Biochem help, please!?

Question

Please help me answer these! Just one is fine! THANKS A BUNCH!

1. Summarize how energy is made available by chemical reactions and describe what happens to the usable energy.

2. How is ATP similar to sugar? To DNA?

3. Energy needed for metabolism does NOT come from:
__A. food
__B. lipids
__C. carbohydrates
__D. water

4. Most enzymes are:
__A. lipids
__B. carbohydrates
__C. proteins
__D. nucleic acids

5. Explain the relationship between an enzyme and the activation energy of the reaction in which the enzyme participates.


IF ANYONE COULD HELP CONTRIBUTE TO MY STUDY GUIDE, THANK YOU SO MUCH!

Answer 1

1. Chemical reactions involve the breaking and formation of chemical bonds. If the new bonds that are formed contain less energy than the bonds that were broken, there is a net release of energy that can be available for other processes. The usable energy goes towards driving the motion of parts of the cell, and this takes place in the mitochondria, an organelle.

2. ATP is similar to sugar because it consists of a sugar with an additional chemical group bonded to it. It is similar to DNA because that group is adenine, one of the base pairs in DNA.

3. B) Lipids.

4. C) Proteins.

5. Enzymes reduce the activation energy for chemical reactions, enabling them to happen more easily. The enzyme is normally not consumed in the reaction.

Answer 2

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