Figure 1 shows the melting temperature vs chain length of stearic acid, i.e. octadecanoic acid. 90 - Stearic acid 70 60 - S0 - 40 30 Room temperature 20 10 -10 -20 4 6 8 10 12 14 16 18 20 22 24 Number of carbon atoms Figure 1 (i) What is the appearance of stearic acid at room temperature? (ii) Where would the melting temperatures of the following fatty acids, oleic acid (cis-9- Octadecenoic), linoleic acid (cis,cis-9,12-Octadecadienoic), and linolenic acid (All cis- 9,12,15-Octadecatrienoic), fall on the Figure 1? Plot and indicate their relative locations. Briefly explain why.

Figure 1 shows the melting temperature vs chain length of stearic acid, i.e. octadecanoic acid. 90 - Stearic acid 70 60 - S0 - 40 30 Room temperature 20 10 -10 -20 4 6 8 10 12 14 16 18 20 22 24 Number of carbon atoms Figure 1 (i) What is the appearance of stearic acid at room temperature? (ii) Where would the melting temperatures of the following fatty acids, oleic acid (cis-9- Octadecenoic), linoleic acid (cis,cis-9,12-Octadecadienoic), and linolenic acid (All cis- 9,12,15-Octadecatrienoic), fall on the Figure 1? Plot and indicate their relative locations. Briefly explain why.

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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Concept explainers

Metabolic pathways

Metabolism is defined as the group of life-supporting, enzyme-mediated chemical reactions in organisms. A metabolic pathway is a set of these chemical reactions that involve anabolism (synthesis of complex biomolecules) and catabolism (breakdown of biomolecules into small molecules) that occur inside a cell. Metabolites are the reacting substances, products, and intermediate substances of an enzymatic process that are altered by a series of chemical events catalyzed by enzymes.

Question

Figure 1 shows the melting temperature vs chain length of stearic acid, i.e. octadecanoic acid.
90
80
- Stearic acid
70
60
40
30
Room temperature
20
10
-10
-20
4 6 8 10 12 14 16 18 20 22 24
Number of carbon atoms
Figure 1
(i)
What is the appearance of stearic acid at room temperature?
(ii)
Where would the melting temperatures of the following fatty acids, oleic acid (cis-9-
Octadecenoic), linoleic acid (cis,cis-9,12-Octadecadienoic), and linolenic acid (All cis-
9,12,15-Octadecatrienoic), fall on the Figure 1? Plot and indicate their relative
locations. Briefly explain why.
Temperature ("C)

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