Answer:
IN GRAMS stain bacteria having blue /purple colour are <u>GRAM positive</u><u> </u>bacteria.
Explanation:
GRAM staining is the technique to differentiate bacteria on the basis of stain. In this procedure bacterial cells with blue/purple colour are Gram positive and cells with pink colour are Gram negative.
PROCEDURE
- In the first step cells are stained with crystal violet dye which is blue in color.
- Then Grams iodine solution is added, it forms a complex between dye and iodine. This complex is insoluble in water.
- Next step is addition of ethyl alcohol as a decolorizing agent. It shrinks the peptidoglycan layer by dehydrating it. In gram negative bacteria on the treatment of alcohol this complex( crystal violet- iodine complex) comes out from the outer membrane because of thin peptidoglycan layer. Gram negative bacteria lost color and decolorized. While in Gram positive bacteria because of thick peptidoglycan ,crystal violet-iodine complex trapped in the membrane. And cells don't give violet color of dye.
- After this a counterstain safranine is used, which can not color the stained Gram positive bacteria. Gram negative decolorized bacteria stain pink with safranine.
They protect us from uv light
Answer:
Located in one of the major cities of South Africa, the addo elephant national park is a diversified wild- life park. This park was initially made in 1931, to protect the only remaining eleven elephants species in that area. The park has been successful in its mission and the population of elephants in the park has increased over time.
The expansion of the addo national park has included the Woody Cape Nature Reserve and a marine reserve in its territories. The addo national park has a size of 1,640 km² now and its expansion work is in progress which will increase the park size upto 3,600 km².
That is, it has one side that is positively charged and one side that is negatively charged. The molecule is made up of two hydrogen atoms and one oxygen atom.
Answer:
Lysosomes.
Explanation:
The cell constitutes of the different cell organelle that plays an important role in the living organism. The cell organelle of Eukaryotes are membrane bound organelle.
Different cell organelle are lysosomes, mitochondria, Golgi body and endoplasmic reticulum. Lysosomes is known as suicidal bag as it has the ability to digest its own protein. They plays an important role in intracellular digestion as they have the acidic environment and enzymes that can digest the content of its own cell.
Thus, the correct answer is option (2).