Biomolecules Test 1 Flashcards Preview

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Flashcards in Biomolecules Test 1 Deck (10):
1

Why are water molecules cohesive?

The form hydrogen bonds to create surface tension.

2

Which biological molecule contains genetic information?

Nucleic acids.

3

How does DNA carry genetic information?

Sequence of bases.

4

What two classes of organic compounds typically provide energy for living systems?

Fats and amino acids.

5

Summarize the relationship between hydration reactions and hydrolysis.

Dehydration reactions assemble polymers and hydrolysis breaks them down.

6

Positive Biuret Test

Protein = Purple

7

Positive Iodine

Starch = Orange

8

Positive Benedict's

Reduced Sugars = Blue, reddish yellow or orange

9

Positive Sudan Red

Lipids = Red Spots

10

Proteins
Function:
Examples:
Linkage
Overall structure

Enzymes
ATPase, peroxidase, enxymes of Calvin cycle.
Monomer unit: amino acid
Linkage: peptide bond: N-C bond between amino acids
Four Levels of Protein Structure:
Primary - The sequence of covalently linked amino acids
Secondary - chain of amino acids folds into a helix or sheet
Tertiary - secondary elements fold into overall sheet
Quartenary - multiple peptide chains bind together