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scoundrel [369]
3 years ago
14

What scale is used to measure the intensity of an earthquake?

Biology
2 answers:
Slav-nsk [51]3 years ago
5 0
Pretty sure its Ph scale i did a question like this once but i cant remember....its either Ph or richer
igor_vitrenko [27]3 years ago
4 0

The answer is (D) Richter scale.

The pH scale is used to measure acid/alkalinity

The Moh's scale is used to find out how hard a mineral is.

The Kelvin scale is a unit of measure of temperature.

Therefore, the only answer is D.

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DNA Polymerase helps copy a DNA molecule during the process of what?
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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

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Drag and drop the steps of digestion to order them from first to last step.
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