Question

B. The plasma memibrane buds off exosomes from the surface C. They come from the nucleus theough the D. Specialized vesicles from E. Late endosomes fuse from the surface mitochondria bud off and are secreted with the plasma membrane and release their content is a minus end directed motor on microtubules A. Dynein B. Myosin C. Kinesin D. Motorin .E. All of the above 19. M ovement of molecules from one side of an epithelial Iayer so the oher is prevented from going in berwern cells by A. Adherens junctions B. Tight yunctions C. Gap junctions D. Desmosomes E. Hemidesmosomes 20. How are olfactory receptor cells depolarized upon binding to odorants? A. The odorant binds to a ligand gated ion channel B. The odorant binds to a receptor tyrosine kinase C. The odorant binds to a G protein coupled receptcr D. The odorant binds to a cAMP gated ion chasnel 21. Autophagy is A. A trafficking pathway to the lysosome B. The engulfment of defective organelles or protein aggregates by a double membeane vesicle C. Activated by starving the cells D. Was discovered in yeast E. All of the above 22. You have discovered a mutant cell line that has defective end s res that you suspect are 10% Irger in sure. The best way to determine if this is true would be to perform A. Scanning electron microscopy B. Transmission electron microscopy C. Laser scanning confocal microscopy D. X-ray crystallography E. NMR spectroscopy domains 23. A scaffold protein would mostly contain A. Kinase D. Prosein-protein binding domains E. All of the above The diagram above is a tRNA/mR.NA pairing Choose a letter (A-D) for each of th Auti

Answer 1

18) Option- A

Kinesin and dynein move in opposite directions along microtubules, toward the plus and minus ends, respectively. The former consists of 2 heavy chains, wound around each other in a coiled-coil structure, and two light chains and the later consists of two or three heavy chains in association with multiple light and intermediate chains.

19) Option- B

Tight junctions are  involved in preventing molecules from leaking across a tissue.It plays an important role in blood-brain barrier.

21) Option- D

Autophagy (self-eating) is an intracellular degradation system which leads to the formation of autophagosomes and their subsequent delivery to the lysosomes for degradation by the lysosomal hydrolases. Autophagy was first discovered in Yeast.