OBJECTIVE LIFE SCIENCE
CELL BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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producing primarily proteins for secretion
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producing primarily cytoplasmic proteins
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constructing an extensive cell wall or extracellular matrix
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digesting large food particles
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Detailed explanation-1: -If there are a high number of ribosomes present within the cell, then we can deduce that the main function of the cell is to produce primarily proteins for secretion. Therefore, the answer is B) producing primarily cytoplasmic proteins.
Detailed explanation-2: -A cell with a predominance of free ribosomes is most likely: producing primarily cytoplasmic proteins.
Detailed explanation-3: -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.
Detailed explanation-4: -These proteins are synthesized on free cytosolic ribosomes, and their posttranslational incorporation into the ER does not require SRP.
Detailed explanation-5: -Polyribosomes attached to the endoplasmic reticulum synthesize proteins for export from the cell (e.g., digestive enzymes) and for placement within the plasma membrane (e.g., ion channel proteins).