35) What organelle is in charge of packaging vesicles that renew the plasma memb

Question

35) What organelle is in charge of packaging vesicles that renew the plasma membrane? 1. the nucleus 2 the endoplasmic reticulum the Golgi apparatus the lysosome 36) Which of the following organelles is surrounded by a double lipid bilayer? 1. The endoplasmic reticulum 2. the Golgi apparatus 3. The mitochondria 4. The lysosome 37) Keratin is an example of 1. microtubule 2. intermediate filament 3. microfilament 4. smooth filament 8) The organelle responsible for a variety of functions centering on the synthesis of lipids and carbohydrates is 1. The Golgi apparatus. 2 The rough endoplasmic reticulum, a membranous organelle 3. The smooth endoplasmic reticulum, a membranous organelle 4. The nucleus, which is at the center of a cell. 39) What is the role of the proteasome? L.. To degrade membrane proteins after they are no longer functional 2. To make proteins 3. To modify proteins 4. To degrade misfolded proteins 40) The process of protein formation is called 1. translation. 2. mitosis. 3. replication. 4 transcription. 41) Which one of the following pathways better reflects the synthesis of a prototypical cytosolic protein? 1. Ribosome> Cytosol 2. Nucleus > Endoplasmic reticulum> Cytosol 3. Smooth endoplasmic reticulum > Golgi apparatus Secretory vesicle > plasma membrane> endocytic vesicle > Cytosol 4. Ribosome > Endoplasmic reticulum> Golgi apparatus Cytosol 42) Cells lining the vas deferens (tubules transporting sperm) have a structure that helps propel sperm. This structure has a microtubule cytoskeleton. What is it and what does it do? L Microvilli; increase cell's surface area and absorptive ability 2. Cilia; move substances across cell surface 3. Microvilli; move substances across cell surface 4. Cilia; increase cell's surface area and absorptive ability

Explanation / Answer

35. The proteins are forms by ribosomes, they enter the rough endoplasmic reticulum. Here they are converted into secondary or tertiary structure. These proteins are then transfered to golgi apparatus where their packaging into vesicles take place to be secreted out.

Ans. Golgi apparatus.

36. The mitochondria and nucleus are the only organelles with double lipid bilayer.

Ans. Mitochondria

37. Intermediate filament have 5 types.

Ans. Intermediate filament.

39. Proteasome degrades any protein which is not needed or misfolded in the cell. It does not destroy the normal membrane protein.

And. To degrade misfolded proteins.

40. The formation of RNA from DNA is known as transcription whereas the process of formation of proteins from RNA is known as translation.

Ans. Translation.

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