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BIOC 385 Exam 2 || with Complete Solutions.
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A defect in which of the following enzymes leads to Tay-Sachs disease? correct answers Hexosamidase A Lipases are water-soluble enzymes in the small intestine that correct answers Hydrolyze triacylglycerols to fatty acids What disease is due to a deficiency in liver glycogen phosphorylase? co...

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  • August 20, 2024
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  • 2024/2025
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BIOC 385 Exam 2 || with Complete Solutions.
A defect in which of the following enzymes leads to Tay-Sachs disease? correct answers
Hexosamidase A

Lipases are water-soluble enzymes in the small intestine that correct answers Hydrolyze
triacylglycerols to fatty acids

What disease is due to a deficiency in liver glycogen phosphorylase? correct answers Hers
disease

What type of fatty acid is most commonly used for biological energy storage? correct answers
Long-chain saturated

What type of fatty acid is most abundantly found in membranes? correct answers saturated fatty
acids

What is a selective inhibitor of COX-2? correct answers Celecoxib

Apolipoproteins are found embedded in which of the following? correct answers Membrane
surrounding chylomicrons

What lipid signaling molecules is NOT derived from cholesterol? Which ones are? correct
answers Not: Eicosanoids
Are: Androgens, estrogens Progesterones

Which of the following is NOT found at elevated levels in lipid rafts? correct answers
Glycerophospholipid

Which of the following IS found at elevated levels in lipid rafts? correct answers Cholesterol,
sphingolipid, transmembrane proteins

Where is the steroid cortisol synthesized? correct answers Adrenal cortex

Which of the following eicosanoids regulates blood vessel constriction? correct answers
Thromboxanes

In animals, triacylglycerols are stored predominantly in what type of cells? correct answers
Adipocytes

What is FALSE concerning tracylglycerol transport? correct answers Triacylglycerols from
adipose tissue are transported as free tracylglycerols

What is the key enzyme for fatty acid metabolism catalyzes the commitment step for fatty acid
synthesis? correct answers Acetyl-CoA carboxylase

, Glycogen _______ uses UDP-glucose as a substrate correct answers synthase

What do liver cells do? correct answers Assemble lipoprotein particles in the endomembrane
system. The particle is then moved by a secretory vesicle to the plasma membrane, where is is
released to be transported to peripheral tissues

B oxidation of an unsaturated fatty acid, as shown int he image, would differ from B oxidation of
a saturated fatty acid of the same carbon number in what way? correct answers The total number
of cofactors reduced in B oxidation of an unsaturated fatty acid is less than in B oxidation of a
saturated fatty acid of the same carbon number.

What depicts an oil and why? correct answers Figure B depicts (one with more interactions) an
oild since there are numerous unsaturated lipids with cis double bonds

Glycogen is a polysaccharide and has many water molecules associated with it due to its polar
nature. Triacylglycerols are nonpolar. What is the relative energy storage density (kJ/g) of
tracylglycerols to glycogen? correct answers Significantly greater, 6:1

Which enzyme is responsible for step 3 of B-oxidation shown? correct answers 3-Hydroxyacyl-
CoA dehydrogenase

Triacylglycerols synthesized in the liver are packaged in which of the following? correct answers
VLDL particles

Which of the following is an example of a monosaturated fatty acid? correct answers Oleate

The most abundant fatty acids in nature consist of unbranched chains of how many carbons?
correct answers 12-20

Which of the following is/are NOT a component of chylomicrons? correct answers Lipase

What is a cerebroside? correct answers Sphingolipids consist of a fatty acid attached ot
sphinogosine. The addition of head groups distinguishes the different types. Cerebrosides have a
single sugar attached as the head group

What are the products from fatty acid oxidation of palmitate? correct answers 8 acetyl-CoA, 7
NADH, and 7 FADH2. Once molecule of ATP is consumed, resulting in the production of 1
AMP

For glycogen synthesis, glucose is activated by what molecule being attached at the C-1
position? correct answers UDP

Which form of glucose is required by UDP-glucose pyrophosphorylase? correct answers
Glucose-1-P

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