How would the immediate loss of ATP likely influence the delivery of uncoated vesicles to their target membrane? Vesicles would not tether to their target membrane Vesicles would not dock with their target membrane Vesicles would not fuse with their target membrane Vesicles delivery would not be affected

How would the immediate loss of ATP likely influence the delivery of uncoated vesicles to their target membrane? Vesicles would not tether to their target membrane Vesicles would not dock with their target membrane Vesicles would not fuse with their target membrane Vesicles delivery would not be affected

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter4: Cell Structure

Section: Chapter Questions

Problem 14SA

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Secretory vesicles (destined for exocytosis) that fuse with the plasma membrane only in an intermittent manner (often requiring an environmental signal) are properly referred to as: constitutive secretory vesicles (like those that carry lipids, such as phosphatidylcholine) the v-SNARES the endosomes the t-SNARES regulated secretory vesicles (like those that carry hormones, such as insulin)
Secretory vesicles fuse with the cell membrane to release their contents to the outside of the cell. In this process, the membrane of the secretory vesicle becomes part of the cell membrane because small pieces of the membrane are continually added to the cell membrane, one would expect the cell membrane to become larger and larger as secretion continues. The cell membrane stays the same size, however. Explain how this happens.
Secretory vesicles (destined for exocytosis) that fuse with the plasma membrane continuously, with no requirement for hormones or any other environmental signal, are properly referred to as: the v-SNARES constitutive secretory vesicles (like those that carry lipids, such as phosphatidylcholine) the endosomes regulated secretory vesicles (like those that carry hormones, such as insulin) the t-SNARES
In the process of exocytosis, vesicles coming from the inside of the cell fuse with the plasma membrane which travels across the membrane to be released outside the cell. This type of transport usually applies to enzymes and hormones. Can you cite an Texample in plants where this form of transport is beneficial? How about in animals?
In nonmuscle cell locomotion, which protein is activated to nucleate a filament? Arp2/3 Vinculin Gelsolin Profilin Cofilin
Vesicles from the rough ER most likely are on their way toa. the peroxisomes.b. the lysosomes.c. the Golgi apparatus.d. the plant cell vacuole only.e. the location suitable to their size
The major function of the sodium-potassium pump is toa. pump Na+ into and K+ out of the cell.b. generate the resting membrane potential.c. maintain the concentration gradients of Na+ and K+ across theplasma membrane.d. oppose any tendency of the cell to undergo hyperpolarization.
When LDL (low density lipoprotein) is taken up by cells during pinocytosis, which of the following steps in the processing of LDL and its receptor protein does not occur? LDL attaches to LDL receptors, which form clathrin-coated vesicles the vesicles fuse with endosomes, and LDL receptors are recycled LDL is digested in lysosomes, releasing cholesterol to the cytoplasm the endosomes fuse with lysosomes for digestion of the LDL LDL receptors are digested in the lysosomes along with the LDL
What are the enzymatic activities of the sodium-potassium ATPase (pump)? binds to and hydrolyzes ATP; binds to 3 Na+ in cytoplasm and releases outside cell; binds to 2 K+ outside cell and releases into cytoplasm binds to and hydrolyzes GTP; binds to 3 Na+ in cytoplasm and releases into nucleus; binds to 2 K+ inside cell and releases into lysosome binds to and hydrolyzes 3 ATP; binds to 1 Na+ in cytoplasm and releases outside cell; binds to 1 K+ outside cell and releases into cytoplasm binds to and hydrolyzes ATP; binds to 2 Na+ in cytoplasm and releases outside cell; binds to 3 K+ outside cell and releases into cytoplasm
A. Fill in the blank: The motor protein responsible for transporting vesicles to the plasma membrane is named ____________. (spelling matters!) B. Specific inhibitors of dyneins have yet to be discovered. When they are discovered, how would they most likely affect cells? Reduce retrograde transport of endosomes Decrease pseudopod formation in amoeboid cells Increase cell size Decrease contraction of skeletal muscle
Detection of external signals by plant cells often results in a transient rise in the concentration of Ca2+ ions in the cytoplasm. What transport processes can cause such an increase in cytoplasmic Ca2+, and what transport processes can remove the excess Ca2+ and restore the level of Ca2+ to its resting state?
A plant cell placed into a hypotonic environment will: Lyse Will “puff up” and swell but not lyse Go through plasmolysis Remain at the same osmotic pressure