Question 1

Which of the following is the primary function of carbohydrates in living organisms?

Accepted Answer

A) Carbohydrates are used as long-term energy storage. 
B) Carbohydrates store hereditary information. 
C) Carbohydrates form the basic structural framework of all cell membranes. 
D) Carbohydrates are used as an immediate energy source. 
A) Carbohydrates are used as long-term energy storage. 
B) Carbohydrates store hereditary information. 
C) Carbohydrates form the basic structural framework of all cell membranes. 
D) Carbohydrates are used as an immediate energy source. D

Question 2

Due to an increased risk of heart disease many doctors have suggested shifting our diet to include more unsaturated fats and less saturated fats.As you cook dinner tonight the recipe calls for two Tbs of oil.Which of the following would be the healthiest choice?

Accepted Answer

A) olive or safflower oil 
B) pork fat 
C) melted butter 
D) lard that was left out at room temperature 
E) All of these choices are saturated fats. 
A) olive or safflower oil 
B) pork fat 
C) melted butter 
D) lard that was left out at room temperature 
E) All of these choices are saturated fats. A

Question 3

A dehydration reaction can also be called a(n)________ reaction since it forms water.

Accepted Answer

A) condensation 
B) hydrolysis 
C) isomeric 
D) energy-releasing 
E) monomer formation 
A) condensation 
B) hydrolysis 
C) isomeric 
D) energy-releasing 
E) monomer formation A

Question 4

A carbon atom can form up to three single covalent bonds with other atoms.

Accepted Answer

A) True 
 B)False

Question 5

Organic molecules are those that contain at least

Accepted Answer

A) carbon. 
B) carbon and oxygen. 
C) carbon and hydrogen. 
D) carbon,oxygen,and hydrogen. 
A) carbon. 
B) carbon and oxygen. 
C) carbon and hydrogen. 
D) carbon,oxygen,and hydrogen.

Question 6

Which of these statements is NOT true about DNA?

Accepted Answer

A) It is the genetic material of the cell. 
B) It forms a double helix. 
C) Adenine pairs with thymine and guanine pairs with cytosine. 
D) It contains the sugar ribose. 
E) The sugar and phosphate groups form the backbone of the molecule. 
A) It is the genetic material of the cell. 
B) It forms a double helix. 
C) Adenine pairs with thymine and guanine pairs with cytosine. 
D) It contains the sugar ribose. 
E) The sugar and phosphate groups form the backbone of the molecule.

Question 7

The reactivity of an organic molecule is primarily dependent upon ________ of the molecule.

Accepted Answer

A) the carbon skeleton 
B) the attached functional groups 
C) the isomer 
D) All of the choices are correct. 
A) the carbon skeleton 
B) the attached functional groups 
C) the isomer 
D) All of the choices are correct.

Question 8

How do the lipids of the cell membrane and the lipids found in butter and vegetable oil differ?

Accepted Answer

A) the number of fatty acids 
B) the type of glycerol molecule 
C) the carbon to carbon bonds 
D) Lipids of the cell membrane are solid at body temperature whereas the lipids found in vegetable oil and butter are liquid at body temperature. 
A) the number of fatty acids 
B) the type of glycerol molecule 
C) the carbon to carbon bonds 
D) Lipids of the cell membrane are solid at body temperature whereas the lipids found in vegetable oil and butter are liquid at body temperature.

Question 9

ATP is a nucleotide that functions in providing energy for cellular work.

Accepted Answer

A) True 
 B)False

Question 10

Which functional group when attached to a hydrocarbon chain will form an alcohol?

Accepted Answer

A) hydroxyl 
B) carbonyl 
C) carboxyl 
D) amino 
E) phosphate 
A) hydroxyl 
B) carbonyl 
C) carboxyl 
D) amino 
E) phosphate

Question 11

Saturated fatty acids and unsaturated fatty acids differ in

Accepted Answer

A) the number of carbon-to-carbon bonds. 
B) the consistency at room temperature. 
C) the number of hydrogen atoms present. 
D) All of the choices are differences between saturated and unsaturated fatty acids. 
A) the number of carbon-to-carbon bonds. 
B) the consistency at room temperature. 
C) the number of hydrogen atoms present. 
D) All of the choices are differences between saturated and unsaturated fatty acids.

Question 12

Which statement is true about RNA?

Accepted Answer

A) It contains adenine paired to thymine. 
B) One of the bases from DNA is replaced by uracil. 
C) It contains the sugar deoxyribose. 
D) Its nucleotides contain twice as many phosphate groups as DNA's nucleotides. 
E) It is a double-stranded molecule. 
A) It contains adenine paired to thymine. 
B) One of the bases from DNA is replaced by uracil. 
C) It contains the sugar deoxyribose. 
D) Its nucleotides contain twice as many phosphate groups as DNA's nucleotides. 
E) It is a double-stranded molecule.

Question 13

You come across an image of a molecule in research article about fatty acids.You notice the molecule has several double bonds in its structure.Based on your knowledge of fatty acids,you conclude that this molecule is most likely

Accepted Answer

A) a saturated fatty acid. 
B) an unsaturated fatty acid. 
C) something other than a fatty acid because fatty acids don't have double bonds. 
A) a saturated fatty acid. 
B) an unsaturated fatty acid. 
C) something other than a fatty acid because fatty acids don't have double bonds.

Question 14

A peptide bond is found in which type of biological molecule?

Accepted Answer

A) carbohydrate 
B) lipid 
C) nucleic acid 
D) protein 
A) carbohydrate 
B) lipid 
C) nucleic acid 
D) protein

Question 15

Which carbohydrate is found in the cell walls of plants?

Accepted Answer

A) starch 
B) chitin 
C) cellulose 
D) glycogen 
E) glycerol 
A) starch 
B) chitin 
C) cellulose 
D) glycogen 
E) glycerol

Question 16

Which of the following is NOT a function of proteins?

Accepted Answer

A) support 
B) transportation 
C) defense 
D) motion 
E) insulation 
A) support 
B) transportation 
C) defense 
D) motion 
E) insulation

Question 17

What term is used for molecules that have identical molecular formulas but the atoms in each molecule are arranged differently?

Accepted Answer

A) isotope 
B) isomer 
C) homomolecules 
D) organic 
E) balanced 
A) isotope 
B) isomer 
C) homomolecules 
D) organic 
E) balanced

Question 18

In lab,your biology instructor has asked you to identify an unknown solution.During one of the tests you perform your sample turns light purple indicating the presence of peptide bonds.Based on this information,you determine your solution contains

Accepted Answer

A) lipids. 
B) protein. 
C) starch. 
D) DNA. 
E) monosaccharides. 
A) lipids. 
B) protein. 
C) starch. 
D) DNA. 
E) monosaccharides.

Question 19

Which of the following are structural carbohydrate molecules?

Accepted Answer

A) starch and glycogen 
B) starch and cellulose 
C) glycogen and cellulose 
D) cellulose and chitin 
E) glycogen and chitin 
A) starch and glycogen 
B) starch and cellulose 
C) glycogen and cellulose 
D) cellulose and chitin 
E) glycogen and chitin

Question 20

Which of the following structures is classified as a nucleic acid?

Accepted Answer

A) myosin 
B) RNA 
C) glucose 
D) glycerol 
E) cytosine 
A) myosin 
B) RNA 
C) glucose 
D) glycerol 
E) cytosine

Exam 3: The Chemistry of Organic Molecules

Which of the following is the primary function of carbohydrates in living organisms?

Due to an increased risk of heart disease many doctors have suggested shifting our diet to include more unsaturated fats and less saturated fats.As you cook dinner tonight the recipe calls for two Tbs of oil.Which of the following would be the healthiest choice?

A dehydration reaction can also be called a(n)________ reaction since it forms water.

A carbon atom can form up to three single covalent bonds with other atoms.

Organic molecules are those that contain at least

Which of these statements is NOT true about DNA?

The reactivity of an organic molecule is primarily dependent upon ________ of the molecule.

How do the lipids of the cell membrane and the lipids found in butter and vegetable oil differ?

ATP is a nucleotide that functions in providing energy for cellular work.

Which functional group when attached to a hydrocarbon chain will form an alcohol?

Saturated fatty acids and unsaturated fatty acids differ in

Which statement is true about RNA?

You come across an image of a molecule in research article about fatty acids.You notice the molecule has several double bonds in its structure.Based on your knowledge of fatty acids,you conclude that this molecule is most likely

A peptide bond is found in which type of biological molecule?

Which carbohydrate is found in the cell walls of plants?

Which of the following is NOT a function of proteins?

What term is used for molecules that have identical molecular formulas but the atoms in each molecule are arranged differently?

In lab,your biology instructor has asked you to identify an unknown solution.During one of the tests you perform your sample turns light purple indicating the presence of peptide bonds.Based on this information,you determine your solution contains

Which of the following are structural carbohydrate molecules?

Which of the following structures is classified as a nucleic acid?

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