Cell Membranes and Transport

A protein is made and needs to go to a specific organelle in the cell, what is its path of transport?

• Nucleus, Cytosol, organelle

• Nucleus, SER, Cytosol, Organelle

• Nucleus, RER, Golgi, Organelle

• Nucleus, RER, Golgi, cytosol, Organelle

What is the purpose of the unsaturated tail in phospholipids?

• Fluidity

• Space-saving

• Heat Tolerence

• Protein Binding

Which of the following would you do to your own cell membranes if you had a fever?

• Decrease phospholipid tail lengths

• Increase phospholipid tail lengths

• Increase amount of Cholesterol

• Increase number of lipids in the membrane

What is the difference between flippase and scramblease

• Flippase is done in the ER and Scramblase is done in the Golgi, both are undifferentiated

• Scramblase is done in the ER and flippase is done in the Golgi, both are undifferentiated

• Scramblase is done in the ER and is differentiated and flippase is done in the Golgi and is undifferentiated

• Scramblase is done in the ER and is undifferentiated and flippase is done in the Golgi and is differentiated

What is a possible purpose of having multiple types of preteoglycans in the glycocalyx? (Best answer)

• Cell identification and Respiration

• Cell Signaling and binding

• Autophagy

• Fluorescent communication

Integral and peripheral proteins are found in the

• cytosol

• embedded within membranes

• in the extracellular matrix

• components of ATP-Dependent Chromatin Remodeling Complex

Which of the following will likely have an easy time diffusing across the cell membrane

• Acetaminophin

• Na+

• Water

• A steroid hormone

Why does the Na+/K+ antiporter require energy?

• It pumps K+ into the cell, against the electrochemical gradient

• It pumps Na+ into the cell, against the electrochemical gradient

• It pumps K+ out of the cell, with the electrochemical gradient

• It pumps Na+ out of the cell, against the electrochemcial gradient

If there was no Na+/K+ antiporter, what would be one of the effects on the cell (given what you have learned in class)?

• The Proteosome would degrade due to incorrect ubiquitin binding

• Translation would be halted due to incorrect folding of tRNA

• Cellular respiration would be stopped because pyruvate is now unavailable

• The glycocalyx would be unregulated and continue to enlarge, damaging the cell's skeletal structure

ATP is required for what type of transportation?

• Passive

• Active

• Conformational

• Simultaneous