Answer the ff. questions:1. What is the physiological significance ofbranching in polysaccharides?2. Discuss briefly the cause of lactoseintolerance.3. Why humans do not have the capacity todigest cellobiose or cellulose?4. What is the difference between acarbohydrate and sugar?

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Answered: 1. What is the physiological…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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10. Briefly describe and draw the structure of these polysaccharides based on glucose or another monosaccharide. List the typical molecular weight range expected for each. Draw enough of each structure so that you can differentiate a-1,4, α-1,6 and 3-1,4 linkages. You may also draw schematics or add a description to distinguish the differences in the structures. A. amylose B. amylopectin C. glycogen D. cellulose E. pectin
6.
27. Which correctly describes the furanose form of a monosaccharide? b) c) d) e) six-sided ring structure with five carbon atoms and one oxygen atom boat conformation of a monosaccharide, not the chair conformation linear structure of a monosaccharide, not the cyclic structure five-sided cyclic structure with four carbon atoms and one oxygen atom chemical derivatives of monosaccharides, such as amino sugars with an amino group attached In aqueous solution, monosaccharides such as glucose can exist as cyclic or linear structures. The percentage of monosaccharides that are in the cyclic form is: móre than 99 % b) 50 % 10 % d) 5% much less than 1% The monosaccharide structure shown here is: HOH,C он a) CH,OH но a-fructose b) c) d) e) B-ribose B-fructose a-galactose B-glucose HO Which of the molecules below is cellobiose, a breakdown product of cellulose? a) glucose-a-1,4-glucose glucose-a-1,2-fructose glucose-ß-1,4-glucose galactose-B-1,4-glucose glucose-a-1,6-glucose
6. A control phospholipid membrane is isolated in which the phospholipid tails all have an 18-C chain length and are comprised of a 50:50 mixture of saturated and unsaturated tails. In addition, about 25% of the lipids are fluorescently labeled on the head groups. a) Draw a single plot of Fluidity vs. Temperature that contains the expected curves for: Control phospholipid (line- -) Control supplemented with 18-C saturated phospholipids (dashed line - Control supplemented with 16-C chain length (dotted line • • • • • • ) b) Draw a single plot of the Fluorescence Intensity vs. Time that contains the expected curves of a Fluorescence Recovery After Photobleaching (FRAP) using the same samples as in (a) above. The FRAP experiment is conducted at the same temperature for each sample (which is the Tm of the of the control phospholipid).
Please help answer the question on natural polymers polysaccharides 1) compare and contrast the structure and function of startch and glycogen proteins 1) sketch the two amino acids. Contrast the polarity of the side chains Dna 1) what are the predominant groups in dna 2) the covalent linkage between nucleotides is called a phosphodiester bond. Sketch the linkage
1. Theoretically, a protein could assume a virtually infinite number of configurations and conformations. Suggestseveral features of proteins that drastically limit the actual number. 2. What are the greatest structural features that differentiate sphingolipids from phosphoglycerides? 3. High levels of glucose-6-phosphate inhibit glycolysis. If the concentration of glucose-6-phosphate decreases,activity is restored. Why?
13. Which statement(s) correctly describe this disaccharide? CH2OH CH2OH A. It's the alpha anomer, and it's a reducing sugar. CH-O CH-O OH B. It's the alpha anomer, and it's a nonreducing sugar. CH CH CH CH OH C. It's the beta anomer, and it's a reducing sugar. ОН СН—СH CH-CH D. It's the beta anomer, and it's a nonreducing sugar. OH OH OH
16. Name the type of biomolecules shown below:
9. a) Nucleic acids, proteins, and polysaccharides all share a similar structure. How is the structure of lipids different from these macromolecules?
17.
3. Which best describes the contribution of tertiary (3’) structure of to the native conformation of polypeptides and proteins: a) Structure that results from intrachain interactions of amino acid side chains b) Structure that results from interchain interactions of amino acid side chains c) Structure that results from base pairing d) Structure that results from the linear sequence of amino acids from beginning to end of molecule
4. Molecule #4 a)What Group? (Carb, Lipid, Protein, or Nucleic Acid). b)Within the group, how would you classify it? a) -NH b) "NH2 но-р-о онон c)How do you know you correctly classified this macromolecule in its proper group? O=a-o

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1. What is the physiological significance of branching in polysaccharides?