Study Guid 1 (pt 6)

Question 1

Describe a metabolic pathway and the role of enzymes in metabolic pathways

Answer 1

begins with a specific molecule, which is then altered in a series of defined steps, resulting in a certain product

Question 2

istinguish between anabolic and catabolic pathways in terms of products and energy.

Answer 2

anabolic pathways are endergonic and consume energy, catabolic pathways are exergonic and breakdown complex substances

Question 3

Define energy and distinguish between kinetic, potential, thermal, and chemical energy.

Answer 3

• energy: capacity to cause change
• kinetic energy: relative motion of objects
• thermal energy: kinetic energy associated w the random movement of atoms or molecules
• potential energy: energy that is not kinetic
• chemical energy: potential energy available for release in a chemical reaction

Question 4

The study of energy transformations that occur in a collection of matter is called

Answer 4

thermodynamics

Question 5

State the principle of the conservation of energy.

Answer 5

energy can be transferred and transformed but it cannot be created nor destroyed

Question 6

Define ‘free energy’

Answer 6

the proportion of a persons energy that can perform work when temperature and pressure are uniform throughout a system

Question 7

How does the value (sign) of G predict if a reaction is spontaneous, exergonic or endergonic?

Answer 7

If G is negative, the reaction is spontaneous and exergonic

if G is positive, the reaction is endergonic

Question 8

what happens whena cell or an organism reaches a metabolic equilibrium?

Answer 8

maximum stability

Question 9

Describe how ATP stores and releases energy.

Answer 9

energy is released when an ATP is broken down into ADP and P(i)

Question 10

Define the term: catalyst

Answer 10

a chemical agent that speeds up a chemical reaction