Question

What do you mean by parallel and anti parallel forces?​

Answer 1

Answer:

Two vectors are said to be collinear, if they act along the same line or along parallel lines. So these are the necessary conditions. If collinear vectors act in the same direction, they are known as parallel vectors and if they act in opposite directions, they are known as antiparallel vectors.

Answer 2

Answer:

In biochemistry, two biopolymers are antiparallel if they run parallel to each other but with opposite directionality (alignments). An example is the two complementary strands of a DNA double helix, which run in opposite directions alongside each other.