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. T-SNARE protein on the vesicle binds V-SNARE protein on the target membrane 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 decreases Integrin adhesion proteins are found in focal adhesions Bending of the cilium is dependent on the dynein motor protein Cadherin proteins are found in tight junctions

Explanation / Answer

15) The correct answer is option (D).

Dynein and kinesin are the motor proteins involved in the vesicular transport along the microtubules. Kinesin is (+) end-directed microtubular motor protein and dynein is (-) end-directed microtubular motor protein. The binding of motor proteins. The synaptic vesicles are added with ATP to the microtubules, these vesicles do not bound to the microtubules or move along them. The hydrolysis of ATP facilitates the movement along the microtubules.

16) The correct answer is option (B).

The connective tissue is made up of osteoblasts (found in bone), fibroblasts ( found in dense connective tissue), chondroblasts (fond in cartilage), hemocytoblasts (found in bone marrow), erythroblasts (found in red blood cells), etc. Cartilage, bones, adipose tissue, blood, tendons and ligaments are the type of connective tissue.

The extracellular matrix is made up of collagen and polysaccharides. The fibroblast cells are involved in the formation of collagen.

17) The correct answer is option (A).

Procollagen carboxyl-terminal proteinase enzyme cleaves the termini of procollagen. All the other three statements are true.

18) The correct answer is option (B).

The function of adherens junctions is to adhere cells to one another through cadherin proteins.
Tight junctions prevent the lateral diffusion of proteins and lipids.
The function of desmosomes and hemidesmosomes is to adhere epithelial cells to the basal lamina.

19) The correct answer is option (C).

Adherens junctions and desmosomes are formed by transmembrane adhesion proteins of the cadherin family. Hemidesmosomes are formed by transmembrane adhesion proteins of the integrin family.

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