Clathrin coat proteins remain around the vesicle after it has budded off from th

Question

Clathrin coat proteins remain around the vesicle after it has budded off from the membrane. Proteins have to be unfolded in order to be transported into the nucleus through the nuclear pore complex. Phagocytosis is the ingestion of large particles, such as bacteria, into vesicles: True T-SNARE protein on the vesicle bind V-SNARE protein on the target membrane: True Misfolded proteins are degraded in the lumen of the endoplasmic reticulum Pseudopodia are stubby, three dimensional membrane protrusions During muscle contraction the length of the actin filaments in the sarcomere decrease Integrin adhesion proteins found in focal adhesion Bending of the cilium is dependent on the kinesis motor protein Cadherin proteins are found-in tight junctions The intestine is lined by simple cuboidal epithelia Integrin proteins on the cell surface bind directly to collagen. Heparan sulfate is an example of a glycosaminoglycan. Collagen is assembled into a triple stranded structure inside the Golgi Glycosaminoglycans consist of repeating disaccharide units

Explanation / Answer

Answers :-

1.False.(clathrin represents a perfect case of form following function; it performs critical roles in shaping rounded vesicles in the cytoplasm for intracellular trafficking. Clathrin-coated vesicles (CCV) selectively sort cargo at the cell membrane, trans-Golgi network, and endosomal compartments for multiple membrane traffic pathways. After a vesicle buds into the cytoplasm, the coat rapidly disassembles, allowing the clathrin to recycle while the vesicle gets transported to a variety of locations.)

2.False.(proteins going into the nucleus are transported through pores in the nuclear membranes with the help of nuclear transporter proteins. Nuclear proteins are transported in their folded state.)

3.True.

4.True.

5.True.

6.True.(Pseudopodia, formed by amoebae and neutrophils, are stubby three-dimensional projections filled with an actin-filament gel.)

7.False.(Focal adhesions are integrin-containing, multi-protein structures that form mechanical links between intracellular actin bundles and the extracellular substrate in many cell types.)

8.True.(Focal adhesions are integrin-containing, multi-protein structures that form mechanical links between intracellular actin bundles and the extracellular substrate in many cell types.)

9.True.

10.False.(cadherins play important roles in cell adhesion, forming adherens junctions to bind cells within tissues together. They are dependent on calcium (Ca2+) ions to function, hence their name.)

11.False.(lined by simple columnar epithelial tissue.)

12.True(Among the ligands of integrins are fibronectin, vitronectin, collagen, and laminin. The connection between the cell and the ECM may help the cell to endure pulling forces without being ripped out of the ECM.)

13.True.

14.True.

15.True(except keratin).

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