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C HEM 210 Final E xam
True or False: Nitrogen is called the superglue of the chemical world.
FALSE
True or False: Large elements, such as strontium, are common in biomolecules.
FALSE
True or False: The time it takes for a compound to flow through a metabolic pathway iscalled the payoff phase.
FALSE
True or False: Proteins, carbohydrates, and fats all get broken down into acetyl-CoA.
TRUE
True or False: A fat is a lipid molecule that is a solid at room temperature.TRUE
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Question 1
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In DNA, guanine always pairs with.
Thymine Guanine Uracil
B
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Question 11
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Water is a unique molecule. Which of the following contributes to water’s unique placein the chemical world?
The geometry of the moleculeThe polarity of the O-H bonds The ability of water molecules to hydrogen bondThe bond angle of water All of the answers are correct
ALL ANSWERS ARE CORRECT
Scientific Calculator
The H+ concentration of a solution is 7.9 x 10-13 M. What is the pH?
[ [H+]=7.9 x 10-13; pH=-log[7.9 x 10-13]= 12.1]
Question 9
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Question 12
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A) ΔG
B) ΔS
C) ΔH
D) ΔF
E) None of the above
C
The following is what type of protein secondary structure?
Question 13
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Alpha helix Beta turn Parallel beta sheet Anti- parallel beta sheet Globular sheet
ANTI-PARALLEL BETA SHEET
A globular protein is an example of a protein.
motif Conformation Secondary structure Quaternary structure Amino acid
CONFORMATION
Question 17
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BASIS FOR BUILDING PROTEINS
The following is an example of a biomolecule.
Protein Carbohydrate Lipid Nucleic acid None of the above
PROTEIN
Question 18
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Question 20
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A particular lipid is a liquid at room temperature, so it is called a(n).
Oil Fat Lipid Membrane Sphingolipid
OIL
E
The following separates life from non-life.
Cellular membranes Carbohydrates that provide the necessary energyFats that provide energy to organisms Protein transporting oxygen
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Question 25
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A. Glycolysis
B. Β-oxidation
C. Urea cycle
D. Both A and C
E. Both B and C
B. B-OXIDATION
FADH 2 provides energy by donating electron and hydrogens to the.
A. ETC
B. CAC
C. β-oxidation pathway
D. glycolysis pathway
E. All of the above
A
The direct production of ATP occurs as H+ ions flow through into the mitochondrial matrix.
urea cycle is a four-step cyclic process that converts NH4+ to urea, which is then excreted from the body. Once the NH4+ is removed, it
Question 28
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Question 29
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Question 30
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is acted upon in the mitochondria by an enzyme, carbamoyl phosphate synthetase 1, that synthesizes carbamoyl-phosphate. The carbamoyl phosphate enters the cytosol and continue through the three further steps of the urea cycle producing urea. The urea, containing two atoms ofnitrogen, is then excreted.
Describe at least three properties of carbon that permit it to be the basis of life.
**1. Carbon can form sable covalent bonds with a variety of different elements.
- Besides, carbon can form double and triple bonds with other carbon atoms andother elements (N and o).
- Carbon can form long chains by forming numerous carbon-carbon bonds; wecall these large molecules polymer.
- Lastly, carbon can form cyclic structures, which are also called ring compounds.**
Which types of molecules are most likely to be present in membranes?
Phosphoglycerides, sphingolipids, cholesterol, and proteins are all foundin 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.
A group of molecules forms a clathrate in water. What is a clathrate and why does itform?
The hydrophobic effect helps scientists explain how biological molecules
