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DNA Structure and Replication

DNA Structure and Replication
What is the IUPAC code for an A, C, T ambiguity in a nucleic acid sequence?

B
None of these
S
H

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DNA Structure and Replication
In DNA double helix, the two DNA chains are held together by

None of these
hydrogen bonds between the pair of bases
ionic bonds between the pair of bases
covalent bonds between the pair of bases

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DNA Structure and Replication
Which will require a higher temperature to denature?

RNA with a high A-T content
RNA with a high G-C content
DNA with a high G-C content
DNA with a high A-T content

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DNA Structure and Replication
Deoxyribonucleoside triphosphates, being need in the chain termination methods are

dATP
all of these
dTTP
dGTP and dCTP

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DNA Structure and Replication
Which of the following would not contain DNA?

Mold
Yeast
Bacteria
Glass crystals

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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 topoisomerase
DNA helicases

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