Answer:
Correct option is C.
Explanation:
Gram staining is a technique of separation of the bacteria based on the cell wall composition. Steps involved in gram staining are:
1) Primary stain application which is known as crystal voilet, it stains all cells purple/blue.
2) Mordant stain application which is known as iodine solution, is added, and form crystal iodine complex, all cells continue to stain blue/purple.
3) Decoloration step, in this step, we can differentiate gram negative or gram positive bacteria. So, decolorizing agent such as ethanol or acetone extracts blue color from thin walled peptidoglycan layer gram negative bacteria, and gram positive bacteria remain blue/purple because it contains thick walled peptidoglycan layer.
4) Counterstain application in this step safranin red dye stain the gram negative decolorized cells red/pink, and gram positive bacteria remain same blue.
So, if a student is performing a Gram stain of a mixed culture of both E. coli and S. aureus, and he forgets to decolorize with ethanol Both the bacteria should appear blue/purple color.
Answer:
Carrier protein help molecules to move through a cell membrane.
Explanation:
Carrier protein help molecules to move through a cell membrane.
Carrier proteins transport ions and molecules either through facilitated diffusion or by secondary active transport. These proteins also bind to a specific molecule that needs to be transported.
Answer:
The given blank can be filled with explicit memory.
Explanation:
The declarative memory or explicit memory refers to one of the two prime subdivisions of long-term memory. The explicit memory needs conscious thought like recalling or remembering something. It is what the majority of the individuals possess in mind when they think of memory. This form of memory is usually associative, that is, the brain associates the memory together.
