GENERAL HISTOLOGY

EPITHELIUM

CILIA

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which type of ribosome creates the most proteins that are used by the cell?
A
bound
B
free-floating
C
Either A or B
D
None of the above
Explanation: 

Detailed explanation-1: -Membrane-bound ribosomes, attached to the cytosolic side of the ER membrane, are engaged in the synthesis of proteins that are being concurrently translocated into the ER. Free ribosomes, unattached to any membrane, synthesize all other proteins encoded by the nuclear genome.

Detailed explanation-2: -They are known as free ribosomes. These ribosomes group together and form structures called polysomes. They are freely floating in the cytoplasm and move all around the cell.

Detailed explanation-3: -Ribosomes. Ribosomes are the protein factories of the cell. Composed of two subunits, they can be found floating freely in the cell’s cytoplasm or embedded within the endoplasmic reticulum.

Detailed explanation-4: -There are free ribosomes that are suspended in the cytoplasm of the cell, but many of them are attached to the rough endoplasmic reticulum associated with the nuclear envelope of the cell. The ribosomes in prokaryotic cells are free floating structures, there being no nuclei in such cells.

Detailed explanation-5: -The free-ribosomes synthesize soluble cytoplasmic proteins, peripheral membrane proteins, mitochondrial proteins, chloroplast proteins, peroxisomal and nuclear proteins, etc. In short, free-ribosomes are responsible for the production of all the proteins that are found within the cell and are present in the cytosol.

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