C. When there is an equal number of molecules on each side
The EMB (Eosin Methylene Blue) agar is a selective and differential agar medium. It contains sucrose and lactose as fermentable substrates together with Eosin Y and methylene blue dyes which in combination gives the agar its characteristic color when prepared and serves as a pH indicator as well as an inhibitor of growth of Gram-positive bacteria. Hence, it is primarily used to isolate Gram-negative fecal coliforms while some positive fecal coliforms such as Staphylococci are also able to grow.
These coliforms are of two types:
- Lactose or sucrose fermenting coliforms form metallic sheens on the agar as a result of acid production and the response of the indicator to the increased acidity.
- Non-lactose/sucrose fermenters are only able to produce acid by protein deamination. Hence they either form colorless or pinkish colonies on the agar
On the other hand, Mannitol salt agar is a selective and differential agar medium that is primarily used to isolate Staphylococcal bacteria. The presence of sodium chloride in the medium makes it a partial or complete inhibitor of other bacteria.
Hence, an unknown bacterium that forms colorless colonies on EMB will either be a non-lactose fermenting, Gram-negative coliform that will hardly grow on Mannitol salt agar, or a Gram-positive fecal Staphylococcus.
Staphylococci bacteria are of two types:
- Coagulase-positive will form yellow colonies on the Mannitol salt agar.
- Coagulase-negative will form red colonies on the Mannitol salt agar.
More about isolating media can be found here: https://brainly.in/question/7238948
Answer:
cell wall and chloroplasts
Explanation:
its B!! :) cell wall in plant cells, cell membrane in animal cells.
Answer:
1) A nucleotide consists of a single sugar, a phosphate, and a nitrogen-containing base.
2) The monomer units of DNA are nucleotides, and the polymer is known as a "polynucleotide. Nucleotides don't have polymers because they are monomers.
3) They carry the genetic blueprint of a cell and carry instructions for the functioning of the cell. The two main types of nucleic acids are DNA and RNA.
Explanation:
hope this helps!
Answer:
Prokaryote.
Explanation:
Prokaryotes lack a nucleus and mitochondria. They do, however, have a cell membrane.
<em>Hope this is correct. Good luck on your studies!</em>
