|When you study germs, what color are they?
|Question Date: 2013-05-08|
Germs can be many different colors actually.
It just depends on what kind of germ (or species
of bacteria you could say) it is and what sort of
media (bacteria food) they are growing on. Most
of the time, bacteria are tan or white. However
some bacteria, like Staphylococcus aureus, are
bright gold! Also, when bacteria eat certain
things in the food they grow on they can change
colors. Some things turn bacteria blue or even
here to see bacteria
Hope that helped to answer your question!
Germs (bacteria) can be all kinds of colors,
but many are typically a light green or yellow
color. However, scientists who study bacterial
cells will often stain them with a technique
called "Gram staining." Bacteria that are
gram-positive have a thick layer of
"peptidoglycans" on their cell membranes and
retain the stain, making them violet. Bacteria
that are gram-negative cannot retain the stain,
and they look pink instead.
For me, germs are so small I can't even see
them. If I try to look at them under a microscope,
I have to use a very high magnification. Even
then, they are clear and hard to see. Sometimes we
will stain them to see them better. The stain is
specific for part of the germ so that we know we
have found the right germ.
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