Which of the Following Has Not Yet Been Synthesized in Laboratory

question 18

Multiple Choice

Which of the following has not yet been synthesized in laboratory experiments studying the origin of life?

• A)liposomes
• B)liposomes with selectively permeable membranes
• C)oligopeptides and other oligomers
• D)protobionts that use DNA to program protein synthesis
• E)amino acids

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Definitions:

Mesoderm

The middle layer of an embryo in early development, which gives rise to muscles, bones, and the circulatory system among other structures.

Ectoderm

The outermost layer of cells or tissue of an embryo, giving rise to the outer skin layer, nervous system, and various sensory organs.

Endoderm

The innermost layer of cells or tissues of an embryo in early development, or the lining of the digestive and respiratory tracts in the mature organism.

Jellylike Matrix

A viscous, gelatinous substance that provides structural support and medium for cell components in various tissues, including the extracellular matrix of connective tissue.