Protein synthesis in an animal cell occurs -

On ribosomes presents 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 presents in cytoplasm as well as in mitochondria
Cells are made up of many cell organelles. One of these organelles are minute spherical structures called ribosomes. They are responsible for synthesis of proteins in the cells. So they are also called protein factories of the cells. They are present over Rough Endoplasmic Reticulum and hence they too can synthesis proteins. Apart from this, mitochondria use proteins to breakdown sugars and produce ATP in the form of energy.
So, option A 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. Proteins are synthesised by ribosomes present onand modified and packaged in.

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?

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