Answer:
A) A corepressor must be present
Explanation:
The key to operon expression lies in the sequence of the operator and the presence or absence of a repressor. When the repressor binds the operator, it prevents RNA polymerase from initiating transcription. The capability of the repressor to bind the operator and inhibit transcription depends on the conformation of the repressor, which is regulated allosterically by a key compound in the metabolic pathway, such as lactose or tryptophan. In a repressible operon, such as the tryptophan (or trp) operon, the repressor is unable to bind to the operator DNA by itself. Instead, the repressor is active as a DNA-binding protein only when complexed with a specific factor, such as tryptophan , which functions as a corepressor.
When tryptophan is plentiful, tryptophan molecules act as corepressors by binding to the (1) inactive repressor and (2) change its shape, allowing it to bind to the operator, (3) preventing transcription of the structural genes
Answer:
The fertilized ovule becomes the seed and the ovary becomes the fruit
Answer:
B
Explanation:
the spotted strawberries mutated so he wiped out the non mutated to encourage new growth of the mutation.
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Answer:</u></h2><h2><u>
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<em>You will not digest the best amount of nutrients if food moves more quickly; if it passes much slower, there is far too much water taken from the stool which makes it more difficult to pass, creating issues such as constipation and other problems, such as hemorrhoids.</em>
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<u>Digestion be slower and over distance</u>
- <u><em>Pros</em></u>: Absorb more nutrients and less likely to get hungry.
- <u><em>Cons</em></u>: Constipation because the longer the absorption takes, the more water is leeched into bloodstream.
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<u>Quicker and over shorter distance with slightly less absorption</u>
- <u><em>Pros</em></u>: Can eat a lot without feeling full/ gaining weight.
- <em><u>Cons: </u></em> If food travels to your duodenum so fast, your digestive tract produces more enzymes than usual. Fluid also flows into your small bowel from your blood stream. Experts believe that excess hormones and fluid movement in your small intestine cause early dumping syndrome symptoms.
Producers would be the correct answer.
Producers get energy from the sun and use it for producing