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DNA Structure and Replication

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

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

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DNA Structure and Replication
DNA gyrase in E. coli

can be inhibited with antibiotics
is required only at the oriC site
performs the same function as helicase in eukaryotes
adds positive supercoils to chromosomal DNA

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DNA Structure and Replication
Which of the following is not a structural motif in DNA binding proteins?

bZIP
TFIID
zinc finger
helix-turn-helix

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DNA Structure and Replication
30 nm wide helix with five or six nucleosomes per helix is known as

halonoid
solenoid
none of these
kinoplast

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

dTTP
dGTP and dCTP
dATP
all of these

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DNA Structure and Replication
What is the name given to the points at which a DNA helix is unwound and new strands develop?

Okazaki fragments
Replication origins
Leading strands
Replication forks

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