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irinina [24]
3 years ago
5

2. What do you call the shape of a DNA molecule?

Biology
1 answer:
Tju [1.3M]3 years ago
3 0

Answer:

double helix

Explanation:

looked up on google lol

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You INCORRECTLY perform an acid-fast stain on a smear from a mixed culture of Mycobacterium smegmatis (acid-fast) cells and Stap
Dahasolnce [82]

Answer:

In acid-fast staining, carbon fuchsin is used as a primary stain which dissolves the mycolic acid present in the cell wall of <em>Mycobacterium smegmatis </em>and penetrates through it which results in staining <em>Mycobacterium</em> red.

Staphylococcus aureus cell wall does not contain mycolic acid so carbon fuchsin does not penetrate its cell wall, therefore, it becomes colorless after destaining with acid alcohol.

After destaining step methylene blue is added to stain non-acid-fast bacteria blue. So if I mistakenly forgot to use methylene blue during the procedure <em>Mycobacterium smegmatis</em> will appear red due to carbon fuchsin present in their cell wall and S<em>taphylococcus aureus</em> will appear colorless because it is destained.

5 0
3 years ago
Which has a cone for its reproductive structure
Neko [114]

Answer:

conifers: Cones

Explanation:

Conifers have cones (hence their name). Cones are the reproductive structures ofthe conifers: Cones are diploid tissue produced by the dominant sporophyte stage. The haploid gametophyte stage develops and produces gametes inside the cone.

6 0
3 years ago
What fraction of species on the planet been threaten by humans?
Paul [167]
I think it is one-third. 
8 0
3 years ago
The proces that releases energy from food in the presence of oxygen is called
Ilia_Sergeevich [38]

Answer:

Cellular respiration :)

Explanation:

Your body cells use the oxygen you breathe to get energy from the food you eat.  During cellular respiration the cell uses oxygen to break down sugar. Breaking down sugar produces the energy your body needs

7 0
3 years ago
Only answer if you know!!!!!!
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The skin will get infected
5 0
2 years ago
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