Metabolism: Enzymes and Energy Flashcards Preview

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Flashcards in Metabolism: Enzymes and Energy Deck (14)
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1
Q

Potential Energy

A

Stored energy waiting to do its work - capacity to do work is not being use

2
Q

Kinetic Energy

A

Energy at work, or the energy of movement

3
Q

Cells and the flow of energy

A

Under the right conditions, energy can be transferred form one type to another

4
Q

Metabolism

A

The sum of all chemical reactions in the cell

5
Q

Anabolism

A

Reactions that synthesize complex molecules from simple molecules

6
Q

Catabolism

A

Reactions that breakdown complex molecules to simple molecules

7
Q

Reactants

A

The substances that start chemical reactions

8
Q

Products

A

The substances that form as a result of chemical reactions

9
Q

Exergonic Reactions

A

Chemical reactions that release energy

10
Q

How is energy transferred from the exergonic reaction to the endergonic reaction?

A

by the energy carrier molecule ATP

11
Q

Where do endergonic reactions get their input energy from?

A

The exergonic reactions they are coupled to

12
Q

Adenosine Triphosphate (ATP)

A

The energy of chemical fuel molecules must be transferred into ATP in an exgeronic chemical reaction
Second and third phosphate bonds of ATP are unstable
When this phosphate bond is broken by hydrolysis, energy is released - product is ADP and phosphate

13
Q

Metabolic Pathway

A

Series of linked chemical reactions that begin with a particular reactant and terminates with an end product

14
Q

metabolic pathways must be tightly regulated for our cells to function

A
  1. Cells couple endergonic chemical reactions with exergonic chemical reactions
  2. Cells have energy carrier molecules that capture energy released in exergonic reactions and transport it to endergonic reactions
  3. Cells regulate chemical reactions using enzymes, which are protein catalysts