Answer:
Explain why high salt concentration can kill organisms?
High salt concentration kills organisms because salts are naturally acidic and high concentration negatively alters the system of organisms
Explanation:
Organisms tends to survive at optimum pH rather than either low or high, high salt concentration affects the biological system of organism, hence; result in its death.
C is the answer :D hope you pass your test
Answer:
his desertion from his role as head of the family
Explanation:
In the play "The Glass menagerie", Tom is frustrated about his life. He has to work hard to support his mother (Amanda) and sister (Laura). He works in shoe warehouse which he hates the most. Further, his mother annoys him because she ask him to improve himself. His father has already deserted his family. He also end up fleeing, as his father did.
Answer:
Replication would not occur on either the leading or lagging strand.
Explanation:
In DNA replication in E. coli, the enzyme primase is used to attach a 5 to 10 base ribonucleotide strand complementary to the parental DNA strand. The RNA strand serves as a starting point for the DNA polymerase that replicates the DNA. If a mutation occurred in the primase gene, replication would not occur on either the leading or lagging strand.
Answer: Option A. "tetracyclines"
Explanation:
Tetracyclines are defined as a group of broad-spectrum antibiotics that are either isolated directly from several species of Streptomyces bacteria or can be synthesised semi-synthetically.
Tetracyclines act as inhibitors of growth rather than killing the infectious agent. Tetracyclines passively diffuse through porin channels present in bacterial membrane. it reversibly bind to the bacterial 30S ribosomal subunit to inhibit protein synthesis and prevents the aminoacyl transfer ribonucleic acid (tRNA) from binding to A site of the ribosome.
Hence, it is proved that tetracyclines bind to 30s ribosomal subunit rather than 50S ribosomal subunit in the ribososmes.