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VashaNatasha [74]
3 years ago
8

Which best describes a difference between transcription and DNA replication??

Biology
2 answers:
pashok25 [27]3 years ago
7 0
B is the right answer
Mashcka [7]3 years ago
6 0

Answer:

<em><u>The right answer is "D".Transcription uses uracil.</u></em>

Explanation:

The genes carried by the DNA will be encoded in another form: messenger RNA, during a process called "transcription".

The DNA and RNA molecules are chemically very close, but the second has an extra oxygen (in red on the right of the letters) on the sugars (riboses) that make up its nucleotides (the DNA actually contains deoxyribose). In addition, the thymine (T) of DNA is replaced by uracil (U) in RNA.

Hope this help

Have a nice day!!

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Answer:

Low phenylalanine concentration:

  • If the enzyme is inactive, PAH will look like its inactive form, with phenylalanine located in the allosteric site / inactive site so that PAH is a different shape. This will not allow as much phenylalanine to be converted into tyrosine, as we wait for Phe levels to increase.

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Think about it like this. Ever heard of homeostasis? That's how the body likes to be the same, keep everything regulated, all the time. So if there are high levels of something, the body is going to try to keep that something down, and if there are low levels, it's going to try to increase the concentration of that thing.

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