Question 1

Which of the following is the correct shorthand notation for linoleic acid, which contains 18 carbons and two double bonds at positions 9 and 12?

Accepted Answer

$$18:2\ (\$$Delta^{9,12}$$)$$

Question 2

What is the correct systematic name for the fatty acid with the shorthand notation $$16:0$$?

Accepted Answer

Hexadecanoic acid

Question 3

A fatty acid is described as $$18:1\ (\$$Delta^{9}$$). $$Which of the following statements is TRUE about this fatty acid?

Accepted Answer

It has one double bond between carbons 9 and 10.

Question 4

Which of the following fatty acids would have the highest melting point?

Accepted Answer

$$18:0$$

Question 5

Given the shorthand notation $$14:0$$, what is the common name of this fatty acid?

Accepted Answer

Myristic acid

Question 6

Which of the following correctly describes the process for assigning a shorthand name to a fatty acid?

Accepted Answer

Count the total number of carbons, count the number of double bonds, and indicate the position of double bonds.

Question 7

A fatty acid with the shorthand notation $$18:3\ (\$$Delta^{9,12,15}$$) is $$best described as:

Accepted Answer

An omega-3 polyunsaturated fatty acid

Question 8

Which of the following is the correct order of melting points for the following fatty acids (from lowest to highest): $$18:3$$, $$18:2$$, $$18:1$$, $$18:0$$?

Accepted Answer

$$18:3 \u003c 18:2 \u003c 18:1 \u003c 18:0$$

Question 9

If a fatty acid is named $$20:4\ (\$$Delta^{5,8,11,14}$$)$$, how many double bonds does it have and at which positions?

Accepted Answer

Four double bonds at positions 5, 8, 11, and 14

Question 10

Which of the following best explains why unsaturated fatty acids have lower melting points than saturated fatty acids of the same chain length?

Accepted Answer

Double bonds introduce kinks, preventing tight packing of fatty acid chains.

Question 11

Which of the following is the correct shorthand notation for palmitoleic acid?

Accepted Answer

$$16:1\ (\$$Delta^{9}$$)$$

Question 12

A fatty acid is described as $$18:0. $$Which of the following is TRUE?

Accepted Answer

It is a saturated fatty acid with 18 carbons.

Question 13

Which of the following fatty acids is most likely to be solid at room temperature?

Accepted Answer

Stearic acid ($$18:0)$$

Question 14

Which of the following is the correct structure for myristic acid based on its shorthand notation?

Accepted Answer

A 14-carbon saturated fatty acid

Question 15

If a fatty acid is described as $$24:1\ (\$$Delta^{15}$$)$$, what does this indicate about its structure?

Accepted Answer

It has 24 carbons and one double bond at position 15.

Fatty Acid Nomenclature and Structure in Biochemistry

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