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dedylja [7]
3 years ago
9

What is the name of the muscle located beneath the rib cage that enables breathing?

Biology
1 answer:
Doss [256]3 years ago
8 0

Its called a Diaphragm, It's located below the lungs

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In your laboratory journal, describe the two tools of molecular biology that are often described as the scissors and glue for ma
MatroZZZ [7]

The "scissors" of the molecular biology are: DNA Restriction enzymes.

A restriction enzyme is a protein capable of cleaving a DNA fragment at a characteristic nucleotide sequence called a restriction site. Each restriction enzyme thus recognizes a specific site. Several hundred restriction enzymes are currently known.

Naturally present in a large number of species of bacteria, these enzymes have become important tools in genetic engineering.


The "glue" of the molecular biology are: DNA ligase

In molecular biology, DNA ligases are ligase-class enzymes that catalyze the formation of a phosphodiester bond between two segments of DNA. DNA ligases are involved in several essential cellular processes of DNA metabolism: in DNA replication, suture of Okazaki fragments, and in DNA repair and homologous recombination.


The use of these tools in molecular biology: Cloning

Molecular cloning is one of the bases of genetic engineering. It consists of inserting a DNA fragment (called insert) in an appropriate vector such as a plasmid for example. The new plasmid thus created will then be introduced into a host cell, generally the Escherichia coli bacterium. This will then be selected and multiplied to obtain a large amount of the plasmid of interest. Cloning a gene involves inserting it into a plasmid. A clone will be the bacterial transformant that contains this particular plasmid. In this case we speak of clone because all the individuals of the bacterial colony are genetically identical. Molecular cloning is thus different from reproductive cloning (creating an individual genetically identical to another but of a different age) or therapeutic cloning (making tissues from stem cells to perform transplants compatible with the recipient).

Molecular cloning requires restriction enzymes capable of cleaving the DNA, and DNA ligase capable of re-gluing the DNA fragments. Ligase was isolated for the first time from T4 bacteriophage. This enzyme is involved in the repair and replication of DNA. It can bind DNA fragments with compatible sticky ends. At higher concentration, this enzyme is also able to bind two ends of DNA as shown here. T4 DNA ligase works using ATP and Mg ++. It has an activity optimum of 16 ° C, but remains active at room temperature.

7 0
3 years ago
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Why is water pollution a concern if water is continuously cycled through Earth’s systems?
erica [24]
Because some surface water might turn into ground water and some channels are there and it might go into a large body of water
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3 years ago
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Which set of alleles is purebred recessive?<br> A) aa<br> B) Aa<br> C) AA
emmasim [6.3K]

Answer:

aa

Explanation:

the answer is pretty obvious it would be a a because a dominant allele would be to Capitol a and a lower capital a and one capital a would be a mix and a purebred would be to lowercase A's

7 0
2 years ago
Classify the following items based on the type of polymer they are made from raincoats and leather shoes.
Verdich [7]
 <span>Leather shoes are made from natural polymers; raincoats are made from synthetic polymers. </span>
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What do you think has been the
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kjkhjhjhhhj

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