Bio 5.3 & 5.4 Quiz

The first organic molecules were probably very simple carbon-based molecules made of a few atoms.

• False

• True

RNA may have been the first organic molecule to evolve and early life may have been based on RNA, rather than DNA or protein. This is known as the RNA world hypothesis.

• True

• False

Inorganic chemicals are the basis for most life processes.

• True

• False

What natural phenomenon probably sparked the beginning of life?

• Hurricanes

• Floods

• Lightning

• Thunder

The organic compounds that evolved on Earth and were required for the origin of life were:

• Urea and amino acids

• Urea and nucleic acids

• Proteins and amino acids

• Proteins and nucleic acids (such as DNA or RNA)

Organisms that make their own food are called what?

• Consumers

• Autotrophs

• Heterotrophs

The last universal common ancestor (LUCA) probably multiplied by duplicating all of its cellular contents, followed by cellular division.

• False

• True

Cells contain genetic material.

• True

• False

What process probably evolved about 3 billion years ago?

• Cellular respiration

• Catalysis

• Photosynthesis

• LUCA

The first cells could be described as very simple prokaryotic-like cells.

• True

• False