carbohydrates
E)  nucleic acidsF) B) and E)
G) A) and B) A

Question 8

In an acidic solution

Accepted Answer

A)  the number of H+ is less than the number of OH-.
B)  the number of H+ is greater than the number of OH-.
C)  the number of H+ is equal to the number of OH-.
D)  the number of H+ is 3 times less than the number of OH-.
E)  the number of H+ is 10 times less than the number of OH-.F) D) and E)
G) A) and E) B

Question 9

Our body is capable of converting starch into glycogen.

Accepted Answer

A) True 
 B)False

Question 10

Which of the following is not present in a nucleotide?

Accepted Answer

A)  phosphate
B)  nitrogenous base
C)  5 ring sugar
D)  an R group
E)  a pentoseF) A) and E)
G) B) and D)

Question 11

Be has an atomic number of 4 and an atomic mass of 9.How many protons does it have?

Accepted Answer

A)  4
B)  5
C)  9
D)  13
E)  7F) A) and B)
G) B) and C)

Question 12

Fats and oils function better than other biological molecules as energy-storage molecules because of the carbon they contain.

Accepted Answer

A) True 
 B)False

Question 13

Which polysaccharide is branched the most?

Accepted Answer

A)  cellulose
B)  starch
C)  glycogen
D)  glucose
E)  fructoseF) A) and E)
G) C) and D)

Question 14

Which of the following nitrogenous bases is NOT found in DNA?

Accepted Answer

A)  cytosine
B)  thymine
C)  uracil
D)  guanine
E)  adenineF) A) and B)
G) A) and D)

Question 15

The sides of the DNA ladder (backbone) are

Accepted Answer

A)  alternating carbons and nitrogens.
B)  the R groups.
C)  the nitrogenous bases.
D)  alternating nitrogens and phosphates.
E)  sugars and phosphates.F) A) and D)
G) A) and C)

Question 16

Sugars with three to seven carbon atoms are called

Accepted Answer

A)  monosaccharides.
B)  disaccharides.
C)  trisaccharides.
D)  polysaccharides.
E)  steroids.F) A) and E)
G) D) and E)

Question 17

The smallest unit of an element that still retains the chemical and physical properties of that element is called

Accepted Answer

A)  an isotope.
B)  a nucleus.
C)  an atom.
D)  a molecular bonD.
E)  a neutrino.F) A) and C)
G) B) and E)

Question 18

The membranes of cells are composed of

Accepted Answer

A)  phospholipids.
B)  fats.
C)  oils.
D)  steroids.
E)  triglycerides.F) C) and D)
G) A) and B)

Question 19

A fatty acid that contains only single bonds between the carbon atoms is considered

Accepted Answer

A)  saturated.
B)  unsaturated.
C)  trans unsaturated.
D)  a cholestrol.
E)  a steroid.F) C) and D)
G) D) and E)

Question 20

The primary level of protein structure is composed of amino acids in a linear sequence joined by peptide bonds.

Accepted Answer

A) True 
 B)False  True

Exam 2: Chemistry of Life

Which grouping of elements is found in carbohydrates?

Correct AnswerverifiedShow Answer

The sex hormones belong to which category of lipids?

Correct AnswerverifiedShow Answer

Why is He positioned above Ne in the periodic table?

Correct AnswerverifiedShow Answer

ATP is called the energy currency of the body because it is a type of electricity.

Correct AnswerverifiedShow Answer

A fat contains how many fatty acids?

Correct AnswerverifiedShow Answer

What substance is used in medicine to produce various images of organs and tissues?

Correct AnswerverifiedShow Answer

Which of the following is not one of the four classes of organic molecules found in cells?

Correct AnswerverifiedA

In an acidic solution

Correct AnswerverifiedB

Our body is capable of converting starch into glycogen.

Correct AnswerverifiedShow Answer

Which of the following is not present in a nucleotide?

Correct AnswerverifiedShow Answer

Be has an atomic number of 4 and an atomic mass of 9.How many protons does it have?

Correct AnswerverifiedShow Answer

Fats and oils function better than other biological molecules as energy-storage molecules because of the carbon they contain.

Correct AnswerverifiedShow Answer

Which polysaccharide is branched the most?

Correct AnswerverifiedShow Answer

Which of the following nitrogenous bases is NOT found in DNA?

Correct AnswerverifiedShow Answer

The sides of the DNA ladder (backbone) are

Correct AnswerverifiedShow Answer

Sugars with three to seven carbon atoms are called

Correct AnswerverifiedShow Answer

The smallest unit of an element that still retains the chemical and physical properties of that element is called

Correct AnswerverifiedShow Answer

The membranes of cells are composed of

Correct AnswerverifiedShow Answer

A fatty acid that contains only single bonds between the carbon atoms is considered

Correct AnswerverifiedShow Answer

The primary level of protein structure is composed of amino acids in a linear sequence joined by peptide bonds.

Correct AnswerverifiedTrue

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A

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True