AP BIOLOGY

Detailed explanation-1: -The largest virus is smaller compared to the smallest bacteria. The size of a cell ranges from 1 to 10 millimeters. Viruses are much smaller than the cells.

Detailed explanation-2: -Viruses are much smaller. The largest of them are smaller than the smallest bacteria. Unlike bacteria, viruses can’t survive without a host. They can only reproduce by attaching themselves to cells.

Detailed explanation-3: -There are things out there even smaller than viruses. The two that scientists have discovered are called prions and viroids. A prion is (as far as we know) just a protein. Prions are proteins that can invade cells and somehow direct their own duplication, making more of the isolated proteins.

Detailed explanation-4: -The smallest of viruses are about 20 nm in diameter, although influenza and the human immunodeficiency virus have a more typical size, about 100 nm in diameter. Average human cells are 10–30 m (microns) in diameter, which means that they are generally 100 to 1000 times larger than the viruses that are infecting them.

Detailed explanation-5: -At 100 nm, Chromosomes are about the size of small viruses, which makes sense considering that viruses are basically just DNA in a protective coat. Smaller than that are the enzymes, membranes, DNA strand, and at the very bottom, a glucose molecule, coming in very close to 1 nanometer.