Biochemistry Final Examination (Portage Learning
True/False
1. Nitrogen is called the superglue of the chemical world.
Ans: False
2. Large elements such as strontium are common in biomolecules.
Ans: False
3. The time it takes for a compound to flow through a metabolic pathway
is called the pay-off phase.
Ans: False
4. Proteins, carbohydrates, and fats all get broken down into acetyl-CoA.
Ans: True
5. A fat is a lipid molecule that is solid at room temperature.
Ans: True
6. In DNA, guanine always pairs with ___.
Ans: Cytosine
7. Water is considered a polar solvent due to attractive forces known as
hydrogen bonds. A hydrogen bond is ___.
Ans: An attractive force between molecules where partially
positive hydrogen atoms are attracted to partially negative
atoms of F, O or N.
8. Which of the following is the structure of ADP?
Ans: 2 double O bonds
9. Water is a unique molecule. Which of the following contributes to
water’s unique place in the chemical world?
Ans: All answers are correct.
10. The H+ concentration of a solution is 7.9 x 10-13 M. What
is the pH?
Ans: 12.1
[H+]=7.9 x10-13;
pH=-log [7.9 x10-13]=12.1
11. Which of the following is the enthalpy change of a
reaction?
Ans: H
12. The following is what type of protein secondary structure?
, Ans: Anti-parallel beta sheet
13. A globular protein is an example of a protein ____.
Ans: Conformation
14. Any molecule or ion that is necessary for an enzyme’s
function is called a ___.
Ans: Cofactor
15. A(n) ____ is a compound that binds to an enzyme is such a
way that the enzyme slows down to stop the enzyme reactions.
Ans: Inhibitor
16. The following are all examples of a carbohydrate’s
function in cells except ___.
Ans: Basis for building proteins
17. The following are all example of a ___ biomolecule.
Ans: Protein
18. A particular lipid is a liquid at room temperature, so it is
called a(n) ___.
Ans: Oil
19. The following separates life from non-life.
Ans: Cellular membranes or lipid bilayer surrounding the cell.
20. The primary sequence of proteins is written ___.
Ans: N to C terminal
21. A lipid is ____.
Ans: A molecule that dissolves in a non-polar solvent
22. Lipids are catabolized by the ___ pathway.
Ans: B-oxidation
23. FADH2 provides energy by denoting electron and
hydrogens to the ___.
Ans: ETC
24. The direct production of ATP occurs as H+ ions flow
through ___ into the mitochondrial matrix.
Ans: ATP synthesis
25. The following processes result in either the “production of
ATP” or in the “consumption of ATP”. Put each of the following into the
appropriate category.
Ans: 1. Fructose 6-phosphate forms Fructose-1,6-
bisphosphate=consumption of ATP
2. Oxidative phosphorylation=production of ATP
True/False
1. Nitrogen is called the superglue of the chemical world.
Ans: False
2. Large elements such as strontium are common in biomolecules.
Ans: False
3. The time it takes for a compound to flow through a metabolic pathway
is called the pay-off phase.
Ans: False
4. Proteins, carbohydrates, and fats all get broken down into acetyl-CoA.
Ans: True
5. A fat is a lipid molecule that is solid at room temperature.
Ans: True
6. In DNA, guanine always pairs with ___.
Ans: Cytosine
7. Water is considered a polar solvent due to attractive forces known as
hydrogen bonds. A hydrogen bond is ___.
Ans: An attractive force between molecules where partially
positive hydrogen atoms are attracted to partially negative
atoms of F, O or N.
8. Which of the following is the structure of ADP?
Ans: 2 double O bonds
9. Water is a unique molecule. Which of the following contributes to
water’s unique place in the chemical world?
Ans: All answers are correct.
10. The H+ concentration of a solution is 7.9 x 10-13 M. What
is the pH?
Ans: 12.1
[H+]=7.9 x10-13;
pH=-log [7.9 x10-13]=12.1
11. Which of the following is the enthalpy change of a
reaction?
Ans: H
12. The following is what type of protein secondary structure?
, Ans: Anti-parallel beta sheet
13. A globular protein is an example of a protein ____.
Ans: Conformation
14. Any molecule or ion that is necessary for an enzyme’s
function is called a ___.
Ans: Cofactor
15. A(n) ____ is a compound that binds to an enzyme is such a
way that the enzyme slows down to stop the enzyme reactions.
Ans: Inhibitor
16. The following are all examples of a carbohydrate’s
function in cells except ___.
Ans: Basis for building proteins
17. The following are all example of a ___ biomolecule.
Ans: Protein
18. A particular lipid is a liquid at room temperature, so it is
called a(n) ___.
Ans: Oil
19. The following separates life from non-life.
Ans: Cellular membranes or lipid bilayer surrounding the cell.
20. The primary sequence of proteins is written ___.
Ans: N to C terminal
21. A lipid is ____.
Ans: A molecule that dissolves in a non-polar solvent
22. Lipids are catabolized by the ___ pathway.
Ans: B-oxidation
23. FADH2 provides energy by denoting electron and
hydrogens to the ___.
Ans: ETC
24. The direct production of ATP occurs as H+ ions flow
through ___ into the mitochondrial matrix.
Ans: ATP synthesis
25. The following processes result in either the “production of
ATP” or in the “consumption of ATP”. Put each of the following into the
appropriate category.
Ans: 1. Fructose 6-phosphate forms Fructose-1,6-
bisphosphate=consumption of ATP
2. Oxidative phosphorylation=production of ATP
