The Molecule Cytochrome C Supports the Theory of Evolution as Biochemical

question 34

Multiple Choice

The molecule cytochrome c supports the theory of evolution as biochemical evidence. Which of the following is not part of that evidence?

• A) Cytochrome c has evolved multiple times among many species.
• B) Cytochrome c has the same function in all organisms.
• C) The genetic code for cytochrome c differs among species.
• D) Cytochrome c is found in a variety of organisms from yeast to humans.
• E) Cytochrome c plays a role critical to survival. Cytochrome c sequence comparisons show evolution in that this molecule has a common function important for cellular metabolism and it is present in many species but is variable among them. This pattern illustrates that cytochrome c evolved once in an ancestor and was passed to all of its descendents with modification through time unique to each species.

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Definitions:

Alpha-Helical

Pertaining to the alpha-helix structure, a type of secondary structure of proteins, characterized by a right-handed coil.

Beta-Pleated Sheet

A type of secondary structure found in proteins wherein the backbone is extended into a zigzag shape and strands are connected by hydrogen bonds.

Proteins

Large biomolecules consisting of one or more long chains of amino acid residues, crucial for the structure and function of living cells.

Amino Acids

Organic compounds containing an amine group, a carboxylic acid group, and a side chain that varies between different amino acids, essential for protein synthesis.