True or false? Do most dead organisms become fossils?

1 answer:

7 0

Only a tiny percentage of organisms becomes fossils. Soft-bodied organisms are the least likely to become fossils. Quick burial is almost always essential for remains to become fossils.

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Put the steps to produce spider silk protein in yeast in the correct order. 1 Purify protein. 2 Join yeast regulatory sequence a

Anuta_ua [19.1K]

<h2>The correct sequence is: 4>2>3>5>1.</h2>

Explanation:

The given question shows the sequence in which silk encoding gene from spider can be expressed in yeast in order to produce Recombinant Silk.
Originally, silk can be obtained from spider. But for the commercial production and meeting the high demand of silk it is not economical to depend on spider to produce silk as they not only take long time to produce silk them but also they have a longer life-cycle and longer generation time as a result of which the quantity of silk obtained by spider per generation is very low. Also, spiders require specialized habitat and complex nutrient for their survival.
Hence, yeast, an unicellular eukaryote, which has a shorter generation time and simple nutrient requirement for its survival, can be used for the commercial production of silk.
For this, initially a yeast gene which is constitutively expressed in yeast is selected and the coding region of this gene is removed with the help of enzymes, keeping the regulatory sequences like the promoter, enhancer, terminator, etc, intact in the 5' and 3' region of the gene.
A constitutive gene is the one which is expressed continuously at large amounts. This will result in the increased synthesis of the recombinant silk protein.
Next, the coding sequence of the gene encoding for silk protein which is obtained from the spider is joined with the help of enzymes to the regulatory gene sequences of the yeast which was obtained in the first step.
Next, this recombinant gene comprising of the yeast regulatory sequence and the coding region of the gene encoding for silk obtained from spider is inserted into the yeast cells.
Next, the yeast cells are allowed to express the silk coding gene by the process of transciption and translation utilizing the yeast specific RNA (Ribonucleic acid) polymerase (recognizes the yeast-specific promoter and enhancer in the recombinant gene) and yeast-specific ribosome, respectively.
The recombinant silk protein produced in the yeast can then be subjected to purification.

5 0

4 years ago

Helpppp!!!!!! i need this answer now

FrozenT [24]

Answer: C. It is a mixture between a solute and solvent.

Hope this helped!

7 0

3 years ago

Read 2 more answers

they have 20 ____________ backbones derived from a polyunsaturated ____________ called arachidonic acid.

Lana71 [14]

Answer:

first blank is carbon i dk the secon

Explanation:

4 0

3 years ago

The step in Koch's postulates that most critically enabled him to determine that a particular microbe was the cause, and not an

Digiron [165]

Answer:

Cells from the pure culture can cause disease in healthy individual after infecting it with the pure culture.

Explanation:

Koch postulates says that microbes are the cause of every disease. These microbes can be isolated from the infected host and can be grown outside the host in a pure culture. Then this pure culture is able to cause disease in a healthy host after infecting the host with pure culture. Then this same microbe can again be isolated from the second host.

So Koch postulates which proves that cells from the pure culture can cause disease in healthy individuals after infecting it with the pure culture was the step that enabled Koch to determine that a particular microbe is the cause of the disease because it was causing disease in healthy individual also.

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3 years ago

The end-product(s) of aerobic glycolysis is (are):

blagie [28]

The answer is pyruvate.

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3 years ago