Fill in the blank.

Fatty acids ___.

A)can be branched or unbranched.
B) are referred to as "saturated" if they have one or more C–C double bonds.
C) are highly oxidized storage forms of hydrocarbons.
D) by definition, never exceed 20 carbons in length.

Triacylglycerols _.

A) always have at least one fatty acid with a trans double bond.
B)consist of glycerol and three different fatty acids.
C) are a major energy storage form.
D) consist of glycerol and three identical fatty acids.

Mass spectrometry _____.

A)can be used to identify individual lipids in complex mixtures.
B)cannot be used with lipids other than fatty acids.
C)can determine the mass but not the identity of a lipid.
D) cannot determine the locations of double bonds in a fatty acid.

Which statement is true?

A) Prostaglandins are found only in the prostate gland.
B) Vitamin E is a hormone precursor.
C) Vitamin D regulates milk production in mammary glands.
D) Membrane sphingolipids can be used to produce intracellular messengers.

branched fatty acid (BCFA) usually contain one or more methyl group on the carbon chain , mostly found in bacteria as component of membrane lipids while unbrached are straight chain saturated or unsaturated fatty acids.

Triacylglycerol is made up of glcerol esterified to three molecules of same or different fatty acids. it serve as the storageform of fatty acid in the adipose tissues. it is usually mobilized for usage through an hormone triggered process

Mass spectrometry is a seperation technique used to quantify and identify unknown compounds within a sample by differentiating gaseous ion in an electric field and magnetic field according to their mass to charge ratios

sphingolipids are lipids containing the alcohol; sphingosine. They serve as intracellular second messengers and extracellular mediator