Which of the Following Steps Has Not Yet Been Accomplished

question 42

Multiple Choice

Which of the following steps has not yet been accomplished by scientists studying the origin of life?

• A) synthesis of small RNA polymers by ribozymes
• B) abiotic synthesis of polypeptides
• C) formation of molecular aggregates with selectively permeable membranes
• D) formation of protocells that use DNA to direct the polymerization of amino acids
• E) abiotic synthesis of organic molecules

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Definitions:

Diaschisis

Neural shock that follows brain damage in which areas connected to the site of damage show a temporary arrest of function.

Traumatic Brain Injury

Traumatic brain injury is a form of acquired brain injury resulting from sudden trauma causing damage to the brain, which can lead to temporary or permanent cognitive, physical, and psychosocial effects.

Epileptic Seizure

A transient occurrence of signs and/or symptoms due to abnormal excessive or synchronous neuronal activity in the brain.

Traumatic Brain Injury

Physical damage to the brain tissue following a blow, jolt, or disruption to the head that affects brain function.