Chemical Reactions

Question 1

What are the 5 common biochemical reactions?

Answer 1

1- making and breaking carbon bonds
2- molecular re-arrangements
3- free radical rxns
4- group transfers
5- red/oxi rxns (redox)

Question 2

What is a condensation rxn?

Answer 2

Two molecules joining to create larger molecules

Question 3

What is a carboxylation/decarboxylation rxn?

Answer 3

Addition or removal of a carboxyl group

Question 4

What is a free radical?

Answer 4

A molecule with an unpaired electron

Question 5

How do antioxidants deal with free radicals?

Answer 5

Give up a proton and undergo conformational changes to stabilize

Question 6

What is a common example of a group transfer rxn?

Answer 6

Phosphorylation

Question 7

What are REDOX rxns?

Answer 7

Pair of rxns that move electrons to perform work

Question 8

What are the four ways to transfer electrons?

Answer 8

1- direct electron transfer (reduction)
2- hydrogen atom transfer (reduction)
3- hydride ions (reduction)
4- combination with oxygen (oxidation)

Question 9

Which direction does a reaction move towards with a positive or negative change in free energy?

Answer 9

Positive- moves toward reactants (anabolism)

Negative- moves toward products (catabolism)