Question 1

Which of the following explains how phosphatidylserine is synthesized?

Accepted Answer

A)  Serine displaces the ethanolamine from a phosphatidylethanolamine . 
B)  Serine reacts with a diacylglycerol pyrophosphate. 
C)  CDP-serine reacts with diacylglycerol. 
D)  Serine reacts with a CDP-diacylglycerol. 
E)  The ethanolamine group of phosphatidylethanolamine is carboxylated to form serine. 
A)  Serine displaces the ethanolamine from a phosphatidylethanolamine . 
B)  Serine reacts with a diacylglycerol pyrophosphate. 
C)  CDP-serine reacts with diacylglycerol. 
D)  Serine reacts with a CDP-diacylglycerol. 
E)  The ethanolamine group of phosphatidylethanolamine is carboxylated to form serine. A

Question 2

The synthesis of triacylglycerols involves the addition of acyl groups to glycerol-3-phosphate. What is the source of the acyl groups?

Accepted Answer

A)  free fatty acid 
B)  fatty acid attached to the acyl carrier protein 
C)  fatty acyl adenylate 
D)  acyl-carnitine 
E)  fatty acyl-CoA 
A)  free fatty acid 
B)  fatty acid attached to the acyl carrier protein 
C)  fatty acyl adenylate 
D)  acyl-carnitine 
E)  fatty acyl-CoA E

Question 3

A _____ becomes a _____ through loss of cholesterol to tissue.
Dropdown 1: chylomicron, VLDL, LDL, HDL
Dropdown 2: chylomicron, VLDL, LDL, HDL

Accepted Answer

VLDL,LDL

Question 4

The hydrolysis of triacylglycerols stored in adipose tissue is catalyzed by the enzyme _____, often signaled by lipolytic hormones such as the catecholamines.

Accepted Answer

A)  hormone-sensitive lipase 
B)  lipoprotein lipase 
C)  albumin-associated lipase 
D)  chylomicron lipase 
E)  adipocyte lipase 
A)  hormone-sensitive lipase 
B)  lipoprotein lipase 
C)  albumin-associated lipase 
D)  chylomicron lipase 
E)  adipocyte lipase

Question 5

The glycerol backbone of triacylglycerols is catabolized to _____.

Accepted Answer

dihydroxya

Question 6

To oxidize the fatty acids in a triacylglycerol, what must occur first?

Accepted Answer

A)  fatty acid activation 
B)  lipolysis 
C)  transport into the mitochondria 
D)  oxidation of a carbon-carbon single bond to an alkene 
E)  none of the above 
A)  fatty acid activation 
B)  lipolysis 
C)  transport into the mitochondria 
D)  oxidation of a carbon-carbon single bond to an alkene 
E)  none of the above

Question 7

What is used to activate phosphoethanolamine prior to reaction with a diacylglycerol?

Accepted Answer

A)  ATP 
B)  CTP 
C)  GTP 
D)  TTP 
E)  UTP 
A)  ATP 
B)  CTP 
C)  GTP 
D)  TTP 
E)  UTP

Question 8

Which of the following commonly occurs before cholesterol is packaged into a VLDL?

Accepted Answer

A)  oxidation to increase water solubility 
B)  esterification with a fatty acid 
C)  phosphorylation by ATP 
D)  hydration of the alkene 
E)  all of the above may occur 
A)  oxidation to increase water solubility 
B)  esterification with a fatty acid 
C)  phosphorylation by ATP 
D)  hydration of the alkene 
E)  all of the above may occur

Question 9

Free fatty acids bind to _____ for circulation in the bloodstream.

Accepted Answer

The answer of Free fatty acids bind to _____ for...

Question 10

______ are the lipids that are most abundant even though they are not components of membranes.

Accepted Answer

The answer of ______ are the lipids that are most...

Question 11

Cells may take up _____ by receptor mediated endocytosis.

Accepted Answer

The answer of Cells may take up _____ by receptor...

Question 12

Which of the following best describes the sequence of events for the synthesis of phosphatidylcholine?

Accepted Answer

A)  phosphocholine condenses with glycerol-3-phosphate, then two fatty acids are added 
B)  CDP-choline reacts with a monoacylglycerol followed by fatty acid addition 
C)  a diacylglycerol pyrophosphate reacts with choline 
D)  CDP-choline reacts with a diacylglycerol 
E)  none of the above 
A)  phosphocholine condenses with glycerol-3-phosphate, then two fatty acids are added 
B)  CDP-choline reacts with a monoacylglycerol followed by fatty acid addition 
C)  a diacylglycerol pyrophosphate reacts with choline 
D)  CDP-choline reacts with a diacylglycerol 
E)  none of the above

Question 13

Which two molecules are used in the synthesis of sphingosine?

Accepted Answer

A)  arachidonic acid and serine 
B)  stearic acid and isoprene 
C)  palmitoyl-CoA and choline 
D)  linoleoyl-CoA and isoprene 
E)  palmitoyl-CoA and serine 
A)  arachidonic acid and serine 
B)  stearic acid and isoprene 
C)  palmitoyl-CoA and choline 
D)  linoleoyl-CoA and isoprene 
E)  palmitoyl-CoA and serine

Question 14

Lipoproteins formed in the intestinal mucosal cells are called _____.

Accepted Answer

The answer of Lipoproteins formed in the intestinal mucosal cells...

Question 15

Cholesterol and other lipids are transported from tissues to the liver by _____.

Accepted Answer

The answer of Cholesterol and other lipids are transported from...

Question 16

Which of the lipoproteins is responsible for removing cholesterol from cells?

Accepted Answer

A)  chylomicron 
B)  VLDL 
C)  LDL 
D)  HDL 
E)  VHDL 
A)  chylomicron 
B)  VLDL 
C)  LDL 
D)  HDL 
E)  VHDL

Question 17

Which of the following best describes the order for the conversion of glycerol-3-phosphate into a triacylglycerol?

Accepted Answer

A)  1 phosphatase reaction, then 3 acyltransferase reactions 
B)  1 acyltransferase reaction, 1 phosphatase reaction, then 2 more acyltransferase reactions 
C)  2 acyltransferase reactions, 1 phosphatase reaction, then 1 acyltransferase reaction 
D)  3 acyltransferase reactions, then 1 phosphatase reaction 
E)  1 acyltransferase reaction, 1 phosphatase reaction, 1 acyltransferase reaction, 1 phosphatase reaction, then 1 acyltransferase reaction 
A)  1 phosphatase reaction, then 3 acyltransferase reactions 
B)  1 acyltransferase reaction, 1 phosphatase reaction, then 2 more acyltransferase reactions 
C)  2 acyltransferase reactions, 1 phosphatase reaction, then 1 acyltransferase reaction 
D)  3 acyltransferase reactions, then 1 phosphatase reaction 
E)  1 acyltransferase reaction, 1 phosphatase reaction, 1 acyltransferase reaction, 1 phosphatase reaction, then 1 acyltransferase reaction

Question 18

Which of the following terms describes all glycerophospholipid?

Accepted Answer

A)  zwitterionic 
B)  amphipathic 
C)  nonpolar 
D)  amphoteric 
E)  none of the above 
A)  zwitterionic 
B)  amphipathic 
C)  nonpolar 
D)  amphoteric 
E)  none of the above

Question 19

The movement of _____ into a cell occurs by endocytosis following _____.
Dropdown 1: VLDL, LDL
Dropdown 2: binding of LDL to the LDL receptor, oxidation of the LDL particle, removal of triacylglycerols from the VLDL

Accepted Answer

LDL,bindin

Question 20

Three of the key events in atherosclerosis are lipid accumulation on arterial walls, inflammation, and calcification.

Accepted Answer

A) True 
 B)False

Exam 10: Lipids II

Which of the following explains how phosphatidylserine is synthesized?

The synthesis of triacylglycerols involves the addition of acyl groups to glycerol-3-phosphate. What is the source of the acyl groups?

A _____ becomes a _____ through loss of cholesterol to tissue. Dropdown 1: chylomicron, VLDL, LDL, HDL Dropdown 2: chylomicron, VLDL, LDL, HDL

The hydrolysis of triacylglycerols stored in adipose tissue is catalyzed by the enzyme _____, often signaled by lipolytic hormones such as the catecholamines.

The glycerol backbone of triacylglycerols is catabolized to _____.

To oxidize the fatty acids in a triacylglycerol, what must occur first?

What is used to activate phosphoethanolamine prior to reaction with a diacylglycerol?

Which of the following commonly occurs before cholesterol is packaged into a VLDL?

Free fatty acids bind to _____ for circulation in the bloodstream.

______ are the lipids that are most abundant even though they are not components of membranes.

Cells may take up _____ by receptor mediated endocytosis.

Which of the following best describes the sequence of events for the synthesis of phosphatidylcholine?

Which two molecules are used in the synthesis of sphingosine?

Lipoproteins formed in the intestinal mucosal cells are called _____.

Cholesterol and other lipids are transported from tissues to the liver by _____.

Which of the lipoproteins is responsible for removing cholesterol from cells?

Which of the following best describes the order for the conversion of glycerol-3-phosphate into a triacylglycerol?

Which of the following terms describes all glycerophospholipid?

The movement of _____ into a cell occurs by endocytosis following _____. Dropdown 1: VLDL, LDL Dropdown 2: binding of LDL to the LDL receptor, oxidation of the LDL particle, removal of triacylglycerols from the VLDL

Three of the key events in atherosclerosis are lipid accumulation on arterial walls, inflammation, and calcification.

The Chemical Foundations of Biochemistry

Nucleic Acids

Proteins I

Proteins Iienzymes

Membranes and an Introduction to Signal Transduction

Carbohydrates I

The Common Catabolic Pathway

Carbohydrates II

Lipids I

Amine Metabolism

Metabolism Integration

Nucleotide Deoxynucleotide Metabolism

Dna Replication, Damage and Repair

Rna Synthesis

Protein

Control of Gene

Determination of Macromolecular Structure

Allosterism and Receptor-Ligand

Designer Proteins and Protein Folding

Biomolecule Purification

Bioinformatics and Omics

Signal

Protein Trafficking

Photosynthesis Nitrogen

Filters

A _ becomes a _ through loss of cholesterol to tissue. Dropdown 1: chylomicron, VLDL, LDL, HDL Dropdown 2: chylomicron, VLDL, LDL, HDL

The movement of _ into a cell occurs by endocytosis following _. Dropdown 1: VLDL, LDL Dropdown 2: binding of LDL to the LDL receptor, oxidation of the LDL particle, removal of triacylglycerols from the VLDL