12 Questions
What is the primary functional property of the covalent bond between oxygen and hydrogen in acetic acid?
The bond is so polar that hydrogen ions (H+) tend to dissociate reversibly.
In cells, where is acetic acid found in its ionic form?
In the carboxylate group.
What is the name of the class of compounds that acetic acid belongs to?
Carboxylic acids.
What property of acetic acid is responsible for the sour taste of vinegar?
Its high concentration of hydrogen ions.
What type of reaction is involved in the synthesis of a fat molecule (triacylglycerol) from glycerol and fatty acids?
Dehydration.
How can triglycerides be formed from a mix of different fatty acids?
By adding different fatty acids to the glycerol backbone.
What is the unifying feature of lipids?
Having little or no affinity for water
Which of the following is NOT one of the most biologically important lipids?
Carbohydrates
What are the components of a triacylglyceride molecule?
One molecule of glycerol and three molecules of fatty acids
What is the functional property of alcohol groups (-OH) in biological molecules?
They are polar and attract water molecules, helping dissolve organic compounds
Which of the following molecules contains a carboxylic acid group?
Serine
Which of the following statements about the solubility of n-alkanes in water is true?
The solubility of n-alkanes in water decreases with increasing chain length
This quiz covers the basics of lipids, a diverse group of hydrophobic molecules with little or no affinity for water. Learn about neutral lipids like fats, phospholipids, and steroids, which are important in biological functions.
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