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Question 17 of 45 Plants store excess glucose as starch which is composed of amylose and amylopectin. Identify the characteristics of amylopectin. A) A straight chain polysaccharide containing only straight chain a-1-4 linkages of glucose residues. B) A polysaccharide containing a-1-4 linkages of glucose units and branching due to a-1-6 linkages of glucose residues C) A straight chain polysaccharide with a-1-4 linkages of glucose and galactose residues D) A branching polysaccharide containing a-1-4 linkages of glucose and galactose residues E) A branching polysaccharide containing a-1-4 linkages and a-1-6 linkages of glucose and galactose residues Submit +

HW 11 #19

HW11 #22

*22) Draw the Fischer projection and Hayworth formula for D-galactose - the C4 epimer of D- glucose. (Okay to skip this for discussion with molecular models in lab.) Fischer projection of D-galactose Hayworth formula of a-D-galactose Reactions and Disaccharides 23) Aldehydes are oxidized to: 24) Open-chain aldoses can be oxidized, so they are called 'reducing sugars'. When D-glucose is oxidized, what is the carboxylic acid formed? 25) Can the hemiacetal be oxidized? 25) Can a ketose be oxidized? CHM60 Lecture Worksheet: Carbohydrates J 5 2

1) What is epimerization? A) It involves changing the configuration of a carbon B) It involves oxidation of an aldose. C) It involves lengthening the chain of an aldose. D) It involves reduction of an aldose. E) none of the above 2) Which of the following monomer: polymer pairings is mismatched? a. Amino acids: proteins b. Amino acids: peptides c. Monosaccharides: polysaccharides d. Nucleotides: DNA e. They are all correctly matched 3) How do the a and ẞ anomer of a sugar differ? a. By the configuration of the acetal carbon in the ring form b. c. By whether a ketone or aldehyde is present in the straight chained form By the presence/absence of a 2' OH d. By whether the OH on the last chiral center is pointed right or left in the Fischer projection of the straight chained form 4) A salt bridge can occur as part of the apply) a. Primary structure b. Secondary structure of a protein (select all that c. Tertiary structure d. Quaternary structuré 5) True or false: A protein that has been…

Which of the following will produce both glucose and galactose when it is hydrolyzed? a) Sucrose b) maltose c) lactose d) amylose

Raffinose is a trisaccharide found in whole grains. What is the correct description of the glycosidic linkage(s) in raffinose?

Please complete the following question. There is no need to provide an explaination. 7

346 Laboratory Manual for General, Organic, and Biological Chemistry Q2 From the results in Part B, which carbohydrates are ketoses? Q3 From the results in Part C, which carbohydrates give a positive fermentation test? Q4 From the results in Part D, which carbohydrates give a blue-black color in the iodine test? isubs vol Identifying an Unknown Carbohydrate Unknown No. Results with Unknown Carbohydrates Present Benedict's (A) Seliwanoff's (B) Fermentation (C) Iodine (D) What carbohydrate(s) is/are in your unknown? bot O Questions and Problems Q5 What carbohydrate(s) would give the following test results? a. Produces a reddish-orange solid with Benedict's reagent and a red color with Seliwanoff's reagent in 1 minute