Biochemistry
9th Edition
ISBN: 9781319114671
Author: Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher: W. H. Freeman
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Chapter 11, Problem 22P
Interpretation Introduction
Interpretation:
The difference in the structures of glycogen and cellulose needs to be explained.
Concept introduction:
Carbohydrates are available in various forms like starch, cellulose, glycogen etc. They all are polysaccharides which contribute as an energy source in plants and animals. The human body needs sufficient intake of sugar or glucose which is an energy source of human cells. Glycogen and cellulose are the polysacchrides formed by sugar molecules called glucose. They are a good source of energy.
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This is DNA. Locate the nitrogen bases (nitrogens are blue). Where are they located in the molecule?Locate the sugars and phosphates, and describe their location. Adjacent nucleotides are linked by covalent phosphodiester bonds (-O-P-O-) produced by a condensation reaction. What parts of the adjacent nucleotides are linked by phosphodiester bonds?Two nitrogenous bases extending towards the middle of the double helix. Are there any covalent bonds between these bases?If there are no covalent bonds between these bases, what other kinds of bonds might hold the two strands of the double helix together?
R
V. Phospholipids are the main structural lipids that
comprise cellular and organellar membranes. One
abundant phospholipid in bacterial cell membranes is
phosphatidylethanolamine (PE), which has a
generic structure shown on the right. Note that R1 R
and R2 are representative alkyl chains of attached
fatty acids, each having about 16 – 20 carbon atoms.
a) The overall net charge in one PE molecule is:
-2 -1 0 +1 +2
CH₂
Phosphatidylethanolamine
(PE)
-CH
H₂C.
b) The glycerophosphate backbone in PE is a:
D-enantiomer
c) The fatty acids are attached to PE via which type of bond? amine
L-enantiomer
racemic
NH3
amide ester ether
d) Draw the commonly used cartoon
representation of one phospholipid molecule.
Label the hydrophilic and hydrophobic parts.
Н.
Based on what you know about the
classification and structure of galactose, HO-
what possible results would you obtain if
H-
ОН
Но-
H-
H.
но-
you were to perform the following tests?
(+)
negative (-) and explain in one sentence)
ОН
(indicate
whether
positive
or
ČH2OH
Test
Result
Explanation
Benedict's
Barfoed's
Seliwanoff's
lodine Test
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Chapter 11 Solutions
Biochemistry
Ch. 11 - Prob. 1PCh. 11 - Prob. 2PCh. 11 - Prob. 3PCh. 11 - Prob. 4PCh. 11 - Prob. 5PCh. 11 - Prob. 6PCh. 11 - Prob. 7PCh. 11 - Prob. 8PCh. 11 - Prob. 9PCh. 11 - Prob. 10P
Ch. 11 - Prob. 11PCh. 11 - Prob. 12PCh. 11 - Prob. 13PCh. 11 - Prob. 14PCh. 11 - Prob. 15PCh. 11 - Prob. 16PCh. 11 - Prob. 17PCh. 11 - Prob. 18PCh. 11 - Prob. 19PCh. 11 - Prob. 20PCh. 11 - Prob. 21PCh. 11 - Prob. 22PCh. 11 - Prob. 23PCh. 11 - Prob. 24PCh. 11 - Prob. 25PCh. 11 - Prob. 26PCh. 11 - Prob. 27PCh. 11 - Prob. 28PCh. 11 - Prob. 29PCh. 11 - Prob. 30PCh. 11 - Prob. 31PCh. 11 - Prob. 32PCh. 11 - Prob. 33PCh. 11 - Prob. 34PCh. 11 - Prob. 35PCh. 11 - Prob. 36PCh. 11 - Prob. 37PCh. 11 - Prob. 38PCh. 11 - Prob. 39P
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- The diversity of functional groups on sugars that can form glycosidic bonds greatly increases the information content of glycans relative to oligopeptides. Consider three amino acids, A, B, and C. How many tripeptides can be formed from one molecule of each amino acid? Now consider three sugars- glucose, glucuronic acid, and N-acetylglucosamine. Use shorthand (eg., Glca(1 → 4)GICUAB(1 → 4)GICNAC) to represent 10 trisaccharides with the sequence Glc-GlcUA-GluNAc. Is your list exhaustive?arrow_forwardwhat are the formal chemical names for sucrose,lactose and maltose? ex. celllubiose is B-D-Glucopyranosyl1-(1->4)-B-D-glucopyranose. how do you get the answer?arrow_forwardBriefly describe the structural differences for each pair listed: A) Glycogen and Cellulose B) Lactose and Sucrosearrow_forward
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