Protein synthesis in an animal cell occurs:

On ribosomes present in cytoplasm as well as in mitochondria

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On ribosomes present in the nucleolus as well as in cytoplasm

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Only on ribosomes attached to the nuclear envelope and endoplasmic reticulum

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Only on the ribosomes present in cytosol

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Solution

The correct option is A On ribosomes present in cytoplasm as well as in mitochondria
The ribosomes are produced in the nucleolus inside the nucleus. They then go out of the nucleus and they may either get embedded in the endoplasmic reticulum or may be present freely in the cytoplasm. The ribosomes are also present in the mitochondria. The ribosomes only synthesize proteins outside the nucleus. Thus, this is the correct answer.

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Similar questions

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:

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

Q. Fill in the blanks in the table given below.

\begin{matrix} Cell organelle & Function Nucleolus & (i)____(ii)____ & Synthesis and transport of proteins and fat (iii)____ & Synthesis and secretion of enzymes and hormones Ribosomes & (iv)____(v)____ & Intracellular digestion \end{matrix}

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

Q. Assertion :The endoplasmic reticulum which lacks ribosomes is called smooth endoplasmic reticulum (SER). Reason: SER is mainly involved in protein synthesis.

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