25) Below are two amino acids: cysteine and histidine.a) Draw the reaction mechanism of a dehydration synthesis reaction between cysteine andhistidine below:HSHProduct 1OHoxHNHb) Draw two different products of the dehydration synthesis reaction from part a). Prove thatthese are two different products by labelling the N and C termini, peptide bond, and R-groups ofeach product.Product 2OH

A peptide bond is formed between the carboxyl group of N-terminal amino acid residue and the amino…

Answered: 25) Below are two amino acids: cysteine…

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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Indicate next to each letter the name of the monomers shown below and write the name of the polymer that is produced from the monomer. H-C-OH HỌ-C-H H-C-OH H-C-OH о- 6 CH₂OH 0=P-O О CH₂ Phosphate H group А: Name of polymer: H- Н Н OH H Sugar Н Н. H Nitrogenous base (adenine) C: 0 НО Name of polymer: H C-C-N CH2 SH Н НИ Н III H-N-С-С-0 +111 НКН н B: Name of polymer: Н 0 0-C-H o Н-С-0² H-C-O H S ННННННННННН Н Н Н LI -CH Н ННННННННННН Н Н Н ITIILE I C-C H ...... С-с-с-с-с-с-с III E .. ННННННННННН Н Н С-С-f 111 1 FE D: I НННННННННННННН No polymer!
16. Name the type of biomolecules shown below:
1. Write the formula for the conjugate base for each of the following acids: а) НCO b) НРО c) HBRO
1. Draw the tetrapeptide Met-Ala-Thr-Thr at a ph of 7? 2. Draw the tetrapeptide Met-Ala-Thr-Thr at a ph of 12?
PC 4.5.1
1. Examine the synthetic glycoprotein, Molecule A, shown below: Protein- OH OH OH OH OH ÓH OH Molecule A OH Draw the structures of the products obtained when Molecule A reacts under the following conditions. Justify your answer. If no reaction occurs, explain why. The monosaccharide rings that have not reacted may be represented by an “R" group. Mechanisms are not required. (а) Ammonium Carbonate, 5 days. (b) Excess Sodium Periodate. (c) 2,3-dinitrophenyl hydrazine under reductive amination conditions. NO2 O2N. „NHNH2 2,3-dinitrophenyl hydrazine
13
Name the nitrogenous bases that are bonded
1. Make a series (at least 3) of drawings to show the three dehydration synthesis reactions that take place between the two Fatty Acids, the Phosphate Head and the Glycerol. Show the water molecules made. a) Label the following on the completed phospholipid: hydrophilic and hydrophobic parts of the molecule, fatty acids, phosphate group, and glycerol. b) Compare the structure of the phospholipid to that of a triglyceride. How are the two molecules Similar? How are they different? 2. Use the following vocabulary to label and draw a cell membrane: cytoplasm (cell lumen) extra-cellular fluid hydrophobic hydrophilic polar head non-polar tails a) How many O-H groups are there? And are the O-H areas of sucrose polar or non-polar? b) What is the term that is used to discuss how tightly or loosely an atom's nucleus has a hold of its valence electrons?
6. Which class or reactions results in the degradation of all macromolecules: a) dehydration synthesis of monomersà polymers with the loss of an H2O with the addition of each monomer b) hydrolysis with the addition of one H2O for each reaction c) oxidation with the loss of an e- d) reduction with the gain of an e-
1. (a) Arrange the following lipid molecules in the order of their relative melting points. Н.С — о-С-R Н.С — о-С-R H,C -0-ć- | НС —0—С-R НС —о-с-R' НС —о-с-R" H2C -0-Ċ-R H2C -0-C-R H2C -0-ċ-R" VI VII VIII (-olx). 0-ċ-R 180 —о-с-R 18-1 cisÃ9 -ċ-R") = 18:1transA9 (b) Give your reasons for your answer. (c) On heating lipid VI with aqueous NAOH, all the ester linkages were hydrolyzed. Draw the structure of each product of the hydrolysis. (e) Giving a reason for your answer, predict what would happen to the solubility of these products in water if, after the hydrolysis, excess acid was added to the medium to acidify it.
Identify the components of an amino acid in the following diagram. (a) ______________ (b) ______________ (c) ______________ (d) ______________

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25) Below are two amino acids: cysteine and histidine. a) Draw the reaction mechanism of a dehydration synthesis reaction between cysteine and histidine below: HS je os OH HN H 'Н 'OH