UNCW Biology 201 Final Exam
Questions & Answers With Complete
Solutions Graded A+
QUESTIONS AND ANSWERS
What are the three domains of life? ANSWER -Bacteria, archea, and eukaryotes
What is the main difference between bacteria and archea ANSWER -both are
prokaryotes, but bacteria's cell walls contain peptidoglycan and archea have
membranes composed of phospholipids.
What is the strongest bond? ANSWER -Covalent bonds
What is the weakest bond? ANSWER -Hydrogen bonds, but collectively hydrogen
bonds are extremely strong
What four properties does hydrogen bonding give water? ANSWER -1. Cohesion
and adhesion
2. Solid is less dense than liquid
3. High specific heat
3. Universal solvent of life
Cohesion ANSWER -The hydrogen bonds between linking water molecules gives
them the ability to stick to themselves.
,Adhesion ANSWER -The ability for molecules to stick to surfaces.
How do hydrogen bonds allow ice to float? ANSWER -Hydrogen bonds in ice are
"more ordered" than in the liquid form of water, making ice less dense than the liquid.
Is water polar or non-polar? ANSWER -Polar
Hydrocarbons ANSWER -Organic molecules consisting of only carbon and
hydrogen.
What are the 7 functional groups? ANSWER -1. Carboxyl Group
2. Carbonyl Group
3. Hydroxyl Group
4. Amino Group
5. Sulfhydryl Group
6. Phosphate Group
7. Methyl Group
Monomers build polymers through... ANSWER -dehydration reactions
Condensation (Dehydration) Reactions ANSWER -When two molecules are linked
through the removal of a water molecule.
, Polymers are disassembled into monomers by.... ANSWER -hydrolysis
Hydrolysis ANSWER -The reverse of a dehydration reaction, a water molecule is
added to a polymer to separate the monomers.
What are the four classes of macromolecules? ANSWER -1. Carbohydrates
2. Proteins
3. Nucleic Acids
4. Lipids
Lipids consist of... ANSWER -fats, phospholipids and steroids
Fats are composed of the two smaller molecules.... ANSWER -glycerol and fatty acids
Structure of glycerol ANSWER -A three-carbon alcohol with a hydroxyl group
linked to each carbon
Structure of fatty acids ANSWER -Consists of a carboxyl group attached to a large
carbon skeleton
Cyclin ANSWER -Cellular protein that play an important role in regulating the cell
cycle.
Questions & Answers With Complete
Solutions Graded A+
QUESTIONS AND ANSWERS
What are the three domains of life? ANSWER -Bacteria, archea, and eukaryotes
What is the main difference between bacteria and archea ANSWER -both are
prokaryotes, but bacteria's cell walls contain peptidoglycan and archea have
membranes composed of phospholipids.
What is the strongest bond? ANSWER -Covalent bonds
What is the weakest bond? ANSWER -Hydrogen bonds, but collectively hydrogen
bonds are extremely strong
What four properties does hydrogen bonding give water? ANSWER -1. Cohesion
and adhesion
2. Solid is less dense than liquid
3. High specific heat
3. Universal solvent of life
Cohesion ANSWER -The hydrogen bonds between linking water molecules gives
them the ability to stick to themselves.
,Adhesion ANSWER -The ability for molecules to stick to surfaces.
How do hydrogen bonds allow ice to float? ANSWER -Hydrogen bonds in ice are
"more ordered" than in the liquid form of water, making ice less dense than the liquid.
Is water polar or non-polar? ANSWER -Polar
Hydrocarbons ANSWER -Organic molecules consisting of only carbon and
hydrogen.
What are the 7 functional groups? ANSWER -1. Carboxyl Group
2. Carbonyl Group
3. Hydroxyl Group
4. Amino Group
5. Sulfhydryl Group
6. Phosphate Group
7. Methyl Group
Monomers build polymers through... ANSWER -dehydration reactions
Condensation (Dehydration) Reactions ANSWER -When two molecules are linked
through the removal of a water molecule.
, Polymers are disassembled into monomers by.... ANSWER -hydrolysis
Hydrolysis ANSWER -The reverse of a dehydration reaction, a water molecule is
added to a polymer to separate the monomers.
What are the four classes of macromolecules? ANSWER -1. Carbohydrates
2. Proteins
3. Nucleic Acids
4. Lipids
Lipids consist of... ANSWER -fats, phospholipids and steroids
Fats are composed of the two smaller molecules.... ANSWER -glycerol and fatty acids
Structure of glycerol ANSWER -A three-carbon alcohol with a hydroxyl group
linked to each carbon
Structure of fatty acids ANSWER -Consists of a carboxyl group attached to a large
carbon skeleton
Cyclin ANSWER -Cellular protein that play an important role in regulating the cell
cycle.
