test 2

Question 1

2nd law of thermodynamics

Answer 1

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

Question 2

four ways cells regulate mataboism

Answer 2

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

Question 3

four principles of cell theory

Answer 3

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.

Question 4

shared features of all cells

Answer 4

4. obtain energy and nutrients from the environment
5. use common building blocks to build things the molecules of life.
6. use dna as a hereditary blueprint
7. use rna to copy Dna