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DNA Structure and Replication

DNA Structure and Replication
The site on a bacterial chromosome that marks the initiation point for chromosome replication is called

an initiation codon
Pro
Ori
a promoter

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DNA Structure and Replication
DNA segments capable of moving from one place in the genome to another is known as

introns
transposons
retrovirus
moving elements

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DNA Structure and Replication
In DNA, guanine pairs with

Adenine
Uracil
Thymine
Cytosine

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DNA Structure and Replication
In the study of one experiment it was found that the value of Tm for DNA is = 40° C. If the cell has 20% GC at the above Tm, then what will be value of 'Tm' if the GC% increases to 60%?

Remains same
Increases
Can not be compared
Decreases

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DNA Structure and Replication
During conventional transformation experiments E. coli cells and plasmid DNA interacts in an environment of

low temperature and Mg++
low temperature and Ca++
high temperature and Mg++
high temperature and Ca++

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DNA Structure and Replication
What does ligase do during replication of DNA?

Makes copies of mRNA from DNA
Joins nicks in DNA strands
Synthesizes the lagging strand
Digests mRNA when it is no longer needed

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