The endomembrane system (endo = within) is a group of membranes and organelles in eukaryotic cells that…

Flagella (singular = flagellum) are long, hair-like structures that extend from the plasma membrane and…

The cytoplasm comprises the contents of a cell between the plasma membrane and the nuclear…

Like prokaryotes, eukaryotic cells have a plasma membrane (Figure 3.9) made up of a phospholipid bilayer…

At this point, it should be clear that eukaryotic cells have a more complex structure…

Cells fall into one of two broad categories: prokaryotic and eukaryotic. The predominantly single-celled organisms…

Cells vary in size. With few exceptions, individual cells are too small to be seen…

Figure 3.1 (a) Nasal sinus cells (viewed with a light microscope), (b) onion cells (viewed…

DNA has a double-helical structure. It is composed of two strands, or polymers, of nucleotides.…

Nucleic acids are key macromolecules in the continuity of life. They carry the genetic blueprint of…