When cellulose is indigestible to an animal, what could be the reason? animals do not have the enzymes to digest beta-glycosidic linkages between monomer units animals do not have the enzymes to digest alpha-glycosidic linkages between monomer units O its molecular weight is too high for it to be degraded by enzymes animals do not have the enzymes to digest ester linkages between monomer units Question 52 Which of these statements is INCORRECT? O Glutamic acid and asparagine are acidic amino acids Tryptophan and phenylalanine are aromatic amino acids Alanine and valine are neutral amino acids O Lysine and arginine are basic amino acids.

When cellulose is indigestible to an animal, what could be the reason? animals do not have the enzymes to digest beta-glycosidic linkages between monomer units animals do not have the enzymes to digest alpha-glycosidic linkages between monomer units O its molecular weight is too high for it to be degraded by enzymes animals do not have the enzymes to digest ester linkages between monomer units Question 52 Which of these statements is INCORRECT? O Glutamic acid and asparagine are acidic amino acids Tryptophan and phenylalanine are aromatic amino acids Alanine and valine are neutral amino acids O Lysine and arginine are basic amino acids.

Biology: The Unity and Diversity of Life (MindTap Course List)

14th Edition

ISBN:9781305073951

Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Chapter3: Molecules Of Life

Section: Chapter Questions

Problem 2CT: In 1976, a team of chemists in the United Kingdom was developing new insecticides by modifying...

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Lactose is a disaccharide formed by the formation of a bond between glucose and glycosidic; lactose glycosidic; galactose hydrogen; sucrose hydrogen; fructose
In 1976, a team of chemists in the United Kingdom was developing new insecticides by modifying sugars with chlorine (Cl2), phosgene (Cl2CO), and other toxic gases. One young member of the team misunderstood his verbal instructions to test a new molecule. He thought he had been told to taste it. Luckily for him, the molecule was not toxic, but it was very sweet. It became the food additive sucralose. Sucralose has three chlorine atoms substituted for three hydroxyl groups of sucrose (table sugar): The altered sugar binds so strongly to the sweet-taste receptors on the tongue that the human brain perceives it as 600 times sweeter than sucrose. Sucralose was originally marketed as an artificial sweetener called Splenda, but it is now available under several other brand names. Researchers investigated whether the body recognizes sucralose as a carbohydrate by feeding sucralose labeled with 14C to volunteers. Analysis of the radioactive molecules in the volunteers urine and feces showed that 92.8 percent of the sucralose passed through the body without being altered. Some people are worried that the chlorine atoms impart toxicity to sucralose. How would you respond to that concern?
The major structural differences between cellulose and starch is found in the’ (a) I identify of the monosaccharide units present (b) Ring size of the monosaccharide units present (c) Optical activities of the monosaccharide units presents (d) Linkages between the monosaccharide units present (e) D-and L-designations of the monosaccharide units present
Which of the following statements about monosaccharides is true? A. Monosaccharides are classified according to the location of their carbonyl group. B. The penultimate chiral center of a monosaccharide determines its handedness. C. If the carbonyl group of a monosaccharide is terminal then it will react positively with Barfoed's and Seliwanoff's tests. D. The cyclization of monosaccharides results to the formation of a cyclic ether. E. The existence of anomers is due to the mutarotation along the reference carbon
When disaccharides are heated in the presence of a strong acid, the linkage joining the two monosaccharidestogether is "broken" (hydrolysis reaction). Using this information, explain why sucrose might give a false positiveresult in the Seliwanoff test.Sucrose may give a false positive result in the Seliwanoff test because it is a disaccharide that could break downand the Seliwanoff could react with the monosaccharide components, giving a false positive
A polysaccharide is found in the shells of arthropods (e.g.,lobsters and grasshoppers) and of mollusks (e.g., oysters andsnails). It can be obtained from these sources by soaking theshells in cold dilute hydrochloric acid to dissolve the calciumcarbonate. The threadlike substance formed is composed oflinear long-chain molecules. Hydrolysis with boiling acidgives d-glucosamine and acetic acid in equimolar amounts.Milder enzymatic hydrolysis gives N-acetyl-d-glucosamineas the sole product. The polysaccharide’s linkages are identical to those of cellulose. What is the structure of thispolymer?
Draw the structure and give the systematic name of the given disaccharides. Lactose which is also known as milk sugar: β-D-Gal(1à4)β-D-Glc, where Gal is galactose and Glc is glucose. Sucrose which is also known as table sugar: a-D-Glc (1-->2) b-D-Fru where Glc is glucose and Fru is fructose.
Which of the following describes lactose? A. A nonreducing disaccharide containing glucose and fructose linked by a (α1-->4) bond. B. A reducing disaccharide containing two glucose molecules linked by a (α1-->4) bond. C. A reducing disaccharide containing two glucose molecules linked by a (β1-->4) bond. D. A reducing disaccharide containing galactose and glucose linked by a (β1-->4) bond. E. A nonreducing disaccharide containing galactose and glucose linked by a (α1-->4) bond.
Which of the following shorthand names best characterizes the following disaccharide? a. Glc (β1→4)Gal b. Gal (β1→4)Glc c. Gal (α1→4)Glc d. Glc (α1→4)Gal
1) The smallest monsaccharides that can exist are: a) Pentoses b) Trioses c) Hexoses d) Tetroses 2) The structure of D-galactose differs from that of D-glucose at: a) carbon 1 and carbon 2 b) carbon 6 c) carbon 5 d) carbon 4 4) Which of the following pairs of monosaccharides contain different number of carbon atoms? a) gulose and tagatose b) glucose and galactose c) glyceraldehyde and dihydroxyacetone d) fructose and ribose
Consider each of the following disaccharides: a) Label the acetal and hemiacetal in each disaccharide. b) Number the carbons in each of their monosaccharide rings. c) Classify the glycosidic linkage as α or β and use numbers to designate its location. d) Draw the Fishcher projections of the monosaccharides formed when each of thedisaccharides is hydrolyzed? e) Draw the chair conformation of each monosaccharide, where applicable.
Indicate whether each of the following disaccharides is a reducing (R) or nonreducing (NR) sugar by the criterion of reaction with Fehling’s solution. (a) Glcα(1 → 2)Frucβ (b) Galβ(1 → 4)Glc (c) Glcα(1 → 1)Glcα (d) Glcα(1 → 4)Glc (e) Glcβ(1 → 6)Glc