A Problem with the Basic Oparin-Haldane Model for the Origin

question 9

Multiple Choice

A problem with the basic Oparin-Haldane model for the origin of life (though not necessarily an unsolvable one) is that ________.

• A) it does not explain the origin of chirality
• B) the early Earth is now not thought to have had a highly reducing atmosphere
• C) monomers have to be chemically activated before they will polymerize
• D) purine bases can attach to sugars in many equally probable ways
• E) All of the above.

---

Definitions:

7 to 14 Days

A general timeframe often associated with the incubation period of certain diseases, or the time required for particular biological processes to occur.

4 to 6 Weeks

A time frame often referred to in various contexts, indicating a period about one to one and a half months long.

1 Year

A period of 365 days (366 in a leap year), used as a standard unit of time to measure durations and ages.

Psychogenic Amnesia

A memory disorder characterized by sudden retrograde episodic memory loss, said to occur for a period of time ranging from hours to years due to psychological stress.