Answer:
d. a single nucleotide insertion downstream of, and close to, the start of the coding sequence.
Explanation:
A <u>single nucleotide insertion downstream and close to the start of coding sequence will produce the most harmful effect</u> among all these given options because it will cause the <u>entire reading frame to shift in the beginning itself leading to insertion of wrong amino acids in the entire polypeptide chain</u>, hence the entire protein will have extremely different amino acids than the original protein was supposed to have and such <u>protein will be dysfunctional. </u>
In option (a), it is given that the three nucleotides near the middle of the gene will be deleted. This scenario will produce comparatively less harmful effect because in this case only one amino acid which is coded by this deleted triplet codon will be absent in the polypeptide.
In option (b), a single nucleotide deletion has occurred that too in an intron. It will produce <u>no harmful effect in case of eukaryotes</u> because introns are ultimately removed before translation so the amino acids in the polypeptide will remain the same. In case of prokaryotes such deletion may cause some harmful effect in case of mRNA only because introns in prokaryotic mRNA are not removed. But, if the mRNA is for <u>prokaryotic tRNA and rRNA </u>then there will be no harmful effect because they undergo processing in which introns are removed.
In option (c) also there will be very less harmful effect because deletion is occurring near the end of coding sequence which will lead to insertion of wrong amino acid in the polypeptide at the end of polypeptide chain that means very less abnormal amino acids will be present so effect will be less harmful.
It is obviously A because the best flower is an opinion and opinions are not scientific
Wait what????? How many light years!?
Answer:
C. Some bacteria.
Explanation:
Firstly here, nitrates bacteria turn ammonia compounds into nitrites by combining them with oxygen.(Nitrites are chemicals with less oxygen in their molecules than nitrates).
Secondly, nitrate bacteria combine nitrites with more oxygen to form nitrates. By this sequence, nitrogen in proteins is changed into a form which can be absorbed by plant roots. The same series of bacteria also form nitrates out of the nitrogen-containing compounds in animal droppings and urine.
Recently fixed ammonia is then converted to biologically useful forms by specialized bacteria.
Answer:At low temperatures, an increase in temperature increases the rate of an enzyme-catalyzed reaction. At higher temperatures, the protein is denatured, and the rate of the reaction dramatically decreases.
Explanation:Temperature Effects. Like most chemical reactions, the rate of an enzyme-catalyzed reaction increases as the temperature is raised.
