DNA Structure and Replication
Which of the following species lack a 'classical' histone H1?

Saccharomyces cerevisiae
Strongylocentrotus purpuratus
Xenopus laevis
Arabidopsis thaliana

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DNA Structure and Replication
Which of the following is used to determine the appropriate stringency (Wallace rule)?

Tm = 4 x (No.of A:T base pair) + 2 x (No.of G:C base pair)
Tm = 4 x (No.of G:C base pair) + 2 x (No.of A:T base pair)
Tm = 69.3° + 0.41 (%)G+C -650/1
Tm = 2 x (No.of G:C base pair) + 4 x (No.of A:T base pair)

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