Question 1

Most sphingolipids are glycolipids.However, there is one sphingolipid that contains phosphate but no carbohydrate.This lipid is:

Accepted Answer

A) Ceramide. 
B) Sphingomyelin. 
C) Ganglioside. 
D) Sphingosine. 
E) Cerebroside. 
A) Ceramide. 
B) Sphingomyelin. 
C) Ganglioside. 
D) Sphingosine. 
E) Cerebroside. B

Question 2

The fluidity of biological membranes depends on temperature and lipid composition.Because membrane fluidity has to be maintained in an optimal range, you can expect that, in comparison with tropical fish, the biological membranes of cold-water fish have:

Accepted Answer

A) A higher proportion of polyunsaturated fatty acids. 
B) A higher sphingomyelin/lecithin ratio. 
C) A higher cholesterol content. 
D) A higher content of saturated fatty acids. 
E) A higher glycolipid content. 
A) A higher proportion of polyunsaturated fatty acids. 
B) A higher sphingomyelin/lecithin ratio. 
C) A higher cholesterol content. 
D) A higher content of saturated fatty acids. 
E) A higher glycolipid content. A

Question 3

Of the following compounds, the one that is most likely to diffuse across a lipid bilayer by passive diffusion is:

Accepted Answer

A) Ethanol. 
B) Serum albumin. 
C) Glucose. 
D) Glycine. 
E) Sodium ions. 
A) Ethanol. 
B) Serum albumin. 
C) Glucose. 
D) Glycine. 
E) Sodium ions. A

Question 4

How do most integral membrane proteins interact with the lipid bilayer?

Accepted Answer

A) By covalent attachment to a glycosylphosphatidylinositol anchor. 
B) Through covalently bound fatty acids. 
C) By electrostatic interactions with the head groups of membrane lipids. 
D) By a little piece of hydrophobic a helix that traverses the lipid bilayer. 
E) By hydrogen bonds with the head groups of membrane lipids. 
A) By covalent attachment to a glycosylphosphatidylinositol anchor. 
B) Through covalently bound fatty acids. 
C) By electrostatic interactions with the head groups of membrane lipids. 
D) By a little piece of hydrophobic a helix that traverses the lipid bilayer. 
E) By hydrogen bonds with the head groups of membrane lipids.

Question 5

The mechanism that absorbs glucose from the intestinal lumen can be characterized as:

Accepted Answer

A) Electroneutral. 
B) Facilitated diffusion. 
C) Secondary active transport. 
D) Antiport. 
E) Passive diffusion. 
A) Electroneutral. 
B) Facilitated diffusion. 
C) Secondary active transport. 
D) Antiport. 
E) Passive diffusion.

Question 6

The sodium-potassium ATPase is one of the major energy consumers in the human body.Which other active transport process in the human body uses a mechanism similar to that of the sodium-potassium ATPase?

Accepted Answer

A) The reabsorption of amino acids in the renal tubules. 
B) Uptake of amino acids into the brain through the blood-brain barrier. 
C) Transport of calcium into the sarcoplasmic reticulum. 
D) Glucose uptake by erythrocytes. 
E) Absorption of chloroform by the lung alveoli. 
A) The reabsorption of amino acids in the renal tubules. 
B) Uptake of amino acids into the brain through the blood-brain barrier. 
C) Transport of calcium into the sarcoplasmic reticulum. 
D) Glucose uptake by erythrocytes. 
E) Absorption of chloroform by the lung alveoli.

Most sphingolipids are glycolipids.However, there is one sphingolipid that contains phosphate but no carbohydrate.This lipid is:

The fluidity of biological membranes depends on temperature and lipid composition.Because membrane fluidity has to be maintained in an optimal range, you can expect that, in comparison with tropical fish, the biological membranes of cold-water fish have:

Of the following compounds, the one that is most likely to diffuse across a lipid bilayer by passive diffusion is:

How do most integral membrane proteins interact with the lipid bilayer?

The mechanism that absorbs glucose from the intestinal lumen can be characterized as:

The sodium-potassium ATPase is one of the major energy consumers in the human body.Which other active transport process in the human body uses a mechanism similar to that of the sodium-potassium ATPase?

Introduction to Biomolecules

Introduction to Protein Structure

Oxygen Transporters: Hemoglobin and Myoglobin

Enzymatic Reactions

Coenzymes

DNA, RNA, and Protein Synthesis

The Human Genome

Protein Targeting

Introduction to Genetic Diseases

Viruses

DNA Technology

The Cytoskeleton

The Extracellular Matrix

Plasma Proteins

Extracellular Messengers

Intracellular Messengers

Cellular Growth Control and Cancer

Digestive Enzymes

Introduction to Metabolic Pathways

Glycolysis, Tricarboxylic Acid Cycle, and Oxidative Phosphorylation

Carbohydrate Metabolism

The Metabolism of Fatty Acids and Triglycerides

The Metabolism of Membrane Lipids

Lipid Transport

Amino Acid Metabolism

Heme Metabolism

The Metabolism of Purines and Pyrimidines

Vitamins and Minerals

Integration of Metabolism

Filters

Exam 12: Biological Membranes

Most sphingolipids are glycolipids.However, there is one sphingolipid that contains phosphate but no carbohydrate.This lipid is:

The fluidity of biological membranes depends on temperature and lipid composition.Because membrane fluidity has to be maintained in an optimal range, you can expect that, in comparison with tropical fish, the biological membranes of cold-water fish have:

Of the following compounds, the one that is most likely to diffuse across a lipid bilayer by passive diffusion is:

How do most integral membrane proteins interact with the lipid bilayer?

The mechanism that absorbs glucose from the intestinal lumen can be characterized as:

The sodium-potassium ATPase is one of the major energy consumers in the human body.Which other active transport process in the human body uses a mechanism similar to that of the sodium-potassium ATPase?

Introduction to Biomolecules

Introduction to Protein Structure

Oxygen Transporters: Hemoglobin and Myoglobin

Enzymatic Reactions

Coenzymes

DNA, RNA, and Protein Synthesis

The Human Genome

Protein Targeting

Introduction to Genetic Diseases

Viruses

DNA Technology

The Cytoskeleton

The Extracellular Matrix

Plasma Proteins

Extracellular Messengers

Intracellular Messengers

Cellular Growth Control and Cancer

Digestive Enzymes

Introduction to Metabolic Pathways

Glycolysis, Tricarboxylic Acid Cycle, and Oxidative Phosphorylation

Carbohydrate Metabolism

The Metabolism of Fatty Acids and Triglycerides

The Metabolism of Membrane Lipids

Lipid Transport

Amino Acid Metabolism

Heme Metabolism

The Metabolism of Purines and Pyrimidines

Vitamins and Minerals

Integration of Metabolism

Filters