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Anton [14]
3 years ago
13

Two students are working together to Gram stain a mix of Gram positive and Gram negative cells. One of the students accidentally

uses a bottle of water instead of ethanol during the decolorization step. How would this mistake alter their results?
A. Gram positive cells would appear pink and Gram negative cells would appear purple.
B. Gram positive cells would appear purple and Gram negative cells would appear pink.
C. Both Gram positive and Gram negative cells would appear purple.
D. Both Gram positive and Gram negative cells would appear pink.
Biology
1 answer:
Rasek [7]3 years ago
6 0

Answer:

C.Both Gram positive and Gram negative cells would appear purple.

Explanation:

Gram staining is a technique used to differentiate bacteria to two main groups based on their difference in cell wall components.

Crystal violet, decolorizer(ethanol) and a counter stain are used.

Gram positive bacteria have a thicker peptidoglycan layer hence they will retain the crystal Violet stain even after decolorization. They will stain purple

Gram negative will stain pink due to losing the initial stain and taking up the counter stain after decolorization.

Therefore, if water is used instead of ethanol. Both bacteria will retain crystal violet stain in their cell wall.

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Distinguish between voluntary and involuntary actions.
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<h2>GREETINGS!</h2><h2>_____________________________________</h2>

<u>ANSWER</u><u>:</u>

<h2><u>DEFINITIONS</u></h2><h2>_____________________________________</h2><h3><u>VOLUNTARY MUSCLES:</u></h3>

Voluntary muscles are those muscles which work under our conscious control and can be controlled at will also we can choose choose them when to use and when not to use. These are simply SKELETAL MUSCLES attached to the bone, so all the movements of hand and legs and whatever u do are because of voluntary muscles.

<h3><u>__________________________________________________</u></h3><h3><u>INVOLUNTARY MUSCLES:</u></h3>

the muscles in the human body that do not work under our will and we cant control them. They are mainly controlled by the autonomic nervous system in the body. So, involuntary muscles include all the muscles whose activity which is not controlled by our NERVES. They are also called SMOOTH MUSCLES since they are present as the visceral layer over the organs.

<h2>_____________________________________</h2><h2>DIFFERENCES</h2>

1)      VOLUNTARY MUSCLES are under our control but INVOLUNTARY                 MUSCLES are not under our control

2)      VOLUNTARY MUSCLES are also known as skeletal muscles but INVOLUNTARY MUSCLES are also known as smooth muscles

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4)      VOLUNTARY MUSCLES are controlled by the somatic nervous system. INVOLUNTARY MUSCLES are controlled by the autonomic nervous system.

5)      VOLUNTARY MSUCLES  require more energy. INVOLUNTARY MUSCLES require less energy.

<h2>_____________________________________</h2><h2>HOPE THIS HELPS!</h2><h2 />

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