Question 1

Circle the glycosidinc linkage(s) in the following polysaccharide.

Accepted Answer

The answer of Circle the glycosidinc linkage(s) in the following...

Question 2

Which of the following triglycerides would you most expect to be a liquid at room temperature?

Accepted Answer

A) saturated fat 
B) trans monounsaturated fat 
C) trans polyunsaturated fat 
D) cis monounsaturated fat 
E) cis polyunsaturated fat 
A) saturated fat 
B) trans monounsaturated fat 
C) trans polyunsaturated fat 
D) cis monounsaturated fat 
E) cis polyunsaturated fat

Question 3

At a physiological pH of 7.4, amino acids exist as zwitterions. At a very low pH (in an acid solution), both the amine group and the carboxylic acid group on an amino acid are protonated. Which acid group is the stronger acid?

Accepted Answer

A) (F1F1F1S1F1F1F10NH2) 
B) (F1F1F1S1F1F1F10NH3F1F1F1S1F1F1F10) 
C) (F1F1F1S1F1F1F10COOH) 
D) (F1F1F1S1F1F1F10COOF1F1F1S1F1F1F10 
E) (F1F1F1S1F1F1F10H3OF1F1F1S1F1F1F10) 
A) (F1F1F1S1F1F1F10NH2) 
B) (F1F1F1S1F1F1F10NH3F1F1F1S1F1F1F10) 
C) (F1F1F1S1F1F1F10COOH) 
D) (F1F1F1S1F1F1F10COOF1F1F1S1F1F1F10 
E) (F1F1F1S1F1F1F10H3OF1F1F1S1F1F1F10)

Question 4

Consider the 1,2-dichloro derivative of ethylene, in which one of the hydrogen atoms on each of the carbon atoms in ethylene is substituted with a chlorine atom, giving the condensed structure CHClCHCl. Which of the following is true?

Accepted Answer

A) The cis isomer is more polar. 
B) The trans isomer is more polar. 
C) Neither cis nor trans isomers are polar. 
D) Both cis and trans isomers are equally polar. 
E) There are no isomers for this molecule. 
A) The cis isomer is more polar. 
B) The trans isomer is more polar. 
C) Neither cis nor trans isomers are polar. 
D) Both cis and trans isomers are equally polar. 
E) There are no isomers for this molecule.

Question 5

Isomers that cannot be superimposed on their mirror images are called ________

Accepted Answer

A) geometric isomers. 
B) structural isomers. 
C) enantiomers. 
D) isotopes. 
E) constitutional isomers. 
A) geometric isomers. 
B) structural isomers. 
C) enantiomers. 
D) isotopes. 
E) constitutional isomers.

Question 6

The molecule drawn below is an example of ________

Accepted Answer

A) a nucleic acid base. 
B) an amino acid. 
C) a carbohydrate. 
D) a fatty acid. 
E) a lipid. 
A) a nucleic acid base. 
B) an amino acid. 
C) a carbohydrate. 
D) a fatty acid. 
E) a lipid.

Question 7

Which structure contains the ester functional group?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 8

At a physiological pH of 7.4, amino acids exist as zwitterions because the pKa of the -NH3F1F1F1S1F1F1F10 group is ________ 7.4, and the pKa of the F1F1F1S1F1F1F10COOH group is ________ 7.4.

Accepted Answer

A) greater than; less than 
B) less than; greater than 
C) greater than; greater than 
D) less than; less than 
E) equal to; equal to 
A) greater than; less than 
B) less than; greater than 
C) greater than; greater than 
D) less than; less than 
E) equal to; equal to

Question 9

Which of the following is not a potential function of a protein?

Accepted Answer

A) signaling molecule 
B) transport 
C) enzyme catalyst 
D) structural unit 
E) all of the above are protein functions 
A) signaling molecule 
B) transport 
C) enzyme catalyst 
D) structural unit 
E) all of the above are protein functions

Question 10

Which base is not present in RNA?

Accepted Answer

A) adenine 
B) cytosine 
C) guanine 
D) thymine 
E) uracil 
A) adenine 
B) cytosine 
C) guanine 
D) thymine 
E) uracil

Question 11

Describe what is meant by the four levels of protein structure: primary, secondary, tertiary, and quaternary.

Accepted Answer

The primary structure refers to the line

Question 12

To produce ethanol from corn (i.e., starch) to use as fuel or drink, the starch first must be decomposed to glucose through a process called ________

Accepted Answer

A) fermentation. 
B) distillation. 
C) hydrolysis. 
D) combustion. 
E) oxidation. 
A) fermentation. 
B) distillation. 
C) hydrolysis. 
D) combustion. 
E) oxidation.

Question 13

Draw a triglyceride and label its major components.

Accepted Answer

The answer of Draw a triglyceride and label its major...

Question 14

Naproxen has the chemical structure shown below. Which of the noted functional groups are found in the molecule?

Accepted Answer

A) only an ether 
B) both an ester and a carboxylic acid 
C) both an ether and a carboxylic acid 
D) only an ester 
E) both an ether and an ester 
A) only an ether 
B) both an ester and a carboxylic acid 
C) both an ether and a carboxylic acid 
D) only an ester 
E) both an ether and an ester

Question 15

How many different nucleic acid bases are found altogether in the nucleic acids DNA and RNA?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) 5 
A) 1 
B) 2 
C) 3 
D) 4 
E) 5

Question 16

What are the three units in a nucleotide?

Accepted Answer

a base, a

Question 17

Which one of the following molecules is chiral?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 18

The primary structure of a protein is ________

Accepted Answer

A) the sequence of amino acids in the protein. 
B) the F1F1F1S1F1F1F10-helix structure of the protein. 
C) the F1F1F1S1F1F1F10-pleated sheet structure of the protein. 
D) a list of the amino acids in the protein along with the number of times each occurs. 
E) the arrangement of F1F1F1S1F1F1F10-helices and F1F1F1S1F1F1F10-pleated sheets in the protein. 
A) the sequence of amino acids in the protein. 
B) the F1F1F1S1F1F1F10-helix structure of the protein. 
C) the F1F1F1S1F1F1F10-pleated sheet structure of the protein. 
D) a list of the amino acids in the protein along with the number of times each occurs. 
E) the arrangement of F1F1F1S1F1F1F10-helices and F1F1F1S1F1F1F10-pleated sheets in the protein.

Question 19

Write the reaction that occurs between sucrose and water and identify the reaction type.

Accepted Answer

@#IMG-DLM& This is a

Question 20

Aspartame exists as a zwitterion with a ________ amine group and a ________ carboxylic acid group.

Accepted Answer

A) deprotonated; protonated 
B) protonated; deprotonated 
C) protonated; protonated 
D) deprotonated; deprotonated 
E) functionalized; defunctionalized 
A) deprotonated; protonated 
B) protonated; deprotonated 
C) protonated; protonated 
D) deprotonated; deprotonated 
E) functionalized; defunctionalized

Exam 20: Organic and Biological Molecules: the Compounds of Life

Circle the glycosidinc linkage(s) in the following polysaccharide.

Which of the following triglycerides would you most expect to be a liquid at room temperature?

At a physiological pH of 7.4, amino acids exist as zwitterions. At a very low pH (in an acid solution), both the amine group and the carboxylic acid group on an amino acid are protonated. Which acid group is the stronger acid?

Consider the 1,2-dichloro derivative of ethylene, in which one of the hydrogen atoms on each of the carbon atoms in ethylene is substituted with a chlorine atom, giving the condensed structure CHClCHCl. Which of the following is true?

Isomers that cannot be superimposed on their mirror images are called ________

The molecule drawn below is an example of ________

Which structure contains the ester functional group?

At a physiological pH of 7.4, amino acids exist as zwitterions because the pKa of the -NH3 group is ________ 7.4, and the pKa of the COOH group is ________ 7.4.

Which of the following is not a potential function of a protein?

Which base is not present in RNA?

Describe what is meant by the four levels of protein structure: primary, secondary, tertiary, and quaternary.

To produce ethanol from corn (i.e., starch) to use as fuel or drink, the starch first must be decomposed to glucose through a process called ________

Draw a triglyceride and label its major components.

Naproxen has the chemical structure shown below. Which of the noted functional groups are found in the molecule?

How many different nucleic acid bases are found altogether in the nucleic acids DNA and RNA?

What are the three units in a nucleotide?

Which one of the following molecules is chiral?

The primary structure of a protein is ________

Write the reaction that occurs between sucrose and water and identify the reaction type.

Aspartame exists as a zwitterion with a ________ amine group and a ________ carboxylic acid group.

Matter and Energy: The Origin of the Universe

Atoms, Ions, and Molecules: Matter Starts Here

Stoichiometry: Mass, Formulas, and Reactions

Solution Chemistry: The Hydrosphere

Thermochemistry: Energy Changes in Reactions

Properties of Gases: The Air We Breathe

A Quantum Model of Atoms: Waves and Particles

Chemical Bonds: What Makes a Gas a Greenhouse Gas

Molecular Geometry: Shape Determines Function

Intermolecular Forces: The Uniqueness of Water

Solutions: Properties and Behavior

Solids: Crystals, Alloys, and Polymers

Chemical Kinetics: Reactions in the Atmosphere

Chemical Equilibrium: How Much Product Does a Reaction Really Make

Acidbase Equilibria: Proton Transfer in Biological Systems

Additional Aqueous Equilibria: Chemistry and the Oceans

Thermodynamics: Spontaneous and Nonspontaneous Reactions and Processes

Electrochemistry: The Quest for Clean Energy

Nuclear Chemistry: Applications to Energy and Medicine

The Main Group Elements: Life and the Periodic Table

Transition Metals: Biological and Medical Applications

Filters

At a physiological pH of 7.4, amino acids exist as zwitterions because the pK_a of the -NH₃^ group is ________ 7.4, and the pK_a of the COOH group is ________ 7.4.

Aspartame exists as a zwitterion with a amine group and a carboxylic acid group.