BICH 409
Texas A&M University
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Examen
Exam III BICH 409 Tamu Bryant Miles Questions and Answers.
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---2marzo 20262025/2026
- haworth projection of alpha-D-glucopyranose - Answer 
 
Which of the following is not a glycoaminoglycan? 
a) amylopectin 
b) hyaluronate 
c) heparin 
d) Chondroitin-4-sulfate 
e) Dermatan sulfate - Answer Amylopectin 
 
How is cellulose held together? - Answer Cellulose is held together by intermolecular hydrogen bonds 
 
Which of the following contributes to the structural rigidity of cellulose? 
A) The conformation of the cellulose polymer adapts a helical conformation. 
B...
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Examen
BIOCHEM 409 FINAL EXAM REVIEW QUESTIONS AND ANSWERS.
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---4marzo 20262025/2026A+
- In Edman's degredation, phenylisothiosyanate reacts with: - Answer the alpha-amino group of the amino-terminal residue of the protein 
 
If the following polypeptide were folded into an alpha-helix, to which amino acid's carbonyl oxygen would the amide hydrogen of glutamine be hydrogen bonded? 
Trp-Asp-Tyr-Ile-Gln-His-Cys-Ala-Thr - Answer Tryptophan 
 
If heat is released by a spontaneous chemical reaction, then the reaction is said to be: - Answer Exothermic and Exergoni...
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Examen
BICH-409-Exam III Questions and Answers.
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---3marzo 20262025/2026A+
- Enzymes that catalyze the hydrolysis of the peptide backbone are called - Answer Proteases 
 
Chymotrypsin cleaves after - Answer Phe, Tyr, Trp 
 
Trypsin cleaves after - Answer Arg and Lys 
 
Elastase cleaves after - Answer Gly, Ala, Val, Ser 
 
The serine protease catalytic triad is composed of - Answer Asp, Ser & His 
 
Serine protease reaction mechanisms involve: - Answer General acid-base and covalent catalysis. 
 
In the First step of the reaction cataly...
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Examen
BICH 409 Final Exam 1 Test Questions with All Correct Answers 2025-2026 Updated.
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---25marzo 20262025/2026A+
- isolated system - Answer no exchange of energy or matter (thermos, ice chest) 
 
closed system - Answer only energy is allowed to be exchanged (chicken egg, unopened soda, stoppered reaction flask) 
 
open system - Answer both energy and matter are allowed to exchange 
(human, cell, open reaction flask, opened soda) 
 
what is the only way to change internal energy in a closed system? - Answer heat or work 
 
first law of thermodynamics - Answer the energy of the u...
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Examen
Bich 409 Exam Two Test Questions with Guaranteed Pass Solutions 2025-2026 Updated.
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---52marzo 20262025/2026A+
- small organisms' oxygen requirements are met by _________ ________ of oxygen through their bodies - Answer passive diffusion 
 
oxygen solubility in aqueous solution is _______ - Answer low 
< 10^-4M 
 
what is found in the blood of organisms that is able to carry oxygen concentrations of 0.01M (same as the O2 concentration in the air of our atmosphere)? - Answer hemoglobin 
 
an intracellular protein found in muscle tissue - Answer myoglobin 
 
what is the function...
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Bich 409 Exam four/Final Exam Study Guide Exam with Actual Detailed Answers 2026 Updated.
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---54marzo 20262025/2026A+
- what is gluconeogenesis? - Answer the synthesis of glucose from noncarbohydrate precursors 
 
what is the primary energy source for the brain? - Answer glucose 
 
when must glucose be synthesized from noncarbohydrate precursors in order to maintain the blood glucose levels? - Answer for fasting periods longer than one day, or during periods of intense exercise 
 
what are the noncarbohydrate precursors used in gluconeogenesis? - Answer - pyruvate 
- lactate 
- oxaloacetat...
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BICH 409 Exam 3 Test Questions and All Correct Answers 2025-2026 Updated.
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---27marzo 20262025/2026A+
- Classes of Lipids - Answer Fatty Acids • Triacylglycerols •Glycerophospholipids • Sphingolipids • Waxes • Isoprene-based lipid 
 
Fatty Acids nomenclature - Answer n = No double bond 
(delta)- which carbon has double 
Cis- Acyl group is the same side 
Trans- Acyl group is opposite sides 
 
Lauric Acid - Answer 12:0 
 
laurate - Answer 12:0 
 
mystic acid - Answer 14:0 
 
palmitic acid - Answer 16:0 
 
stearic acid - Answer 18:0 
 
Arachidic aci...
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Examen
BICH 409 Exam 3 Final Test Questions and All Correct Answers.
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---11marzo 20262025/2026A+
- The graph shown is a saturation curve vs substrate concentration for a protein. The shape of this curve indicates: 
 
a. Two proteins are competing for the same substrate. 
b. The protein is an enzyme. 
c. The protein cooperatively binds the substrate. 
d. The protein has four substrate binding sites. 
e. The hill coefficient n = 1. - Answer c 
 
Enzymes catalyze reactions by: 
 
a. Stabilizing the substrates of the reaction. 
b. Lowering the activation energy. 
c. Changing the equilibrium...
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Examen
BICH 409 Exam 1 And Exam 2 And All Correct Answers 2025-2026 Updated.
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---19marzo 20262025/2026A+
- Basic functional groups of biochem - Answer - acyl 
- amido 
- amino 
- carbonyl 
- carboxyl 
- ester 
- ether 
- hydroxyl 
- imino 
- phosphoryl 
- pyrophosphoryl 
- sulfhydryl 
 
aspartate and glutamate (mostly glutamate) - Answer most soluble amino acids in water at pH 7 
 
electrostatic/ionic interactions - Answer - nondirectional 
- 1-80 kJ/mol (about 20 in water, higher when water isn't present) 
- 1/r 
 
dipole-dipole - Answer - directional 
- 1-10 kJ/mol 
- 1/r...
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