Ribosomes are present on the surface of which cell organelle?

Chloroplast

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Mitochondria

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Golgi complex

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Endoplasmic reticulum

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Solution

The correct option is D
Endoplasmic reticulum

The rough endoplasmic reticulum (RER) has ribosomes on its surface. Ribosomes help in the synthesis of proteins. The smooth endoplasmic reticulum (SER) does not have ribosomes on its surface. The SER helps in the synthesis of lipids.

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Q. Assertion :Ribosomes are non-membrane bound organelles found in the prokaryotic cells only. Reason: Ribosomes are present only in the cytoplasm.

Q. Ribosomes are essential for protein synthesis, but they are present in mitochondria and plastids, the sites of respiration and photosynthesis. What is the role of ribosomes in these cell organelles?

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.

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Q. Cyanobacteria are photosynthetic prokaryotes. Which of the following cell structures are absent in cyanobacteria?

I. Cell membrane
II. Nucleus
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Question 14
The cell organelle involved in forming complex sugars from simple sugars are

(a) Endoplasmic reticulum
(b) Ribosomes
(c) Plastids
(d) Golgi apparatus

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Ribosomes are present on the surface of which cell organelle?

The correct option is D Endoplasmic reticulumThe rough endoplasmic reticulum (RER) has ribosomes on its surface. Ribosomes help in the synthesis of proteins. The smooth endoplasmic reticulum (SER) does not have ribosomes on its surface. The SER helps in the synthesis of lipids.

The correct option is D
Endoplasmic reticulum

The rough endoplasmic reticulum (RER) has ribosomes on its surface. Ribosomes help in the synthesis of proteins. The smooth endoplasmic reticulum (SER) does not have ribosomes on its surface. The SER helps in the synthesis of lipids.