The two polynucleotide chains in DNA are
A. Parallel
B. Discontinuous
C. Antiparallel
D. Semi-conservative
Answer
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Hint: In DNA, the opposite strands contain complementary bases. In a double-stranded DNA, one strand runs in the direction while the other runs in i.e. the reverse direction.
Complete answer: DNA forms a double helix and nucleotides form the structural base of it. DNA has two strands with complementary nitrogen bases.
One of these strands runs in direction while the other runs in the reverse direction . They run in opposite directions but remain parallel.
In other words, the two polynucleotide chains are antiparallel to each other.
Their nitrogen bases project inward; these are joined by hydrogen bonds.
So, the correct option is C. Antiparallel
Note: DNA is a nucleic acid chain composed of deoxyribose sugar.
Francis Crick, J.D. Watson along with Rosaline Franklin had prepared a three-dimensional DNA model.
The antiparallel strands of DNA twist around a common axis to form the complete three-dimensional DNA structure- the double helix. It is known as the staircase model.
Complete answer: DNA forms a double helix and nucleotides form the structural base of it. DNA has two strands with complementary nitrogen bases.
One of these strands runs in
In other words, the two polynucleotide chains are antiparallel to each other.
Their nitrogen bases project inward; these are joined by hydrogen bonds.
So, the correct option is C. Antiparallel
Note: DNA is a nucleic acid chain composed of deoxyribose sugar.
Francis Crick, J.D. Watson along with Rosaline Franklin had prepared a three-dimensional DNA model.
The antiparallel strands of DNA twist around a common axis to form the complete three-dimensional DNA structure- the double helix. It is known as the staircase model.
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