DNA Structure

Structure: Double Helix; two strands of DNA wound around each other.

• DNA Base Sequence
  • A & T
  • G & C
    • Determines Amino Acid sequence in Protein.

Biological Chemicals

Fats / Lipids

• Carbon, Oxygen, and Hydrogen (COH)

Carbohydrates

• Carbon, Oxygen, and Hydrogen (COH)
• Long chains of simple sugars.

Proteins

• Carbon, Oxygen, Hydrogen, and Nitrogen (COHN)
• Long chains of Amino Acids
• Forms structures and enzymes

Chemical Tests

1. Benedict’s Solution

Glucose (Reducing Sugar) Present

1. After Benedicts, add heat.
2. Blue → brick red or orange

4. Iodine Solution

Starch Present

1. orange-brown → blue-black

2. Biuret Test

Protein Present

1. blue → violet

3. DCPIP Test

Vitamin C Present

1. blue → colourless

5. Ethanol Emulsion Test

Lipids Present