Topic 3.3: Cellular Energy

What is a fundamental requirement for all living systems to maintain order?

A constant input of energy.

What must the relationship be between energy input and energy loss?

Energy input must exceed energy loss to maintain order and power processes.

How do cells manage processes that require energy?

By coupling them with cellular processes that release energy.

What is the biological result of a significant loss of order or energy flow?

Death.

Why are metabolic pathways sequential rather than single-step?

To allow for a more controlled transfer of energy.

What is the typical relationship between products and reactants in a metabolic pathway?

The product of one reaction is typically the reactant for the next step.

Which metabolic pathways are conserved across all three domains of life?

Glycolysis and oxidative phosphorylation.