Question 1

The following are chemical functional groups that may be part of a biologically active molecule. Answer the question by
matching the items with the most appropriate group. ​
-The group on the carboxyl-terminal end of proteins
A)​-COOH
B)​-CH₃
C)​-NH₂
D)​-OH
E)​ 
F)​-PO43-
G)​-CHO

Accepted Answer

The carboxyl-terminal end of proteins contains a carboxyl group (-COOH). Therefore, the most appropriate group is A) -COOH.

Question 2

The following are basic building blocks of biopolymers. Match the building blocks with the statements below.​
-the basic unit of proteins
A)​amino acid
B)​glucose
C)​glycerol
D)​fatty acid
E)​nucleotide

Accepted Answer

Amino acids are the basic units of proteins.

Question 3

The following are chemical functional groups that may be part of a biologically active molecule. Answer the question by
matching the items with the most appropriate group. ​
-The group that is acidic
A)​-COOH
B)​-CH₃
C)​-NH₂
D)​-OH
E)​ 
F)​-PO43-
G)​-CHO

Accepted Answer

The -COOH group is a carboxylic acid functional group, which is an acidic group since it can donate protons (H⁺) in solution.

Question 4

The following are basic building blocks of biopolymers. Match the building blocks with the statements below.​
-the basic unit of RNA
A)​amino acid
B)​glucose
C)​glycerol
D)​fatty acid
E)​nucleotide

Accepted Answer

The basic unit of RNA is a nucleotide, which is composed of a sugar (often ribose), a phosphate group, and a nitrogenous base. Amino acids are the building blocks of proteins, glucose is a simple sugar used for energy, glycerol is a component of lipids, and fatty acids are the building blocks of lipids.

Question 5

Choose the one most appropriate item from its description.
-glucose
A)​a six-carbon sugar
B)​found in DNA and RNA
C)​principal components of cell membranes
D)​affect metabolic reaction rates

Accepted Answer

Glucose is a six-carbon sugar.

Question 6

The following are chemical functional groups that may be part of a biologically active molecule. Answer the question by
matching the items with the most appropriate group. ​
-The group typical of energy carriers such as ATP
A)​-COOH
B)​-CH₃
C)​-NH₂
D)​-OH
E)​ 
F)​-PO43-
G)​-CHO

Accepted Answer

The group typical of energy carriers such as ATP is -PO43-. ATP is composed of an adenosine molecule and three phosphate groups. The phosphate groups contain the -PO43- group, which is involved in high-energy bond formation and hydrolysis, making it an important energy carrier in cells.

Question 7

The following are chemical functional groups that may be part of a biologically active molecule. Answer the question by
matching the items with the most appropriate group. ​
-The hydroxyl group
A)​-COOH
B)​-CH₃
C)​-NH₂
D)​-OH
E)​ 
F)​-PO43-
G)​-CHO

Accepted Answer

The hydroxyl group is represented by the -OH functional group.

Question 8

Which molecule is incorrectly matched with its monomer?​
A) ​fat; fatty acid
B) ​starch; ribose
C) ​protein; amino acid
D) ​glycogen; glucose
E) nucleic acids; nucleotide​

Accepted Answer

Starch is a polysaccharide and is made up of glucose monomers, not ribose. Ribose is a monosaccharide and is a component of nucleotides.

Question 9

The following are chemical functional groups that may be part of a biologically active molecule. Answer the question by
matching the items with the most appropriate group. ​
-The aldehyde group in simple sugars
A)​-COOH
B)​-CH₃
C)​-NH₂
D)​-OH
E)​ 
F)​-PO43-
G)​-CHO

Accepted Answer

The aldehyde group is represented by -CHO, which is found in simple sugars such as glucose and fructose.

Question 10

The following are chemical functional groups that may be part of a biologically active molecule. Answer the question by
matching the items with the most appropriate group. ​
-The carboxyl group
A)​-COOH
B)​-CH₃
C)​-NH₂
D)​-OH
E)​ 
F)​-PO43-
G)​-CHO

Accepted Answer

The carboxyl group is -COOH, which is only represented by choice A.

Question 11

The following are chemical functional groups that may be part of a biologically active molecule. Answer the question by
matching the items with the most appropriate group. ​
-The group on the amino-terminal end of proteins
A)​-COOH
B)​-CH₃
C)​-NH₂
D)​-OH
E)​ 
F)​-PO43-
G)​-CHO

Accepted Answer

The amino-terminal end of proteins contains an amine group (-NH₂) which is represented by choice C.

Question 12

Choose the one most appropriate item from its description.
-enzymes​
A)​a six-carbon sugar
B)​found in DNA and RNA
C)​principal components of cell membranes
D)​affect metabolic reaction rates

Accepted Answer

Enzymes are known to affect metabolic reaction rates by lowering the activation energy needed for reactions to occur.

Question 13

Choose the one most appropriate item from its description.
-phospholipids
A)​a six-carbon sugar
B)​found in DNA and RNA
C)​principal components of cell membranes
D)​affect metabolic reaction rates

Accepted Answer

Phospholipids are the principal components of cell membranes. They form a bilayer that separates the internal environment of the cell from the external environment.

Question 14

The following are chemical functional groups that may be part of a biologically active molecule. Answer the question by
matching the items with the most appropriate group. ​
-The carbonyl group of simple sugars
A)​-COOH
B)​-CH₃
C)​-NH₂
D)​-OH
E)​ 
F)​-PO43-
G)​-CHO

Accepted Answer

The answer of  The following are chemical functional groups...

Question 15

Choose the one most appropriate item from its description.
-nucleotides
A)​a six-carbon sugar
B)​found in DNA and RNA
C)​principal components of cell membranes
D)​affect metabolic reaction rates

Accepted Answer

Nucleotides are the basic building blocks of DNA and RNA. Therefore, they are found in DNA and RNA.

Question 16

The following are basic building blocks of biopolymers. Match the building blocks with the statements below.​
-the basic unit of DNA
A)​amino acid
B)​glucose
C)​glycerol
D)​fatty acid
E)​nucleotide

Accepted Answer

Nucleotides are the basic building blocks of DNA, consisting of a sugar, phosphate group, and nitrogenous base. Amino acids make up proteins, glucose is a type of sugar commonly used for energy, glycerol is a component of lipids, and fatty acids are building blocks of lipids.

Question 17

The following are chemical functional groups that may be part of a biologically active molecule. Answer the question by
matching the items with the most appropriate group. ​
-The methyl group
A)​-COOH
B)​-CH₃
C)​-NH₂
D)​-OH
E)​ 
F)​-PO43-
G)​-CHO

Accepted Answer

The methyl group is -CH₃, which is option B.

Question 18

The following are chemical functional groups that may be part of a biologically active molecule. Answer the question by
matching the items with the most appropriate group. ​
-The amine group
A)​-COOH
B)​-CH₃
C)​-NH₂
D)​-OH
E)​ 
F)​-PO43-
G)​-CHO

Accepted Answer

The amine group is composed of a nitrogen atom bonded to two hydrogen atoms, which is represented as -NH₂.

Question 19

The following are chemical functional groups that may be part of a biologically active molecule. Answer the question by
matching the items with the most appropriate group. ​
-The group that makes lipid 'head's hydrophilic
A)​-COOH
B)​-CH₃
C)​-NH₂
D)​-OH
E)​ 
F)​-PO43-
G)​-CHO

Accepted Answer

The answer of  The following are chemical functional groups...

Question 20

The following are basic building blocks of biopolymers. Match the building blocks with the statements below.​
-the monomers of a polypeptide chain
A)​amino acid
B)​glucose
C)​glycerol
D)​fatty acid
E)​nucleotide

Accepted Answer

The monomers of a polypeptide chain are amino acids.

Answer: B 
 Glucose is a monomer of carbohydrates, not biopolymers.

Answer: C 
 Glycerol is a monomer of lipids, not biopolymers.

Answer: D 
 Fatty acids are monomers of lipids, not biopolymers.

Answer: E 
 Nucleotides are the monomers of nucleic acids, which are biopolymers.

Quiz 3: Molecules of Life

The following are chemical functional groups that may be part of a biologically active molecule. Answer the question by matching the items with the most appropriate group. -The group on the carboxyl-terminal end of proteins

The following are basic building blocks of biopolymers. Match the building blocks with the statements below. -the basic unit of proteins

The following are chemical functional groups that may be part of a biologically active molecule. Answer the question by matching the items with the most appropriate group. -The group that is acidic

The following are basic building blocks of biopolymers. Match the building blocks with the statements below. -the basic unit of RNA

Choose the one most appropriate item from its description. -glucose

The following are chemical functional groups that may be part of a biologically active molecule. Answer the question by matching the items with the most appropriate group. -The group typical of energy carriers such as ATP

The following are chemical functional groups that may be part of a biologically active molecule. Answer the question by matching the items with the most appropriate group. -The hydroxyl group

Which molecule is incorrectly matched with its monomer?

The following are chemical functional groups that may be part of a biologically active molecule. Answer the question by matching the items with the most appropriate group. -The aldehyde group in simple sugars

The following are chemical functional groups that may be part of a biologically active molecule. Answer the question by matching the items with the most appropriate group. -The carboxyl group

The following are chemical functional groups that may be part of a biologically active molecule. Answer the question by matching the items with the most appropriate group. -The group on the amino-terminal end of proteins

Choose the one most appropriate item from its description. -enzymes

Choose the one most appropriate item from its description. -phospholipids

The following are chemical functional groups that may be part of a biologically active molecule. Answer the question by matching the items with the most appropriate group. -The carbonyl group of simple sugars

Choose the one most appropriate item from its description. -nucleotides

The following are basic building blocks of biopolymers. Match the building blocks with the statements below. -the basic unit of DNA

The following are chemical functional groups that may be part of a biologically active molecule. Answer the question by matching the items with the most appropriate group. -The methyl group

The following are chemical functional groups that may be part of a biologically active molecule. Answer the question by matching the items with the most appropriate group. -The amine group

The following are chemical functional groups that may be part of a biologically active molecule. Answer the question by matching the items with the most appropriate group. -The group that makes lipid 'head's hydrophilic

The following are basic building blocks of biopolymers. Match the building blocks with the statements below. -the monomers of a polypeptide chain

Quiz 3: Molecules of Life

The following are chemical functional groups that may be part of a biologically active molecule. Answer the question by matching the items with the most appropriate group. ​ -The group on the carboxyl-terminal end of proteins

The following are basic building blocks of biopolymers. Match the building blocks with the statements below.​ -the basic unit of proteins

The following are chemical functional groups that may be part of a biologically active molecule. Answer the question by matching the items with the most appropriate group. ​ -The group that is acidic

The following are basic building blocks of biopolymers. Match the building blocks with the statements below.​ -the basic unit of RNA

Choose the one most appropriate item from its description. -glucose

The following are chemical functional groups that may be part of a biologically active molecule. Answer the question by matching the items with the most appropriate group. ​ -The group typical of energy carriers such as ATP

The following are chemical functional groups that may be part of a biologically active molecule. Answer the question by matching the items with the most appropriate group. ​ -The hydroxyl group

Which molecule is incorrectly matched with its monomer?​

The following are chemical functional groups that may be part of a biologically active molecule. Answer the question by matching the items with the most appropriate group. ​ -The aldehyde group in simple sugars

The following are chemical functional groups that may be part of a biologically active molecule. Answer the question by matching the items with the most appropriate group. ​ -The carboxyl group

The following are chemical functional groups that may be part of a biologically active molecule. Answer the question by matching the items with the most appropriate group. ​ -The group on the amino-terminal end of proteins

Choose the one most appropriate item from its description. -enzymes​