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Endoplasmic Reticulum and Golgi Bodies

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Question

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RER has ribosomes atached to it, which produce proteins. the manufactured proteins are sent to various places (depending on their need) through the ER.RER is called so because of the ribosomes attached to it.
Q-1. Does it mean that the proteins manufactured in the Ribosomes (in he RER) are transpotted through the RER ?? If no, then how ??

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Solution

Ribosomes present in RER produce proteins and it is sent to various places through the Endoplasmic reticulum.

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Read the passage and answer the following question.

Ribosomes are the smallest cell organelles which can be seen only through an electron microscope. They are found in both prokaryotic as well as eukaryotic cells. Ribosomes are dense, round bodies which occur freely in the cytoplasm and may remain attached to the surface of the endoplasmic reticulum. Chemically, ribosomes are made up of ribonucleoprotein (in eukaryotic cells, the constituent of the ribosome is 40% protein and 60% ribosomal RNA). Ribosomes help in the process of protein synthesis. They are, therefore, called as the protein factories of the cell.

Which of the following is called as "protein factories of the cell"?

Q. Which of the following options are not a function of ribosomes?
(i) It helps in manufacture of protein molecules.
(ii) It helps in manufacture of enzymes.
(iii) It helps in manufacture of hormones.
(iv) It helps in manufacture of starch molecules.

Q. The RER looks because it has attached to its surface.

Q. By loss of ribosomes, RER converts into

Q. Which of the following statement(s) is/are correct?.
i) Ribosomes are called ‘protein factories’ of the cell.
ii) Ribosomes consist of three different proteins.
iii) During translation, the ribosome contains only one of the two subunits.

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