Biochemistry of Endocytosis and Exocytosis — Flashcards

Flashcard 1: _____ is a phospholipid which is a component of the cell membrane and plays a key role in relationship to apoptosis.

Answer: Phosphatidylserine

Flashcard 2: With respect to the mass ratio, the cell membrane predominantly consists of?_____

Answer: Proteins (Proteins/Lipids)

Flashcard 3: Blood group antigens and cell surface receptors for cholera & tetanus toxins are made of what type of lipids?

Answer: Glycosphingolipids

Flashcard 4: The **β (beta) subunit** of the Na+-K+ ATPase pump is a glycoprotein with one membrane-spanning domain and _____ glycosylation sites.

Answer: Three

Extra: The beta (β) subunit is essential for the proper assembly and membrane targeting of the catalytic alpha (α) subunit. It contains three N-glycosylation sites.

Flashcard 5: A _____ binding protein dynamin is involved in pinching off the vesicle formed in clathrin-mediated endocytosis

Answer: GTP

Flashcard 6: Is exocytosis an energy dependent process?_____

Answer: Yes

Flashcard 7: The major GAG synthesized by arterial smooth muscle cells is _____, which binds LDL

Answer: dermatan sulfate

Flashcard 8: GLUT _____, found on Liver and Kidney is a urate transporter

Answer: 9