Question 1

Match the molecules below with their functions.

-Main storage carbohydrate in plants

Accepted Answer

A) Glycogen 
B) Cellulose 
C) Starch 
D) Phospholipid 
E) Wax
F)Steroid
G)Cholesterol
H)DNA
I)RNA

Question 2

Match the molecules below with their functions.

-Waterproofs biological structures

Accepted Answer

A) Glycogen 
B) Cellulose 
C) Starch 
D) Phospholipid 
E) Wax
F)Steroid
G)Cholesterol
H)DNA
I)RNA

Question 3

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

Accepted Answer

A) -COOH 
B) -CH3 
C) -NH2 
D) -OH 
E) 
F)-PO4-
G)-CHO

Question 4

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

Accepted Answer

A) -COOH 
B) -CH3 
C) -NH2 
D) -OH 
E) 
F)-PO4-
G)-CHO

Question 5

Classification. The following are basic building blocks of biopolymers. Match the building blocks with the statements below.
 
-The hydrophobic component of a type of lipid

Accepted Answer

A) Amino acid 
B) Glucose 
C) Carboxyl head 
D) Fatty acid tail 
E) Nucleotide

Question 6

The order of amino acids is the ____ structure of proteins.

Accepted Answer

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

Question 7

Classification. The following are chemical functional groups that may be part of a biologically active molecule. Answer the questions by matching the items with the most appropriate group.
-Found in alcohols and sugars

Accepted Answer

A) -COOH 
B) -CH3 
C) -NH2 
D) -OH 
E) 
F)-PO4-
G)-CHO

Question 8

Polysaccharides ____.

Accepted Answer

A)  are composed of three linked monosaccharides 
B)  contain only straight monomer chains 
C)  are always made of glucose molecules 
D)  may be insoluble and difficult to break down 
E)  are formed by cleavage reactions

Question 9

A(n)_____________________ is a term given to a macromolecule (large molecule)made up of individual subunits.

Accepted Answer

The answer of A(n)_____________________ is a term given to a...

Question 10

_______,the simplest hydrocarbon,is one carbon atom bonded to four hydrogen atoms.

Accepted Answer

A)  Ketone 
B)  Methane 
C)  Amine 
D)  Phosphate 
E)  Carboxyl

Question 11

Simple sugar converts from a straight-chain into a ring form when the __________ group combines with a hydroxyl group.

Accepted Answer

A)  aldehyde 
B)  sulfhydryl 
C)  amine 
D)  carbonyl 
E)  methyl

Question 12

In triglycerides,the ____ loses its ______when its ___group reacts with glycerol.

Accepted Answer

A)  carboxyl; hydrophobicity; fatty acid 
B)  glucose; polarity; carbonyl 
C)  amino acid; pH; amine 
D)  fatty acid; hydrophilicity; carboxyl 
E)  amino acids

Question 13

What is the main function of the molecule shown in the figure above?

Accepted Answer

A)  Chemical messenger 
B)  Energy currency 
C)  Hereditary information 
D)  Metabolism of fats 
E)  Protein synthesis

Question 14

Polyunsaturated fats ____.

Accepted Answer

A)  have fewer hydrogen atoms than do saturated fats 
B)  are more characteristic of animal fats than plant fats 
C)  have no double bonds 
D)  are solid at room temperature 
E)  are gas at room temperature

Question 15

What type of molecule is shown in the accompanying figure?

Accepted Answer

A)  Saturated fatty acid 
B)  Unsaturated fatty acid 
C)  Triglyceride 
D)  Wax 
E)  Steroid

Question 16

An -OH group is a(n)____ group.

Accepted Answer

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

Question 17

Although carbon dioxide contains carbon,it is not considered an "organic" compound because ____.

Accepted Answer

A)  it is not found in the earth's crust 
B)  it is not present in living cells 
C)  the carbon atom is not bonded to at least one hydrogen atom 
D)  the carbons are not in chains or rings 
E)  it is too small

Question 18

Classification. The following are basic building blocks of biopolymers. Match the building blocks with the statements below.
 
-The hydrophilic component of a type of lipid

Accepted Answer

A) Amino acid 
B) Glucose 
C) Carboxyl head 
D) Fatty acid tail 
E) Nucleotide

Question 19

Figure 3.20
 
-The figure above shows all of the following components except:

Accepted Answer

A)  ribose 
B)  deoxyribose 
C)  triphosphate 
D)  adenosine 
E)  amine

Question 20

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

Accepted Answer

A) -COOH 
B) -CH3 
C) -NH2 
D) -OH 
E) 
F)-PO4-
G)-CHO

Exam 3: Molecules of Life

Match the molecules below with their functions. -Main storage carbohydrate in plants

Match the molecules below with their functions. -Waterproofs biological structures

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

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

Classification. The following are basic building blocks of biopolymers. Match the building blocks with the statements below. -The hydrophobic component of a type of lipid

The order of amino acids is the ____ structure of proteins.

Classification. The following are chemical functional groups that may be part of a biologically active molecule. Answer the questions by matching the items with the most appropriate group. -Found in alcohols and sugars

Polysaccharides ____.

A(n)_____________________ is a term given to a macromolecule (large molecule)made up of individual subunits.

_______,the simplest hydrocarbon,is one carbon atom bonded to four hydrogen atoms.

Simple sugar converts from a straight-chain into a ring form when the __________ group combines with a hydroxyl group.

In triglycerides,the loses its when its _group reacts with glycerol.

What is the main function of the molecule shown in the figure above?

Polyunsaturated fats ____.

What type of molecule is shown in the accompanying figure?

An -OH group is a(n) ____ group.

Although carbon dioxide contains carbon,it is not considered an "organic" compound because ____.

Classification. The following are basic building blocks of biopolymers. Match the building blocks with the statements below. -The hydrophilic component of a type of lipid

Figure 3.20 -The figure above shows all of the following components except:

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