Lecture 10 recap

What is the primary function of the rough endoplasmic reticulum (RER)?

• Storage of lipids

• Synthesis of phospholipids

• Modification of proteins

• Synthesis of carbohydrates

What characterizes the smooth endoplasmic reticulum (ER)?

• Presence of ribosomes

• Absence of ribosomes

• Presence of enzymes

• Absence of membranes

What type of enzymes do lysosomes contain?

• Hydrolytic enzymes

• Phosphorylating enzymes

• Oxidative enzymes

• Dehydrogenases

What is the function of the Golgi body?

• Production of ATP

• Storage of RNA

• Modification and shipping of proteins

• Synthesis of DNA

What is the cis face of the Golgi body?

• Faces the plasma membrane

• Faces the nucleus and RER

• Faces the cytoplasm

• Faces the lysosomes

What is the role of the signal recognition particle (SRP)?

• To synthesize proteins

• To transport proteins to the Golgi

• To bind to the signal and halt protein synthesis

• To modify proteins in the Golgi

How do proteins move from the RER to the Golgi?

• By diffusion

• Through vesicles

• Via microtubules

• By direct contact

What is the pH range maintained by lysosomes?

• Neutral (7-8)

• Alkaline (11-12)

• Acidic (4-5)

• Basic (9-10)

What is the primary structure of the Golgi body?

• Cylindrical structures

• Single membrane

• Solid organelles

• Flattened membranous sacs

What happens to the cisternae in the cisternal maturation model?

• They dissolve in the cytoplasm

• They mature as they move from cis to trans

• They break apart immediately

• They remain stationary