Answer:
The correct answer is: d. progressive stabilisation of correct secondary structural intermediates, and unfolding of incorrect structures, until the final structure is attained.
Explanation:
- Protein folding is a sequential process and not a random one.
- It is necessary that a protein must fold in such a way that in the end it is able to attain the particular conformation which is required for its function.
- The folding of an amino acid sequence is a process that is thermodynamically favourable.
- This is because in a folded protein the hydrophobic amino acids escapes from interacting with water molecules and hence gets stabilised.
- A folded protein has lower energy and is more stable than a linear polypeptide chain.
- The folding of an amino acid linear chain into a protein takes place in the following way:
- The folding of the amino acid sequence begins during the process of translation of the mRNA (messenger Ribonucleic Acid) by Ribosome. (Co-translational folding)
- This is because initially the linear amino acid sequence forms a secondary structure (alpha helix, beta sheet) which is formed between the nearby amino acid residues.
- These structures form progressively and sequentially and each structure after formation is checked for its correct conformation before the next structure (tertiary structure) is formed.
- If an incorrect folding has occurred, the folded polypeptide chain opens up and refolds until correct orientation is attained.
- Folding, opening and refolding process continues until the correct conformation of the protein is attained.
A) most of them formed thousands of years ago, and will take hundreds of thousands of years to renew.
Explanation:
Fossil fuels were not formed thousands of years ago and will not take hundred of thousand of years to renew.
These resources are non-renewable and they take several million of years to form.
- Fossil fuels are derived from organisms that have been buried rapidly in basins of deposition.
- Rapid burial cuts them off from the oxic environment that degrades them to lose their carbon matter.
- In turn, they turn to organic matter known as kerogen.
- With increasing burial they form hydrocarbons.
- Burial cause temperature and pressure to rise.
- The process takes several millions of years to form.
- No known fossil fuel reserve is several thousands of years.
learn more:
Fossil fuel brainly.com/question/9231468
#learnwithBrainly
Answer:
the axolotl ( say "ax- oh- lot-el") is a Mexican species of salamendar . its also known as mexican walking fish .it can regenerate , repair or replace its arms,legs,tail ,lower jaw ,brain and heart
Explanation:
in reptile involves dropping a section of their tail and regenerating it as part of a defense mechanism
Yes, They all are! They all can be the start of something.
A plant would not grow well in green light because the chlorophyll absorbs mostly red and blue light while allowing green light to be reflect which is why it appears to be green
