Quick Biochemistry - Fats And Fatty Acid Metabolism (Section 8)
1
Where does the initial activation of long chain fatty acids to acyl CoA occur?
2
Which molecule facilitates the entry of long chain acyl CoA into mitochondria?
3
What coenzyme is involved in the conversion of Acyl CoA to α-β unsaturated acyl-CoA by acyl-CoA dehydrogenase?
4
What cofactor is essential for the enzyme thiokinase in the activation of long chain fatty acids?
5
ω-oxidation is catalyzed by the hydroxylase in microsomes, utilizing which of the following?
6
What coenzyme is required for the carboxylation of acetyl-CoA to malonyl - CoA?
7
Malonyl-CoA interacts with which functional group?
8
What coenzyme is essential for fatty acid synthesis?
9
Which molecule activates fatty acids to form acyl CoA using the enzyme thiokinase?
10
What process do phospholipids support?
11
What cellular factor experiences significantly reduced function when polyunsaturated fatty acids lack desaturation and chain elongation capabilities?
12
What triggers the release of prostaglandins into the bloodstream?
13
Prostaglandins share a structural foundation derived from prostanoic acid, which features how many carbon atoms?
14
The carbon chains in prostanoic acid are linked in the chain's center by a
15
Every active prostaglandin must have at least one double bond positioned between which locations?
16
In which organ do the enzymatic mechanisms for fatty acid elongation, shortening, saturation, and desaturation primarily occur?
17
Which of the following substances is categorized as an essential fatty acid?
18
In the body, prostaglandins are created from what starting material?
19
Which of the following saturated fatty acids is *not* typically found in a buffer solution?
20
What biological functions do lipids contribute to?
21
What does the saponification number represent?
Answer(C)
The amount of KOH (in mg) needed to counteract the acetic acid from saponifying one gram of acetylated fat.
22
Which characteristics are typical of lipids?
23
In cerebrosides, what kind of carbohydrate is present?
24
Which of these fatty acids lacks unsaturation?
25
Which of the following is NOT a function of prostaglandins?
26
What is the approximate caloric value of lipids per gram?
27
Which fatty acid is found in kerotin?
28
Which of the following is NOT a ketone?
29
Answer(A)
The process of breaking down fats using an alkali.
30
What is measured by the number of milliliters of 0.1 N KOH needed to neutralize fatty acids from 5 grams of fat?
31
What is the approximate hydrated density range of HD lipoproteins?
32
What does the saponification number primarily reflect?
Answer(B)
The average molecular weight of fatty acids
33
Which substance yields a positive result in the acrolein test?
34
What does the iodine number generally quantify?
Answer(A)
The degree of unsaturation
35
Which biomolecule typically yields the greatest amount of energy upon complete oxidation?
36
Lecithins are primarily comprised of which set of components?
Answer(A)
Glycerol + Fatty acids + Phosphoric acid + Choline
37
Besides fatty acids and phosphoric acid, sphingomyelins also contain:
38
What is the main component of the fat stores within mammalian cells?
39
What is the resulting product when ethanolamine replaces choline in lecithin?
40
Which of the following is an example of a hydroxy fatty acid?
41
Which substance reacts positively in the Acrolein test?
42
What causes the unpleasant odor of spoiled fat?
43
What is a key reason for phospholipids' role in cell membranes?
Answer(C)
They have both polar and non polar potions
44
Which of the following is NOT a type of phospholipid?
45
Which fatty acid must be obtained through dietary intake, as it is not produced by the human body?
46
In cephalin's structure, what molecule replaces choline?
47
What enzyme is responsible for breaking down triacyl glycerols within plasma lipoproteins?
48
What describes amphipathic lipids?
49
Which fatty acid is NOT considered an essential fatty acid?
50
What is the approximate energy content of lipids?
