Question

Antiparallel strands of a DNA molecule means
that
(a) the phosphate groups of two DNA strands,
at their ends share the same position
(b) the phosphate groups at the start of two
DNA strands are in opposite position (pole)
(c) one strand turns clockwise
(d) one strand turns anti-clockwise

Answer 1

Answer:

Antiparallel strands of a DNA molecule means that the phosphate groups at the start of two DNA strands are in opposite position (pole)

Answer 2

(b) the phosphate groups at the start of two  DNA strands are in opposite position (pole)

Explanation:

In 1953, based on the X-ray diffraction data James Watson and Francis Crick proposed a very simple but famous Double Helix model for the structure of DNA ( Deoxyribonucleic acid). DNA is composed of two polynucleotide chains or strands which runs antiparellel to each other, where the backbone is constituted by sugar-phosphate. Antiparellel strands of a DNA molecule means that the phosphate groups at the starts of two DNA strands are in opposite position (pole).