Answer:
Option
Explanation:
Beta-galactosidase is a protein encoded by the lacZ gene and the process of alpha complementation is used in identifying the vector recombinant,
The insertion of the target DNA fragment into a vector; whose inactive beta galctosidase has been made functional by adding an alpha peptide will disrupt the complementation process and then render the protein non-functional such that the transformed bacteria cells becomes sensitive to antibiotic treatment and then proceed to form white colonies in the presence of X-gal. While cells that have plasmids with DNA inserts will remain resistant and form blue colonies in the presence of X-gal.
The presence of limestone<span> and other calcium carbonate rock in </span>lakes<span> and streams helps to maintain a constant pH </span>because<span> the minerals react with the excess </span>acid<span>. However, </span>acid rain<span> eventually can overcome the buffering capacity of the surface water.
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Hornworts get their name from their sporophytes which stick up like horns from the gametophytes.
The Sympathetic division and the Parasympathetic division
Answer:
30
Explanation:
The percentage of guanine bases in chicken DNA should be 30 %. This percentage of guanine is different from the human because human and chicken are different species and having a lot of difference in the percentage of all four bases. The percentage of guanine base in human DNA should be 10 percent lower which is 20 % as compared to chicken that is 30 %.
