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DNA Structure and Replication

DNA Structure and Replication
The 5' and 3' numbers are related to the

carbon number in sugar
length of the DNA strand
the number of phosphates
the base pair rule

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

Xenopus laevis
Arabidopsis thaliana
Strongylocentrotus purpuratus
Saccharomyces cerevisiae

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DNA Structure and Replication
There is a single origin for DNA replication in bacteria. How many origins of replication are found in the much larger genomes of eukaryotes such as mammals?

One
Thousands and tens of thousands
none of these
About 100

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DNA Structure and Replication
TM refers to the temperature at which

membranes are 50% fluid
50% of a DNA molecule is denatured
All of these
50% of a protein molecules are denatured

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DNA Structure and Replication
Proteins which help to open the double helix for DNA synthesis are

single stranded binding proteins
ligase
DNA helicases
DNA topoisomerase

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DNA Structure and Replication
What is the range of melting point temperatures (Tm) for most DNA molecules?

60 to 80°C
50 to 60°C
80 to l00°C
70 to 90°C

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