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

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1
Q

___ 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)

A

Living things

solar

chemical energy

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2
Q

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

Chemical reactions convert ___ to products​

Reactants ——-> Products

A

chemical bonds

reactants

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3
Q

Exergonic reactions ___ energy​

Reactants contain more energy than products in exergonic reactions

A

release

Exergonic reaction example: the burning of glucose

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4
Q

___ reactions require an input of energy

Products contain more energy than reactants in endergonic reactions

A

Endergonic

Endergonic reaction example: photosynthesis

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5
Q

___ 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

A

Energy carrier

within

Adenosine triphosphate (ATP)

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6
Q

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

Many cellular reactions are linked through ___

A

metabolism​

metabolic pathways

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7
Q

Metabolic pathways proceed smoothly for three reasons:​

A

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

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8
Q

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

A

Enzyme

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9
Q

The main stages of glucose metabolism are:​

A

Glycolysis​

Cellular respiration

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