MT1

Question 1

Why are polar molecules and ions ready to dissolve in water so easily and not polar uncharged molecules?

Answer 1

• Polar molecules can hydrogen bond with H2O.

- Have chemical means to interact with H2O.

Question 2

List and describe the building blocks of cells along with their larger units. Give an example of each of you can.

Answer 2

1) Amino Acids
2) Nucleotides/Nucleic Acids
3) Fatty Acids
4) Sugars/Monosaccharides

Question 3

Amino Acids

Answer 3

• Proteins

* (Kinase,Lactase)

Question 4

Nucleotides

Answer 4

• Nucleic Acids

* (DNA/RNA)

Question 5

Sugars/Monosaccharides

Answer 5

• Polysaccharides

* (Glucose,Sucrose)

Question 6

Fatty Acids

Answer 6

• Lipids/Fats/Membranes

* (triglycerides,phospholipids,cholesterol)

Question 7

How are macromolecules formed and destroyed?

Answer 7

Condensation reaction

Question 8

Name some chemical bonds important in the biochemical world.

Answer 8

1) Covalent
2) Ionic/Polar/Electrostatic
3) Hydrogen Bonding
4) VW Forces

Question 9

Covalent Bond

Answer 9

• Strongest bond
• EQUAL sharing of electrons
• Actual formation of physical Bond

Question 10

Ionic/Polar/Electrostatic Reactions

Answer 10

• Are possible because of charges of elements.
• One will be positive and one will be negative
• No physical bond present
• Unequal sharing of electrons

Question 11

Hydrogen bonds

Answer 11

• Alone, very weak

- But in large groups very strong

Question 12

VW Forces

Answer 12

• Small dipole moments that occur in molecules at all times

- Can assume they are always present in any molecule!!

Question 13

Hydrophobic interactions

Answer 13

-Events that occur when hydrophobic molecules are surrounded by unaquious polar solutions so that they can avoid contact with solution

Question 14

Water polar molecules

Answer 14

• Forms H2O bonds
• Bonds with polar molecules
• H2O does not bind well with hydrophobic