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antiseptic1488 [7]
3 years ago
8

Which of the following allows a cell to become specialized?

Biology
1 answer:
PSYCHO15rus [73]3 years ago
5 0
The answer your looking for is B different patterns of gene expression
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Which types of mutations in the lac operon stop Escherichia coli from utilizing lactose as a carbon source? a) promoter deletion
Sladkaya [172]

Answer:

D.) repressor DNA-binding site mutation

Explanation:

lacl prevents the repressor polypeptide is a mutant that prevent operon from binding lactose, and thus will bind to the operator and be non-inducible.. This mutant will represses the lac operon whether lactose is present or not and the lac operon will not be expressed. It is also called“super-supperesor".

The lacI locus – One type of mutant allele of lacI (callled I-) prevents the production of a repressor polypeptide or produces a polypeptide that will not allow to bind to the operator sequence.

This is also a constitutive expresser of the lac operon because absence of repressor binding permits transcription.

7 0
3 years ago
Which statement describes how enzymes and substrates are related? The enzyme influences the speed of change from substrate to pr
azamat

Correct answer: A). The enzyme influences the speed of change from substrate to product

The enzymes are the biological catalyst that speed up the rate of chemical reactions by decreasing the activation energy of the reaction pathway.

They increase the speed of change of substrate to the product and it remains unchanged in the reaction. Hence, it can be used again and again.

Enzymes are highly specific in nature, only a specific substrate binds to the enzyme's active site. Hence, a particular enzyme is required to catalyze a reaction.






3 0
3 years ago
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How does carbon moves through the system in the dark?
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Answer:

Generally, about half of the caught carbon is released in respiration. ... When it is dark, the only flow of CO2 comes from respiration.

Explanation:

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2 years ago
The subgroup that comes after genus is __________
BaLLatris [955]
Hello there!

The answer is D. Species

Hope this helps!
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Which two processes reduce the amount of carbon dioxide in the atmosphere?
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photosynthesis and respiration

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