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1
Q

2nd law of thermodynamics

A

The amount of useful energy decreases when energy is converted from one form to another.

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2
Q

four ways cells regulate mataboism

A
  1. Regulate enzyme availability.
  2. Some must be “switched on” to be active.
  3. Molecules bind to enzymes and enhance/inhibit activity (allosteric regulation).
  4. Adequate amounts of formed product inhibit enzyme activity
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3
Q

four principles of cell theory

A
  1. all organisms are composed of one or more cells, within which the process of life occurs.
  2. cells are the smallest living things. nothing smaller than a cell is considered alive
  3. all organisms living today represent a continuous line of descent from those early cells.
  4. cells arise only by division of a previously existing cell.
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4
Q

shared features of all cells

A
  1. obtain energy and nutrients from the environment
  2. use common building blocks to build things the molecules of life.
  3. use dna as a hereditary blueprint
  4. use rna to copy Dna
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