The outbreak of measles within the last few years was due to

TLS Online TPP Program

#Question id: 24669

#Unit 2. Cellular Organization

Match the following inhibitors (Column I) with their effect (Column II).

TLS Online TPP Program

#Question id: 24670

#Unit 2. Cellular Organization

Which of the following statement(s) is (are) true of V-class proton pumps?

a. They are ATPases.

b. They are present in membranes of plant vacuoles.

c. They serve to decrease the pH inside a lysosome.

d. They can acidify the lumen of an organelle (or the extracellular space) because these pumps are electrogenic

TLS Online TPP Program

#Question id: 24671

#Unit 2. Cellular Organization

Cholesterol and phospholipids are transported between organelles by

i. Golgi-dependent mechanisms.

ii. incompletely characterized vesicle populations.

iii. direct contact between membranes and, to some extent, small, soluble lipid-transfer proteins.

Which of the following statements are correct?

TLS Online TPP Program

#Question id: 24672

#Unit 2. Cellular Organization

Which statement describes the mode of action of the ABCB1 transporter (the first eukaryotic ABC transporter to be recognized)?

TLS Online TPP Program

#Question id: 24673

#Unit 2. Cellular Organization

Which of the following properties is (are) typical of uniport proteins?

TLS Online TPP Program

#Question id: 24674

#Unit 2. Cellular Organization

 Membrane lipids may

a. spontaneously flip-flop from one membrane leaflet to the other.

b. move laterally within one membrane leaflet.

c. aggregate with membrane proteins to form lipid rafts.

d. be unequally distributed in the two membrane leaflets.

e. be present in varying amounts in different cellular membranes