The E Coli Cell Is 2 m Long and 1

question 59

Essay

The E. coli cell is 2 m long and 1 m in diameter, while a typical eukaryotic cell is 20 m in diameter. Assuming that the E. coli cell is a perfect cylinder and the eukaryotic cell is a perfect sphere, calculate the surface-to-volume ratio for each cell type [cylinder volume V = r²h; cylinder area A = 2r² + 2rh; sphere volume V = 4/3(r³); sphere area 4r²].What do these numbers tell you about the evolutionary changes that would have to occur to generate an efficient eukaryotic cell considering that most biochemical processes depend on membrane-bound processes.

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Definitions:

Private Speech

Self-directed speech that individuals, especially children, use to guide their own actions and thoughts, playing a key role in cognitive development according to Vygotsky.

Imaginary Audience

A psychological concept where an individual believes that his or her behavior is constantly being watched and judged by others, often seen in adolescence.

Adolescent Egocentrism

A characteristic of adolescence involving difficulty distinguishing between one's own perspective and someone else's perspective.

Naive Idealism

A worldview characterized by the belief in a perfect or ideal scenario, often without considering practical limitations or the complexity of real situations.