Protein synthesis in animal cell occurs A: only on ribosome present in cytosol B. On ribosome present in cytoplasm as well as in mitochondria C. only on ribosome attached to nuclear envelope and endoplasmic reticulum D. On ribosome present in the nucleolus as well as in cytoplasm

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Solution

on ribosome present in cytoplasm and mitochondria(as only is not written in this option as it occur in RER and chloroplast as well)

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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.

Ribosomes are found in

Q1. Provide the correct answer:
1. Ribosomes occur freely in the cytoplasm as well as attached to:
2. The organelle meant for synthesis of ATP is:
3. A cell looses water when placed in:
4. The organelle that has its own DNA and ribosomes is:
5. The organelle present in plant cell but not in animal cell is:

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 attached to the endoplasmic reticulum through glycoproteins known as Ribophorin I and II. Which subunit of ribosome get attached to the endoplasmic reticulum?

Q. In a biology lecture, the teacher was dictating the organelles of a cell as endoplasmic reticulum, mitochondria, nucleus, ribosome, centriole and centrosome. Which of the following cell was she referring?

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