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essay question: 1.explain why all cells must have the four parts all cells have. 2. Be able...

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Biology

essay question: 1.explain why all cells must have the four partsall cells have.
2. Be able to compare and contrast prokaryotic and eukaryoticcellular characteristics. (including DNA location, cell wallmakeup)

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3.9 Ratings (596 Votes)
Q1 Cell is the basic structuralfunctional and biological unit of a living organism British scientist Robert Hooke first discovered it in 1665 Cells give structure to the body take nutrients from food convert the nutrients into energy and carry out specialized functions They also contain the bodys hereditary material by which they are able to make copies of themselves A cell basically consists of four parts i Plasma membrane or cell membrane ii cytoplasm iii Ribosome iv DNA These four parts of cell are important for the functionality of a cell Role of these parts are i plasma membrane or cell membrane It is the outermost layer of cell made up of lipoprotein bilayer it is the boundary or barrier between the cell and its environment it gives cell a shape regulates the entry and exit of substances into and out of the cell It acts like a guard of cell giving permission what to enter and what not Plasma membrane is made up of a phospholipid bilayer having two layers of phospholipids backtoback Phospholipids are the lipids with a phosphate group attached to them They have one head and two tails The head is polar and hydrophilic or waterloving The tails are nonpolar    See Answer
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