Question 1

When Urey and Miller completed their experiment they found ______ in their mixture.&#10;A) DNA&#10;B) RNA&#10;C) proteinoids&#10;D) ATP

Accepted Answer

Urey and Miller's experiment resulted in the formation of proteinoids, which are simple proteins, by simulating early Earth conditions. They did not find DNA, RNA, or ATP in their mixture.

Question 2

This cell does not contain a nucleus:&#10;A) eukaryote&#10;B) prokaryote&#10;C) DNA&#10;D) protein

Accepted Answer

Prokaryotes, such as bacteria, are characterized by the absence of a nucleus, distinguishing them from eukaryotes, which have a nucleus enclosing their DNA.

Question 3

The idea that life and Earth are symbiotic is called ________.&#10;A) DNA hypothesis&#10;B) RNA hypothesis&#10;C) Proteinoid hypothesis&#10;D) Gaia hypothesis

Accepted Answer

The Gaia hypothesis proposes that life and Earth are symbiotic, suggesting that living organisms interact with their inorganic surroundings on Earth to form a self-regulating, complex system that helps to maintain and perpetuate the conditions for life on the planet.

Question 4

These simple creatures are probably closest in form to the original species on Earth.&#10;A) bacteria&#10;B) eukaryotes&#10;C) archaea&#10;D) cyanobacteria

Accepted Answer

The answer of These simple creatures are probably closest in...

Question 5

This experiment created amino acids in the laboratory: _________________.

Accepted Answer

The answer of This experiment created amino acids in the...

Question 6

About _______ amino acids make up all life on Earth.

Accepted Answer

The answer of About _______ amino acids make up all...

Question 7

Genetic code is passed on by proteins.

Accepted Answer

Genetic code is passed on by DNA (deoxyribonucleic acid), not proteins. DNA contains the instructions needed to build and maintain an organism.

Question 8

Bluegreen bacteria are called cyanobacteria.

Accepted Answer

Cyanobacteria are often referred to as blue-green algae or blue-green bacteria due to their color and their ability to photosynthesize, similar to plants.

Deck 85: Astrobiology