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marissa [1.9K]
2 years ago
12

Please help!! This is a P.e question

Biology
1 answer:
zhuklara [117]2 years ago
5 0

Answer:

nose xd

Explanation:

no se ando ganando puntos

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P = 1 atm<br> Vi = 0.5L<br> Pp= 3 atm<br> What is Vr?
gavmur [86]

Answer:

1.5

Explanation:

1/0.5=3/x

1.5=1x

x=1.5

6 0
3 years ago
A student completed a lab report. Which correctly describes the difference between the "Question" and "Hypothesis" sections of
babymother [125]

Answer:

you make a hypothesis from the question by predicting what you think the outcome will be.

6 0
3 years ago
True or false? One possible way to alter chromatin structure such that genes could be transcribed would be to make histone prote
Dmitrij [34]

Answer:

False

Explanation:

The histones that are more positively charged, tight hardly to negatively charged DNA. So, enzymes, such as acetyltransferases, that reduce the positive charge of histones promote transcription.

Chromatin structure and its modifications can change the package of the DNA and consequently, alter the gene expression. The most common modifications of the chromatin are covalent modifications such as acetylation/deacetylation (by acetyltransferases and eacetylases), methylation (by methyltransferases), and phosphorylation (by kinases).  This is the way of gene expression regulation.

The effects of modifications are different, for example methylation promotes  condensation of the chromatin and as a consequence, prevents binding of transcription factors to the DNA (transcription is repressed).

Acetylation loosens the association between nucleosomes and DNA (because it neutralizes the positive charge of histones) and consequently promotes transcription. Deacetylation is a process opposite to acetylation.

5 0
3 years ago
Both animals and plants depend upon a genetic code for reproduction.<br> True<br> False
shepuryov [24]
Yes, this is True, if you didn't you or anything wouldn't be living, the genetic code is basically what makes you, from the physical features to anything else basically.
7 0
3 years ago
Read 2 more answers
Why can many ecosystems exist in one biome
ryzh [129]
The definition of a biome is the community of many ecosystems in one general area. Many ecosystems can exist in a biome because a biome could have a water ecosystem and a dirt ecosystem.
6 0
3 years ago
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