Question

electricity is added to recharge a battery. what is added to adp to form atp?
○ a a second ribose group
○ b a third phosphate group
○ c a third ribose group
○ d a second phosphate group

question 3 (4 points)
(02.05 lc)
food taken in by living organisms can be broken down and used to
○ a build starch molecules from glucose
○ b break down atp molecules
○ c build atp molecules from adp
○ d break the bonds in starch molecules

Explanation:

First Question (about ADP to ATP)

ADP (Adenosine Diphosphate) has two phosphate groups. ATP (Adenosine Triphosphate) has three phosphate groups. To form ATP from ADP, a third phosphate group is added, similar to recharging a battery by adding electricity. Option a is incorrect as ribose groups don't increase; option c is wrong (ribose group count doesn't change to three); option d is wrong as ADP already has two phosphates, so a third, not second, is added.

Food is broken down to release energy which is used to convert ADP to ATP (energy - carrying molecule). Option a: Starch is built from glucose in storage, not from food breakdown for energy use. Option b: ATP is broken down to release energy, but food breakdown is for making ATP, not breaking it. Option d: Breaking starch bonds is part of digestion to get glucose, but the energy from food is used to build ATP from ADP. So option c is correct.

Answer:

b. A third phosphate group

Second Question (about food breakdown in organisms)