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Chem 210 Module 4 Exam (2023/2024) Newest Questions And Correct Answers (Verified Answers, Exams of Biochemistry

Alverno CollegeBiochemistry

Chem 210 Module 4 Exam (2023/2024) Newest Questions And Correct Answers (Verified Answers) Chem 210 Module 4 Exam (2023/2024) Newest Questions And Correct Answers (Verified Answers) Chem 210 Module 4 Exam (2023/2024) Newest Questions And Correct Answers (Verified Answers)

Typology: Exams

2024/2025

Available from 04/15/2025

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Chem 210 Module 4 Exam (2023/2024) Newest Questions
And Correct Answers (Verified Answers)
1. Which of the following monosaccharides is a ketose?
Dihydroxyacetone
Galactose
Glucose
Glyceraldehyde
Idose: dihydroxyacetone
2. When two carbohydrates are epimers:
One is a pyranose, the other a furanose
One is an aldose, the other a ketose
They differ in length by one carbon
pf3
pf4
pf5
pf8
pf9
pfa
pfd
pfe
pff

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Download Chem 210 Module 4 Exam (2023/2024) Newest Questions And Correct Answers (Verified Answers and more Exams Biochemistry in PDF only on Docsity!

Chem 210 Module 4 Exam (2023/2024) Newest Questions

And Correct Answers (Verified Answers)

1. Which of the following monosaccharides is a ketose? Dihydroxyacetone Galactose Glucose Glyceraldehyde Idose: dihydroxyacetone 2. When two carbohydrates are epimers: One is a pyranose, the other a furanose One is an aldose, the other a ketose They differ in length by one carbon

They differ only in the configuration about one carbon atom They react differently with iodine: They differ only in the confirmation about one carbon atom

  1. : D.) alpha-D-glucose and beta-D-glucose 4. Lactose is made from linking galactose and glucose. When this happens, . Gas is eliminated An anomeric carbon is formed on carbon- 1 Water is released An epimer is formed An aldose is formed: water is released 5. Amylose and amylopectin are both polymers of: A) ±D- -glucose

E) Both have O-glycosidic linkages: A.) both have beta-D-Glucose monomers

7. Which monosaccharide is not a six-carbon monosaccharide? Fructose Ribose Mannose Galactose Glucose: ribose 8. The two monosaccharides shown below could best be described as: Anomers Aldoses Ketoses

Epimers Pentoses: epimers

  1. Which arrow correctly identifies the atom that will become the anomeric carbon?: The first carbon at the top of the Fischer structure
  2. Based on the form of the cyclic sugar below in a Haworth projection, which Fischer projection formula could have formed this structure?: look at the hawthorn projection and create Fischer projections for it
  3. The following monosaccharides are covalently bonded. What type of bond unites them?: alpha 1-> vertical and through the downward pointing OH group off of carbon 1 1-4 is just side by side 12. Which statement about cellulose is true?

13. The polysaccharide cellulose is most chemically similar to: Glycogen Dextrose Glycogen Chitin Starch: chitin 14. Which of the following is the most common monosaccharide on earth? Ribose Cellulose Chitin Sucrose Glucose: glucose 15. The "D" in the D-carbohydrates stands for:

Derivation Double Disaccharide 3-dimensional Dextrorotatory: dextrorotatory

16. Which compound does not fit the formal definition of a carbohydrate? A. C6H12O B. C7H10O C. C8H16O D. C3H6O E. C4H8O4: B. C7H10O

  1. identify the hemiacetal bond: includes the anomeric carbon, H, OH, and O in the ring
  2. tell the difference between alpha beta and D and L configurations: D &

20. Amylopectin has ±1 ’ 6 branching about every residues. 1 to 10 8 to 12 10 to 30 24 to 30 No branching: 24 to 30 21. What element besides C, H, and O is found in the chitin? Br N P S Cl: N 22. Some carbohydrates form a(n) structure, which resembles a structure in proteins.

A) ±form B) ²-turn C) ²eta-sheet D) D-configuration E) ±h-elix: E.) alpha- helix

23. The equilibrium between structures is called mutarotation. A) Anomer and epimer B) ±and ² C) L and D D) Helix and beta sheet E) None of the above: B.) alpha and beta 24. Consider the functions of carbohydrates. Which of the following is not a function of these molecules?

Sucrose Starch: sugar

  1. Table sugar dissolves easily in water. Given its structure, explain why this is.: Surcrose contains -OH groups which can form hydrogen bonds with H2O. these non-covalent interactions allow solubility by permitting carbs to interact with H2O and become an aqueous solution. 27. A) In the above structure, how many monosaccharide units are furanoses and how many are pyranoses? B) What is the linkage between the monosaccharides? C) Is this a reducing sugar?: a.) 2 pyranoses and 0 furanoses b.) beta 1 to 4 c.) yes because it has a free anomeric carbon
  1. A hiker is lost in the wilderness and without food. He runs across several beetles with hard chitin exoskeletons. Would he get nutrition in the form of glucose from eating these beetles? Explain.: Chitin is made out glucose residues with the beta 1 to 4 bond however human enzymes cannot break down this specific glucose residue because they can only act upon the alpha 1 to 4. so the hiker will not intake any glucose from eating the beetles and he should not eat the beetles.
  2. What is the difference between amylose and amylopectin?: amylose is a single chain of glucose molecules connected by alpha 1 to 4 linkages. However, amylopectin also contains a main chain connect by alpha 1 to 4b linkages but it branches every 24 to 30 glucose residues. the branches are a different type of linkage called alpha 1 to 6 linkages however within the branched they contain alpha 1 to 4 linkages.