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Ede4ka [16]
3 years ago
9

An important polysaccharide is missing from the chart. It is made by animals as their storage polysaccharide, and is found mainl

y in muscle and liver and called
Biology
1 answer:
Molodets [167]3 years ago
4 0

Answer:

The answer is D ) Glycogen

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Why can’t the world run out of carbon
IgorC [24]

Answer:Simple carbon is everything that is alive dead man even the planet over time became part carbon dioxide

Explanation:it just is

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3 years ago
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If an abnormal rearrangement or alignment of the bones results from a fracture, it is called a __________ fracture.
Naddika [18.5K]

The displaced fracture is caused when the bone breaks into two or more parts and the bones are no longer in alignment with each other. These broken bones becomes abnormally arranged. Normally, these fractures are caused due to trauma. The bone breaks or cracks, and gets displaced from its original position, and then it gets arranged in the abnormal position.

Hence, the blank can be filled with 'displaced'.

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3 years ago
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The surface area of a sphere can be approximated as follows:
Gnom [1K]

Answer:

The surface area of a sphere = 48 ²

Explanation:

Given:

The radius of a sphere = 2 meters

Use π = 3 (Approx)

Find:

The surface area of a sphere.

Computation:

⇒ The surface area of a sphere = 4πr²

⇒ The surface area of a sphere = 4(3)(2)²

⇒ The surface area of a sphere = 4(3)(4)

⇒ The surface area of a sphere = 48 meter²

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3 years ago
A larger population density always indicates a larger population size. True or False
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False

Many people can live in one area, but have close to no one living somewhere else. 
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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.

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