D mitochondria two membranes that form a sac within a

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responsible for the processing and packaging of protein molecules.d.Mitochondria – two membranes that form a sac-within-a-sac known as the power plant of the cell.e.Lysosomes – are bags of digestive enzymes that digest invading particles such as those from bacteria or viral infections.f.Proteasomes – hollow cylindrical drumlike organelles responsible for breaking down abnormal and misfolded proteins from the endoplasmic reticulum.g.Peroxisomes – harbor enzymes that remove toxic chemicals from the cytosol.h.Cytoskeleton – many microscopic fibers of different thicknesses that provides structural support for the cell and its components.i.Cell fibers – are chainlike molecules that actively build at one end and disintegrate at the other end.
4.The three types of intercellular junctions and their special functional advantages are:
5.The function of the nucleus is to house genetic code responsible for protein synthesis. The nucleoli is an area of the cell’s nucleus that transcribes rRNA and assembles ribosomes units.

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