Chromosome and DNA MCQs

Chromosomes 1st observed by Walther Fleming

Chromosomal theory of inheritance 1st formulated by Walter Sutton

1st evidence of hereditary nature of DNA provided by Friedrich Meischer

Sex chromosomes discovered by Thomas Hunt Morgan

2 chromatids +1 centromere +secondary constriction

1 chromatids + 1 centromere + primary constriction

2 chromatids + 1 centromere + primary constriction

2 chromatids + 2 centromere + secondary constriction

40% protein and 60% DNA

50% protein and 50% DNA

70% protein and 30% DNA

60% protein and 40% DNA

240 million

140 million

150 million

160 million

Valine and lysine

Arginine and lysine

Valine and arginine

Histidine and threonine

Euchromatin

Heterochromatin

Biochromatin

Nucleochromatin

Mutation

Transduction

Replication

Variation

P.A.Levene

Frederick Griffith

Friedrich Miescher

Rosalind Franklin

Purines (A and G) pyrimidines (U and C)

Purines (T and C) pyrimidines (A and G)

Purines (A and C) pyrimidines (U and G)

Purines (A and G) pyrimidines (T and C)

A forms two bonds with T

G forms three bonds with C

A forms three bonds with T

Both a and b