Question

1. which part of the atp molecule is considered \high energy\? *

bond between the 1st and 2nd phosphates.
the third phosphate.
bond between the 2nd and 3rd phosphates.
the second phosphate.

1. according to the laws of thermodynamics, *

energy can be created.
energy can be transferred.
energy can be destroyed.
energy is never lost as heat.

Explanation:

Question 4

ATP (adenosine triphosphate) has three phosphate groups. The bond between the 2nd and 3rd phosphates is a high - energy phosphate bond. When this bond is broken (during hydrolysis), a large amount of energy is released. The bond between the 1st and 2nd phosphates is not a high - energy bond in the same way. The third phosphate or the second phosphate themselves are not the "high - energy" part; it's the bond between the 2nd and 3rd phosphates.

According to the first law of thermodynamics, energy can neither be created nor destroyed, but it can be transferred or transformed. The second law of thermodynamics states that energy transformations are not 100% efficient and some energy is lost as heat. So, energy can be transferred, while the other options (energy can be created, energy can be destroyed, energy is never lost as heat) are incorrect.

Answer:

Bond between the 2nd and 3rd phosphates.

Question 5