Antiparallel strands of a DNA molecule means that from Biology Molecular Basis of Inheritance Class 12 Nagaland Board
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Class 10 Class 12

Antiparallel strands of a DNA molecule means that

  • one strand turns anti-clockwise

  • the phosphate groups of two DNA strands, at their ends, share the same position

  • the phosphate groups at thestart of two DNA strands are in opposite position (pole)

  • one strand turns clockwise


C.

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

J.D. Watson and F.H.C. Crick (1953) showed that DNA has a double helical structure with two polynucleotide chains structure with two polynucleotide chains connected by hydrogen bonds and running in opposite directions (antiparallel). The antiparallel strands of a DNA molecule means that the phosphate groups at the start of two DNA strands are in opposite position (pole).

J.D. Watson and F.H.C. Crick (1953) showed that DNA has a double helical structure with two polynucleotide chains structure with two polynucleotide chains connected by hydrogen bonds and running in opposite directions (antiparallel). The antiparallel strands of a DNA molecule means that the phosphate groups at the start of two DNA strands are in opposite position (pole).

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Comment two chains of DNA have antiparallel polarity.

The Two chain of DNA are antiparallel that is
if one chain has 5’ x 3’ polarity the other chain has 3’ x 5’ polarity.
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Name the genetic material for majority of organisms.

DNA (Deoxyribose nucleic acid)
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How many nucleotides are present in a bacteriophage ϕ x 174.

5386
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List the function of RNA.

Functions of RNA
RNA acts as genetic material in viruses
It also functions as an adapter and messenger 
It also acts as a catalytic molecule and catalyses various biochemical reactions.
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List the number of base pairs in :

(i) lambda bacteriophage

(ii) E.coli and

(iii) haploid content of human DNA.


(i) 48502 bp
(ii) 4.6 x 106 bp and
(iii) 3.3 x 109 bp.
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