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Alex
3 years ago
14

Choose a type of environmental impact and write your own scenario of what happened.

Biology
1 answer:
Nastasia [14]3 years ago
7 0

Answer:

Deforestation

Explanation:

people cut down trees to use for paper shelter and heat . when they over do it and clear a large part of the forest its clased deforestation.

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Anyone Know The Answers For These ?
Natalija [7]
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3) all
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3 years ago
DNA Polymerase helps copy a DNA molecule during the process of what?
PtichkaEL [24]
The DNA polymerases are enzymes that create DNA molecules by assembling nucleotides, the building blocks of DNA. These enzymes are essential to DNA replication and usually work in pairs to create two identical DNA strands from one original DNA molecule. During this process, DNA polymerase “reads” the existing DNA strands to create two new strands that match the existing ones.

Every time a cell divides, DNA polymerase is required to help duplicate the cell’s DNA, so that a copy of the original DNA molecule can be passed to each of the daughter cells. In this way, genetic information is transmitted from generation to generation.

Before replication can take place, an enzyme called helicase unwinds the DNA molecule from its tightly woven form. This opens up or “unzips” the double stranded DNA to give two single strands of DNA that can be used as templates for replication.

DNA polymerase adds new free nucleotides to the 3’ end of the newly-forming strand, elongating it in a 5’ to 3’ direction. However, DNA polymerase cannot begin the formation of this new chain on its own and can only add nucleotides to a pre-existing 3'-OH group. A primer is therefore needed, at which nucleotides can be added. Primers are usually composed of RNA and DNA bases and the first two bases are always RNA. These primers are made by another enzyme called primase.

Although the function of DNA polymerase is highly accurate, a mistake is made for about one in every billion base pairs copied. The DNA is therefore “proofread” by DNA polymerase after it has been copied so that misplaced base pairs can be corrected. This preserves the integrity of the original DNA strand that is passed onto the daughter cells.



A surface representation of human DNA polymerase β (Pol β), a central enzyme in the base excision repair (BER) pathway. Image Credit: niehs.nih.gov

Structure of DNA polymerase

The structure of DNA polymerase is highly conserved, meaning their catalytic subunits vary very little from one species to another, irrespective of how their domains are structured. This highly conserved structure usually indicates that the cellular functions they perform are crucial and irreplaceable and therefore require rigid maintenance to ensure their evolutionary advantage.

7 0
3 years ago
What is incomplete dominance?
Tresset [83]
The appropriate answer is D ! in this the dominant allele is not fully dominant ! this is seen in Snapdragon !

so answer is D
7 0
3 years ago
How are plants in a sunny meadow and sulfur bacteria in a deep sea vent alike?
yan [13]
Well it’s obvious that they both use Photosynthesis to make there own food, and also they both use chemosynthesis the produce there own food. Very simple. :)
6 0
3 years ago
Read 2 more answers
__________ and __________ make up the Full Scale IQ score on The Wechsler Intelligence Scale.
Dmitriy789 [7]

Answer:

I believe it would either be A or D hope that helps sorry not much help

3 0
3 years ago
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