Energy in cells

Question 1

Where is energy is mostly stored in

Answer 1

ATP

Question 2

reactions release energy, making it available for cellular work.

Answer 2

exergonic

Question 3

reactions are driven forward with the addition of energy.

Answer 3

endergonic

Question 4

Exergonic and endergonic reactions are often coupled so that

Answer 4

released energy is immediately put to work

Question 5

Cells possess specialized enzyme systems that trap the energy present in the bonds of nutrients as they are progressively broken: Energy released during exergonic reactions is stored in

Answer 5

high-energy phosphate bonds in ATP.

Question 6

Cells possess specialized enzyme systems that trap the energy present in the bonds of nutrients as they are progressively broken: ATP temporarily stores and releases the energy in these chemical bonds to

Answer 6

fuel endergonic reactions.

Question 7

loss of electrons
When a compound loses electrons, it is oxidized

Answer 7

Oxidation:

Question 8

gain of electrons
When a compound gains electrons, it is reduced.

Answer 8

reduction

Question 9

Oxidation-reduction (redox) reactions are common in the cell and are indispensable to the

Answer 9

required energy transformations.

Question 10

enzymes that remove electrons from one substrate and add them to another:
Their coenzyme carriers are nicotinamide adenine dinucleotide (NAD) and flavin adenine dinucleotide (FAD)

Answer 10

Oxidoreductases:

Question 11

: an electron donor and an electron acceptor involved in a redox reaction

Answer 11

Redox pair