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Usimov [2.4K]
2 years ago
8

Ideally, an observatory is located where nothing is present to interfere with incoming starlight. Which of these sites would be

best for fulfilling this condition? F a desert far from any large cities G a small island far out in the ocean J H a platform on the surface of planet Venus a space platform orbiting above Earth's atmosphere​
Biology
1 answer:
Ivahew [28]2 years ago
3 0

Answer:

I believe it would be the one orbiting above the atmosphere or on Venus

Explanation:

There are no artificial/man-made interferences and being outside of the Earth's atmosphere more starlight can reach the observatory.

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The lactose (lac) operon in E. coli is an example of a repressed gene when lactose is not available in a cell. In 3-5 sentences
irakobra [83]

Answer:

Please find the detailed explanation of this statement below

Explanation:

Firstly, a repressed gene is a gene whose expression has been inhibited or repressed. The lac operon in E.coli bacteria is a regulatory unit containing structural genes, a single promoter and operator regions. The promoter is the region where the transcription enzyme (RNA polymerase) binds to in order to transcribe the genes in the lac operon. The structural genes in the lac operon can only be expressed in the presence of lactose sugar.

However, in the absence of lactose, LAC REPRESSOR, which is a transcription factor (protein), prevents the binding of RNA polymerase to the PROMOTER region by binding to the OPERATOR region of the lac operon. This inhibits the expression of the lactose genes in the operon.

Note that, the structural genes in the lac operon (lacZ, lacY, lacA) code for proteins that help break down lactose sugar for energy in the E.coli bacteria. Therefore, a bacteria cell with a repressed lac operon will be unable to degrade lactose sugar.

4 0
3 years ago
Explain how mutations can alter a DNA strand and ultimately a protein structure. Make sure to include point mutation, frameshift
Aleksandr [31]

Answer:

By changing a gene's instructions for making a protein, a mutation can cause the protein to malfunction or to be missing entirely. When a mutation alters a protein that plays a critical role in the body, it can disrupt normal development or cause a medical condition

Explanation:

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Answer:

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