VCA 18 - ENERGY & METABOLISM

Question 1

When muscles contract, chemical energy is converted to mechanical energy with the loss of heat. The release of heat is an example of the _____________ law of thermodynamics

Answer 1

Second

Question 2

ATP stands for _______________ and is important because it serves as the main unit of _______ in the cell

Answer 2

1. Adenosine Triphosphate
2. Energy

Question 3

If an enzyme in solution is saturated with substrate, the most effective way to obtain a faster yield of products is to:
A. Add more of the enzyme
B. Add more substrate
C. Heat the solution to 90ºC
D. Add a noncompetitive inhibitor

Answer 3

A. Add more of the enzyme

Question 4

When penguins eat fish, many (1)________ pathways occur to break down large molecules and release energy. This energy is used to build other molecules during (2)________ pathways. (3)________ energy is the (4)________ energy available for release in a chemical reaction.
(5)________ is responsible for mediating most energy coupling in cells. The (6)________ energy released from its hydrolysis may drive endergonic reactions and power the mechanical and transport work of a cell.
(7)________ is used to speed up a single reaction in intersecting metabolic pathways by lowering the (8)________ energy.

Answer 4

1. Catabolic
2. Anabolic
3. Chemical
4. Potential
5. ATP
6. Free
7. An enzyme
8. Activation