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olya-2409 [2.1K]
3 years ago
9

What was the function and importance of S-necked flasks in Louis Pasteur’s experiments in disproving spontaneous generation?

Biology
1 answer:
stich3 [128]3 years ago
5 0

Answer:

The S naked flasks allowed the air to pass into the flask, but the curve design retained any airborne microorganism that contaminate the broth

Explanation:

  • The theory of spontaneous generation supported the idea that new living organisms arise spontaneously from non living matter.
  • This theory was disapproved by the experiments conducted by Louis Pasteur.
  • In his set of experiments, Pasteur took two flasks in which he added nutrient broths.
  • He bent the neck of the flasks containing the broth into an S-shape and then boiled the broth in order to kill any microbe that was present in the broth.
  • After this, Pasteur broke off the S shape neck of one flask but not the other. This led the first flask to come into contact with air and also allowed microbes and dust particles to contaminate the broth.
  • After a few days, it was observed that the broth in the broken neck flask became cloudy indicating microbial growth while the broth in the other S-shaped neck flask showed no growth.
  • This was possible because the <em>S shaped neck flask did not allow any microbe to contaminate the broth. </em>

<em></em>

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During transcription, a DNA sequence is read by RNA polymerase, which produces a complementary, antiparallel RNA strand. If the transcribed gene encodes a protein, the result of transcription is messenger RNA (mRNA), which produces protein in the process of translation.

During translation, a cell decodes the mRNA and assembles the a new polypeptide chain. The tRNA translates the sequence of codons on the mRNA strand. The tRNA transfers a free amino acid from the cytoplasm to a ribosome, where it is attached to the new polypeptide chain. tRNAs continue to add amino acids to the new end of the polypeptide chain until they reach a stop codon on the mRNA. The ribosome then releases the completed protein into the cell.

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An increase in chemical complexity always requires an investment of energy, considering that building a larger molecule implies bonding more reagents or precursor into the final product. Thus, the increase in the energy content of the product (in this case the lipase) when comparing to each precursor (individuals amino acids) will be reflected in the linking (covalent) bonds between amino acids. Of course, there is always a certain amount of energy that is lost as heat during any chemical transformation (not all the energy invested in the synthesis will be captured in the product).

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