Lab test #3: metabolism and energy (power point)

Question 1

___ must gain external energy in order to counteract the increase in their entropy​ ​ Photosynthetic

organisms use external ___ energy to maintain orderly structure​ ​

Non-photosynthetic organisms use stored___ in other living things to counter increasing entropy (disorder)

Answer 1

Living things

solar

chemical energy

Question 2

Chemical reactions are processes that form or break ___ between atoms​

Chemical reactions convert ___ to products​

​

Reactants ——-> Products

Answer 2

chemical bonds

reactants

Question 3

Exergonic reactions ___ energy​

Reactants contain more energy than products in exergonic reactions

Answer 3

release

Exergonic reaction example: the burning of glucose

Question 4

___ reactions require an input of energy

Products contain more energy than reactants in endergonic reactions

Answer 4

Endergonic

Endergonic reaction example: photosynthesis

Question 5

___ molecules act as intermediates to carry energy between exergonic and endergonic reactions

Energy carrier molecules are only used ___ cells because they are unstable

___ is the most common energy carrying molecule

Answer 5

Energy carrier

within

Adenosine triphosphate (ATP)

Question 6

The sum of all the chemical reactions inside a cell is its ___

​

Many cellular reactions are linked through ___

Answer 6

metabolism​

metabolic pathways

Question 7

Metabolic pathways proceed smoothly for three reasons:​

Answer 7

Endergonic reactions are coupled with exergonic reactions​

Energy-carrier molecules capture energy and transfer it between exergonic and endergonic reactions​

Chemical reactions are regulated through protein enzymes

Question 8

___ molecules are employed to catalyze (speed up) chemical reactions in cells

Answer 8

Enzyme

Question 9

The main stages of glucose metabolism are:​

Answer 9

Glycolysis​

Cellular respiration