Download CHEM 210 Final Exam tested questions with revised correct answers, a+ guarantee and more Exams Nursing in PDF only on Docsity!
CHEM 210 Final Exam Questions And Answers
1. True or False: Nitrogen is called the superglue of the chemical world.: FALSE
2. True or False: Large elements, such as strontium, are common in biomole- cules.: FALSE
3. True or False: The time it takes for a compound to flow through a metabolic pathway is called the
payoff phase.: FALSE
4. True or False: Proteins, carbohydrates, and fats all get broken down into acetyl-CoA.: TRUE
5. True or False: A fat is a lipid molecule that is a solid at room temperature.-
: TRUE
6. In DNA, guanine always pairs with .: Cytosine
7. Which of the following is the structure of ADP?: 2 DOUBLE O
8. The H+ concentration of a solution is 7.9 x 10-13 M. What is the pH?: 12.1 [ [H+]=7.9 x 10-13;
pH=-log[7.9 x 10-13]= 12.1]
nti-
parallel
9. Which of the following is the enthalpy change of a reaction?: ”H
10. The following is what type of protein secondary structure?: A beta sheet
11. A globular protein is an example of a protein .: Conformation
12. Any molecule or ion that is necessary for an enzyme's function is called a: Cofactor
13. A(n) is a compound that binds to an enzyme in such a way that the enzyme slows
down or stop the enzyme reactions.: Inhibitor
14. The following are all examples of a carbohydrate's function in cells except
.: Basis for building proteins
15. The following is an example of a biomolecule.: Protein
16. A particular lipid is a liquid at room temperature, so it is called a(n)
.: Oil
20. Lipids are catabolized by the pathway.: B-oxidation
21. FADH2 provides energy by donating electron and hydrogens to the
.: ETC
22. The direct production of ATP occurs as H+ ions flow through into
the mitochondrial matrix.: ATP Synthase
23. The following processes result in either the "Production of ATP" or in the "Consumption of ATP".
Put each of the following into the appropriate cate- gory.: 1. Fructose-6-phosphate forms Fructose-1,6- bisphosphate = Consumption of ATP
2. Oxidative phosphorylation = Production of ATP
3. Glucose forms two pyruvates = Production of ATP
4. Pyruvate forms acetyl-CoA = Production of ATP
5. NH4+ is made into urea = Consumption of ATP
- In human cells, amino acids are degraded to ammonium NH4+ and carbon skeletons. How is the nitrogen then further processed and excreted from these cells.: 1. Nitrogen is processed separately from
carbon and oxygen, in the urea cycle. The urea cycle is a four-step cyclic process that converts NH4+ to urea, which is then excreted from the body.
2. Once the NH4+ is removed, it is acted upon in the mitochondria by an enzyme, carbamoyl phosphate
synthetase 1, that synthesizes carbamoyl-phosphate.
3. The carbamoyl phosphate enters the cytosol and continue through the three further steps of the urea
cycle producing urea. The urea, containing two atoms of nitrogen, is then excreted.
- Describe at least three properties of carbon that permit it to be the basis of life.: 1. Carbon can form stable covalent bonds with a variety of different elements.
2. carbon can form double and triple bonds with other carbon atoms and other elements (N and O).
3. Carbon can form long chains by forming numerous carbon-carbon bonds called polymers.
4. Lastly, carbon can form cyclic structures, which are also called ring compounds.
28. Which types of molecules are most likely to be present in membranes?-
: Phosphoglycerides, sphingolipids, cholesterol, and proteins are all found in the membrane. These molecules are all loosely associated with each other as described by the fluid mosaic model of the cellular membrane. They form a membrane bilayer.
29. A group of molecules forms a clathrate in water. What is a clathrate and why does it form?: The
way that water groups together is called a clathrate, and means ordered water molecules. It allows water to form with itself, and helps the non-polar regions become dissolved via hydrogen bonds.
30. Hydrogen is called the superglue of the chemical worlds.: FALSE
ci
d
43. In a particular cell, molecule X binds to an enzyme causing it to stop catalyzing reactions.
Molecules X is called what?: Inhibitor
44. The following are all example of a lipid's function in cells except : -
Catalysis
45. The following is an example of a biomolecule.: Nucleic A
46. A particular lipid is a solid at room temperature, so it's called a(n).: Fat
47. The primary sequence of proteins is written : 5' to 3'
48. Proteins are catabolized by the pathway: Urea cycle
