BMS I Exam I Review I

Which lipid type contains a sphingosine backbone and determines human blood group antigens?

• Glycerophospholipids

• Sterols

• Triacylglycerols

• Sphingolipids

Which protein modification is key to activating RNA polymerase II during transcription initiation?

• Ubiquitination

• Glycosylation

• Phosphorylation

• Acetylation

Eicosanoids such as prostaglandins, thromboxanes, and leukotrienes are derived from which fatty acid precursor?

• Stearic acid (18:0)

• Arachidonic acid (20:4, ω6)

• Palmitic acid (16:0)

• Oleic acid (18:1, ω9)

What is the primary function of triacylglycerols in the body?

• To act as surfactants in lung tissue

• To form structural components of cell membranes

• To serve as the main storage form of fatty acids

• To act as carriers for second messengers

Which statement best describes phospholipids?

• They consist of fatty acids esterified only to sphingosine

• They are the main lipid constituents of membranes

• They serve exclusively as energy storage molecules

• They lack any polar head groups

Which of the following is a major function of cholesterol?

• Energy storage in adipose tissue

• Precursor for bile acids, steroid hormones, and vitamin D

• Direct electron carrier in oxidative phosphorylation

• Enzyme regulator in fatty acid synthesis

What is this molecule?

• Cholesterol

• Cardiolipin

• Lysophosphatidylcholine

• Dipalmitoyl Lecithin

Where is the polar group of the phospholipid?

• Head

• Tail

• Midline

Which fatty acid is represented in the photo?

• Arachidonic acid

• Linoleic acid

• Palmitoleic acid

• Oleic acid

Which of the following is involved in inflammation and pain?

• Prostaglandins

• Thromboxanes

• Cholesterol

• Leukotrienes