The Mutation Accumulation Hypothesis for the Evolution of Senescence Proposes

question 2

Multiple Choice

The mutation accumulation hypothesis for the evolution of senescence proposes that for late-life traits, selection cannot purge deleterious mutations. What assumptions does this hypothesis make?

• A) Population sizes are very large and mutations have small fitness effects.
• B) Population sizes are finite and mutations have small fitness effects
• C) Population sizes are finite and mutations have large fitness effects,
• D) Population sizes are very large and mutations have small fitness effects..

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Definitions:

ATP

See adenosine triphosphate.

Cysteine Residues

The amino acid units in proteins that contain a thiol group, often involved in the formation of disulfide bonds that stabilize protein structure.

Tertiary Structure

The three-dimensional shape of a protein molecule formed by bends and folds of its polypeptide chain.

Sulfhydryl

A functional group with the structure R-SH, where R is an organic alkyl or aryl group and SH denotes a sulfur atom bonded to a hydrogen atom, important in protein structure.