Question

A man uses a crowbar of length 1.5 m to raise a
load of 75 kgf by putting a sharp edge below the bar
at a distance of l m from his hand. (a) Draw a
diagram of the arrangement showing the fulcrum (F).
load (L) and effort (E) with their directions. (b) State
the kind of lever. (c) Calculate : (1) load arm,
(ii) effort arm, (iii) mechanical advantage, and
(iv) the effort needed.​

Answer 1

Answer:

DNA is essentially an extremely long double-stranded rope in which the two strands are wound about one another. As a result, topological properties of the genetic material, including DNA underwinding and overwinding, knotting, and tangling, profoundly influence virtually every major nucleic acid process.