Answer
primary function of cell membrane is protecting organelles because cell membrane acts as a physical barrier allowing a very few molecules across it while fencing the majority of chemicals inside cell in this way it maintains the internal composition of cell and protect the organelles from the attack of bacteria and viruses
Explanation:
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<span> Descriptive theories help direct specific nursing activities</span>
Answer: C. A substrate
Explanation:
A substrate is a substance on which an enzyme act. The enzyme acts on substrate X and converts it to Y.