Biology
Biology
12th Edition
ISBN: 9780078024269
Author: Sylvia Mader, Michael Windelspecht
Publisher: McGraw-Hill Education
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Chapter 18, Problem 1A
Summary Introduction

Introduction:

The origin of life includes various hypothesis like the Primordial soup hypothesis which included the mixing of various substances like methane, urea, ammonia and water, which combine to form amino acids in the liquid broth mixture when stimulated by an electric discharge.

1)

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Answer to Problem 1A

Correct answer:

Polymers evolve; the heat of the sun could have caused the amino acids to form proteinoids.

The stimulatory effect of sunlight causes formation of polymers of polypeptides leading to the origin of life.

Here, option (c) is the correct answer.

Explanation of Solution

The protein first hypothesis involves the formation of the protein polypeptides which form microspheres, due to stimulatory action of sunlight. Small proteinoids are formed from polypeptides polymers, which combine to form the microspheres. This gives the protein molecule an added selection advantage over previous metabolites in the cell.

2)

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