Steps in the Origin of Cells CFU

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Answer the questions below to the best of your ability.

Step 1 in the Oparin-Haldane hypothesis regarding the spontaneous origin of cells is the formation of simple organic monomers. Of the following, check off which ones are monomers. *

4 points

Proteins

Simple Sugars

Fatty Acids

Phospholipids

DNA

RNA

Nitrogenous Bases

Amino Acids

Required

Step 2 of the Oparin-Haldane hypothesis regarding the spontaneous origin of cells is polymerization. Each row has a monomer; check off in each column what its polymer would be (you may need to look this up if you don't remember from general biology). *

5 points

DNA

Polysaccharides (starch)

Proteins

RNA

Triglyceride

Simple Sugars (glucose)

Amino Acids

Nucleotide

Fatty Acids

Step 3 of the Oparin-Haldane hypothesis regarding the spontaneous origin of cells is the creation of a self-replicating polymer. In this hypothesis, RNA is considered to have come before DNA as a self-replicating molecule. What can RNA do, that DNA cannot (pick all that apply) *

3 points

Store genetic information

Replicate genetic information without the help of proteins

Catalyze reactions

Exist as a single strand of nucleotides

Use complementary base pairing to exist as a double strand of nucleotides

Required

Step 4 of the Oparin-Haldane hypothesis regarding the spontaneous origin of cells deals with the formation of a membrane around the self-replicating molecule, creating an internal chemistry different than the surroundings. Why are fatty acids necessary to make these membranes?

1 point

Fatty acids have both hydrophilic and hydrophobic ends to them, allowing for the formation of micelles

Fatty acids readily come together and break apart in water, allowing for the formation of vesicles

Fatty acids can catalyze anabolic reactions, driving the formation of a bilayer

Fatty acids can bind laterally with other fatty acids, allowing the formation of a sheet or membrane.

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