Question 1

Classify this structure. ​

Accepted Answer

A)  Dipeptide 
B)  Fatty acid 
C)  Polypeptide 
D)  Protein 
E)  Triglyceride 
A)  Dipeptide 
B)  Fatty acid 
C)  Polypeptide 
D)  Protein 
E)  Triglyceride C

Question 2

Which of these quaternary interactions occur between nonpolar R groups?

Accepted Answer

A)  Hydrogen bonds 
B)  Disulfide linkages 
C)  Salt bridges 
D)  Hydrophobic interactions 
E)  None of these 
A)  Hydrogen bonds 
B)  Disulfide linkages 
C)  Salt bridges 
D)  Hydrophobic interactions 
E)  None of these D

Question 3

Which of these is/are polysaccharide(s)?
I. Glucose
II. Cellulose
III. Fructose
IV. Starch

Accepted Answer

A)  I only 
B)  II only 
C)  II and III 
D)  I and II 
E)  II and IV 
A)  I only 
B)  II only 
C)  II and III 
D)  I and II 
E)  II and IV E

Question 4

Which of these property/ properties is /are true for starch but not for cellulose?
I. It consists of a long chain of glucose molecules.
II. Its monosaccharide units are connected by beta linkages.
III. The neighboring monosaccharides form hydrogen bonds.
IV. Its polysaccharides are easily broken down by enzymes in the body.

Accepted Answer

A)  IV only 
B)  I and III 
C)  II and III 
D)  III and IV 
E)  II, III, and IV 
A)  IV only 
B)  I and III 
C)  II and III 
D)  III and IV 
E)  II, III, and IV

Question 5

Identify the most accurate statement about triglycerides.

Accepted Answer

A)  Triglycerides are made from a combination of fatty acids and glycerol. 
B)  Unsaturated triglycerides will be liquids at room temperature. 
C)  Triglycerides can act as moisturizers to prevent dryness. 
D)  Fats and oils serve as insulation for the body. 
E)  All of these are correct. 
A)  Triglycerides are made from a combination of fatty acids and glycerol. 
B)  Unsaturated triglycerides will be liquids at room temperature. 
C)  Triglycerides can act as moisturizers to prevent dryness. 
D)  Fats and oils serve as insulation for the body. 
E)  All of these are correct.

Question 6

Which of these molecules is not a lipid?

Accepted Answer

A)  Fatty acid 
B)  Oil 
C)  Vitamin A 
D)  Starch 
E)  Triglyceride 
A)  Fatty acid 
B)  Oil 
C)  Vitamin A 
D)  Starch 
E)  Triglyceride

Question 7

Which of these is /are  not a monosaccharide(s)?
I. Glucose
II. Fructose
III. Sucrose

Accepted Answer

A)  I only 
B)  III only 
C)  II and III 
D)  I and II 
E)  I and III 
A)  I only 
B)  III only 
C)  II and III 
D)  I and II 
E)  I and III

Question 8

Which of these interactions are not characteristics of quaternary and tertiary protein structures?

Accepted Answer

A)  Hydrogen bonds 
B)  Disulfide linkages 
C)  Salt bridges 
D)  Peptide bonds 
E)  Hydrophobic interactions 
A)  Hydrogen bonds 
B)  Disulfide linkages 
C)  Salt bridges 
D)  Peptide bonds 
E)  Hydrophobic interactions

Question 9

Which of these forces hold the two complementary strands of DNA together?

Accepted Answer

A)  Hydrogen bonds 
B)  Disulfide linkages 
C)  Salt bridges 
D)  Hydrophobic interactions 
E)  Peptide bonds 
A)  Hydrogen bonds 
B)  Disulfide linkages 
C)  Salt bridges 
D)  Hydrophobic interactions 
E)  Peptide bonds

Question 10

Which vitamin is not a lipid?

Accepted Answer

A)  Vitamin A 
B)  Vitamin C 
C)  Vitamin D 
D)  Vitamin E 
E)  Vitamin K 
A)  Vitamin A 
B)  Vitamin C 
C)  Vitamin D 
D)  Vitamin E 
E)  Vitamin K

Question 11

Which of these is the general formula of a carbohydrate?

Accepted Answer

A)  ROH 
B)  CH2O 
C)  COOH 
D)  C2H2 
E)  CHO 
A)  ROH 
B)  CH2O 
C)  COOH 
D)  C2H2 
E)  CHO

Question 12

Which of these is a basic amino acid?

Accepted Answer

A)  Valine 
B)  Aspartic acid 
C)  Histidine 
D)  Tryptophan 
E)  Serine 
A)  Valine 
B)  Aspartic acid 
C)  Histidine 
D)  Tryptophan 
E)  Serine

Question 13

Which of these is not an application of genetic engineering?

Accepted Answer

A)  Insulin production 
B)  Spoilage-resistant plants 
C)  Beef-producing cow 
D)  Cloning 
E)  Organic farming 
A)  Insulin production 
B)  Spoilage-resistant plants 
C)  Beef-producing cow 
D)  Cloning 
E)  Organic farming

Question 14

Which of these determines the secondary structure of a protein?

Accepted Answer

A)  Sequence of amino acids 
B)  Ratio of the number of acidic amino acids to the number of basic amino acids 
C)  Number of carbon bonds in the chain of amino acids 
D)  Alpha helices and pleated sheets along the axis of the protein 
E)  Distance between amino acids 
A)  Sequence of amino acids 
B)  Ratio of the number of acidic amino acids to the number of basic amino acids 
C)  Number of carbon bonds in the chain of amino acids 
D)  Alpha helices and pleated sheets along the axis of the protein 
E)  Distance between amino acids

Question 15

Amino acids are linked together by _____ to form proteins.

Accepted Answer

A)  disulfide linkages 
B)  hydrogen bonds 
C)  alpha linkages 
D)  hydrophobic interactions 
E)  peptide bonds 
A)  disulfide linkages 
B)  hydrogen bonds 
C)  alpha linkages 
D)  hydrophobic interactions 
E)  peptide bonds

Question 16

Which of these determines the primary structure of a protein?

Accepted Answer

A)  Sequence of amino acids 
B)  Number of hydrogen bonds 
C)  Ratio of the number of acidic amino acids to the number of basic amino acids 
D)  Polarity of the R groups attached to the amino acids 
E)  Number of alpha helices and pleated sheets along the axis of the protein 
A)  Sequence of amino acids 
B)  Number of hydrogen bonds 
C)  Ratio of the number of acidic amino acids to the number of basic amino acids 
D)  Polarity of the R groups attached to the amino acids 
E)  Number of alpha helices and pleated sheets along the axis of the protein

Question 17

Compared with a saturated fat with the same number of carbon atoms, a monounsaturated fat will contain:

Accepted Answer

A)  one more hydrogen atom. 
B)  two more hydrogen atoms. 
C)  one fewer hydrogen atom. 
D)  two fewer hydrogen atoms. 
E)  three more hydrogen atoms. 
A)  one more hydrogen atom. 
B)  two more hydrogen atoms. 
C)  one fewer hydrogen atom. 
D)  two fewer hydrogen atoms. 
E)  three more hydrogen atoms.

Question 18

Which of these is an example of a protein that acts as a hormone?

Accepted Answer

A)  Hemoglobin 
B)  Insulin 
C)  Keratin 
D)  Lysozyme 
E)  Valine 
A)  Hemoglobin 
B)  Insulin 
C)  Keratin 
D)  Lysozyme 
E)  Valine

Question 19

The alpha helix structure is a _____ structure of proteins.

Accepted Answer

A)  primary 
B)  secondary 
C)  tertiary 
D)  quaternary 
E)  parent 
A)  primary 
B)  secondary 
C)  tertiary 
D)  quaternary 
E)  parent

Question 20

Which of these control a majority of our body's chemistry?

Accepted Answer

A)  Lipids 
B)  Nucleic acids 
C)  Carbohydrates 
D)  Proteins 
E)  Vitamins 
A)  Lipids 
B)  Nucleic acids 
C)  Carbohydrates 
D)  Proteins 
E)  Vitamins

Classify this structure.

Which of these quaternary interactions occur between nonpolar R groups?

Which of these is/are polysaccharide(s)? I. Glucose II. Cellulose III. Fructose IV. Starch

Identify the most accurate statement about triglycerides.

Which of these molecules is not a lipid?

Which of these is /are not a monosaccharide(s)? I. Glucose II. Fructose III. Sucrose

Which of these interactions are not characteristics of quaternary and tertiary protein structures?

Which of these forces hold the two complementary strands of DNA together?

Which vitamin is not a lipid?

Which of these is the general formula of a carbohydrate?

Which of these is a basic amino acid?

Which of these is not an application of genetic engineering?

Which of these determines the secondary structure of a protein?

Amino acids are linked together by _____ to form proteins.

Which of these determines the primary structure of a protein?

Compared with a saturated fat with the same number of carbon atoms, a monounsaturated fat will contain:

Which of these is an example of a protein that acts as a hormone?

The alpha helix structure is a _____ structure of proteins.

Which of these control a majority of our body's chemistry?

Molecular Reasons

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Exam 16: Biochemistry and Biotechnology

Classify this structure. ​

Which of these quaternary interactions occur between nonpolar R groups?

Which of these is/are polysaccharide(s)? I. Glucose II. Cellulose III. Fructose IV. Starch

Identify the most accurate statement about triglycerides.

Which of these molecules is not a lipid?

Which of these is /are not a monosaccharide(s)? I. Glucose II. Fructose III. Sucrose

Which of these interactions are not characteristics of quaternary and tertiary protein structures?

Which of these forces hold the two complementary strands of DNA together?

Which vitamin is not a lipid?

Which of these is the general formula of a carbohydrate?

Which of these is a basic amino acid?

Which of these is not an application of genetic engineering?

Which of these determines the secondary structure of a protein?

Amino acids are linked together by _____ to form proteins.

Which of these determines the primary structure of a protein?

Compared with a saturated fat with the same number of carbon atoms, a monounsaturated fat will contain:

Which of these is an example of a protein that acts as a hormone?

The alpha helix structure is a _____ structure of proteins.

Which of these control a majority of our body's chemistry?

Molecular Reasons

The Chemists Toolbox

Atoms and Elements

Molecules, Compounds, and Chemical Reactions

Chemical Bonding

Organic Chemistry

Light and Color

Nuclear Chemistry

Energy for Today

Energy for Tomorrow: Solar and Other Renewable Energy Sources

The Air Around Us

The Liquids and Solids Around Us: Especially Water

Acids and Bases: the Molecules Responsible for Sour and Bitter

Oxidation and Reduction

The Chemistry of Household Products

Drugs and Medicine: Healing, Helping, and Hurting

The Chemistry of Food

Nanotechnology Online Only

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Classify this structure.