Lesson 7.3 Metabolism

Question 1

Define metabolism

Answer 1

all chemical reactions of life

Question 2

Define anabolic

Answer 2

making larger molecules out of smaller ones
ex; dehydration synthesis

Question 3

Define catabolic

Answer 3

breaking down larger molecules into smaller ones
ex: hydrolysis

Question 4

Define exergonic

Answer 4

Exiting energy; net release of energy
The amount of energy required to break bonds is less than the amount of energy released when making bonds.

Question 5

Define endergonic

Answer 5

Required net input of energy;The amount of energy required to break bonds is more than the amount of energy released when making bonds

Question 6

Define hydrolysis

Answer 6

The “ chemical breaking” of a polymer due to water.

Question 7

Define synthesis

Answer 7

The “ chemical making “ of monomers to a polymer due to water.

Question 8

Describe the ATP cycle.

Answer 8

For cells to receive energy, one of the phosphate groups in ATP must be broken off the molecule, releasing energy and resulting in ADP (catabolic;exergonic). Then together with cellular respiration, another phosphate group is made to convert ADP back in ATP (anabolic;endergonic).

Question 9

Is an anabolic reaction exergonic or endergonic?

Answer 9

An anabolic reaction is endergonic.

Question 10

Is a catabolic reaction exergonic or endergonic?

Answer 10

A catabolic reaction is exergonic.

Question 11

Give an example of an exergonic reaction being linked with an endergonic reaction and why they must occur in that order.

Answer 11

Photosynthesis is an exergonic reaction that is linked with cellular respiration which is an endergonic reaction. They must occur in this occur as photosynthesis’s products are the reactants for cellular respiration to occur in plants.