Concept explainers
Interpretation:
The isoprene units has to be marked in lycopene and
Concept Introduction:
Terpenes are made by joining five-carbon units, usually in a head to tail-fashion.
Monoterpenes are those terpenes with two isoprene units-have 10 carbons, sesquiterpenes have 15 carbons, diterpenes have 20 carbons, triterpenes have 30 carbons and tetraterpenes have 40 carbons.
Isopentenyl pyrophosphate is the five-carbon compound used for the biosynthesis of terpenes.
According to the isoprene rule, the isoprene units are terpenoids joined by head to tail linkage or 1-4-linkage.
Want to see the full answer?
Check out a sample textbook solutionChapter 25 Solutions
Organic Chemistry; Modified MasteringChemistry with Pearson eText -- ValuePack Access Card; Study Guide and Student Solutions Manual for Organic Chemistry, Books a la Carte Edition (7th Edition)
- Draw a structure for 4-bromo-2-pentene where the double bond has a Z geometry and the chiral carbon an S configuration.arrow_forwardThe structural formula for the open-chain form of D-mannose is CH НО—С—Н Но-с—н Н—С—ОН Н—ҫ—ОН CH-OН (a) Is this molecule a sugar? (b) How many chiral carbons are present in the molecule? (c) Draw the structure of the six-member-ring form of this molecule.arrow_forwardCertain omega-3 fatty acids can be found only in animal sources, such as fatty fish. Two of these are eicosapentaenoic acid (EPA) [20:5] and docosahexaenoic acid (DHA) [22:6], both of which are ω-3 fatty acids. DHA has been shown to be important in healthy brain development, so it has recently been added to infant formulas. Breast milk is rich in DHA as long as the mother maintains a healthy diet that includes fish. Draw skeletal structures of the fatty acids EPA and DHA.arrow_forward
- Name all the functional groups of highly branched isoprenoids. Point out chiral centers and/or cis/trans double bonds if there are any and explain the significance of these structural components.arrow_forwardCalculate the heat of hydrogenation of ethane, C2H4arrow_forwardHO-CH–CH=CH-(CH2)12-CH3 CH2 CH2 CH2 CH2 CH2 CH2 CH2 CH-NH-Ĉ–CH2 `CH2 `CH2 °CH2 `CH2 `CH2 `CH2 `CH2 || CH2-OH The structure above is consistent with what class of lipids? O Glycolipids Glycerophospholipids Sphingolipids none of the above O O O Oarrow_forward
- Which of the following structures is a 20:2 (Δ11,16) fatty acid? a. CH3(CH2)9CH=CH(CH2)3CH=CH(CH2)2COOHb. CH3(CH2)2CH=CH(CH2)3CH=CH(CH2)9COOHc. CH3(CH2)10CH=CH(CH2)3CH=CHCH2COOHd. CH3CH2CH=CH(CH2)3CH=CH(CH2)10COOHarrow_forwardXylulose has the following structural formula. To what carbohydrate class does xylulose belong based on the number of carbons and carbonyl functionality? A) aldotetrose B) aldopentose C) ketotetrose D) ketopentose E) ketohexosearrow_forwardThe following are the pigments of spinach. Please rank them according to their polarity. Beta-carotene Pheophytin a Pheophytin b Chlorophyll a Chlorophyll b Xanthophyllarrow_forward
- Analyze the following structure of limonene in terms of isoprene units joined by head-to-tail linkages. (1) How many isoprene units are there in a limonene molecule? (2) Classify limonene as a monoterpene (one terpene unit), a sesquiterpene (1.5 terpene units), or a diterpene (2 terpene units).arrow_forwardThe structural formula for the open-chain form of galactose is CH Н—ҫ—ОН Но—С—н НО—С—Н Н—ҫ—ОН CH-ОН (a) Is this molecule a sugar? (b) How many chiral carbons are present in the molecule? (C) Draw the structure of the six-member-ring form of this molecule.arrow_forwardwhat is the structure of hexane / ethyl acetate 1: 1?arrow_forward
- Introduction to General, Organic and BiochemistryChemistryISBN:9781285869759Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar TorresPublisher:Cengage Learning