Which of the following lipids is primarily solid at room temperature? A) Oils B) Fats C) Phospholipids D) Glycolipids

B) Fats

Fill in the blank: Phospholipids consist of two fatty acids, a glycerol molecule, and a ______ group.

Phosphate

True or False: Lipids are considered true polymers like carbohydrates and proteins.

False. Lipids are not true polymers; they are a diverse group of substances that do not share a common structure.

What is the primary function of lipoproteins in the human body?

Transport lipids in the bloodstream.

Riddle: I can be found in cell membranes, am composed of fatty acids and a phosphate group, and help form bilayers. What am I?

Phospholipid

Which fatty acid classification is characterized by the presence of no double bonds? A) Unsaturated B) Saturated C) Polyunsaturated D) Monounsaturated

B) Saturated

Fill in the blank: The simplest type of phospholipid is ______.

Phosphatidic acid

True or False: Medium-chain fatty acids require carnitine for entry into mitochondria.

False. Medium-chain fatty acids do not require carnitine for their entry into mitochondria.

What type of fatty acid has one double bond in its hydrocarbon chain?

Monounsaturated fatty acid

Riddle: I am a fatty acid that plays a crucial role in reducing cardiovascular risk and can be found in fish oil and human milk. What am I?

Docosahexaenoic acid (DHA)

Which type of lipid is formed by the reaction of fatty acids with high molecular weight monohydric alcohols?

Waxes

Fill in the blank: The presence of the R group in fatty acids imparts a ______ characteristic.

Nonpolar

True or False: Trans fatty acids are beneficial for heart health.

False. Trans fatty acids may increase the risk of cardiovascular diseases.

What is the primary storage form of lipids in the body?

Triacylglycerol (TAG)

Riddle: I am the type of lipid that contains both carbohydrates and fatty acids, and I help with cell recognition. What am I?

Glycolipid

Which fatty acid is classified as essential due to the body's inability to synthesize it? A) Oleic Acid B) Linoleic Acid C) Palmitic Acid D) Stearic Acid

B) Linoleic Acid

Fill in the blank: The iodine number of a fat indicates its level of ______.

Unsaturation

True or False: Cholesterol is a major component of plant cell membranes.

False. Cholesterol is absent in plants.

What is the effect of unsaturated fatty acids on membrane fluidity?

They enhance fluidity.

Riddle: I am a type of lipid characterized by a ceramide backbone and involved in cell signaling. What am I?

Sphingolipid

Which condition is characterized by the accumulation of sphingolipids due to enzyme deficiency?

Sphingolipidosis

Fill in the blank: The enzyme deficiency in Gaucher disease leads to the accumulation of ______.

Glucocerebroside

True or False: Essential fatty acids can be synthesized by the human body.

False. Essential fatty acids must be obtained from the diet.

What is the primary role of eicosanoids derived from arachidonic acid?

They play important roles in various physiological processes.

Riddle: I am a lipid that can form micelles and liposomes, often used in drug delivery. What am I?

Amphipathic lipid

What classification of fatty acids includes those with two or more double bonds?

Polyunsaturated fatty acids

Fill in the blank: The L/S ratio is important for assessing the maturity of ______.

The fetal lung

True or False: Lecithin is a type of sphingophospholipid.

False. Lecithin is a type of glycerophospholipid.

What process refers to the hydrolysis of triacylglycerol by alkali to form soap?

Saponification

Riddle: I help protect nerve fibers and am a major component of the myelin sheath. What am I?

Sphingomyelin