DNA synth Flashcards

1
Q

What reaction does DNA ligase catalyse?

A

formation of phosphodiester bond between the 5’-phosphate and 3’ hydroxyl ends

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2
Q

What is Chargaff’s rule?

A

the ratio of purines to pyramidines is always 1

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3
Q

Around how many histones does DNA wrap itself?

A

8 histones

which DNA wraps 1.65 times

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4
Q

What is a chromatosome?

A

Nuclesome + H1 histone

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5
Q

What size is the chromatin fibre?

A

11nm diameter

100 kD

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6
Q

What is the average length of a loop?

A

300 nm

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7
Q

What happens in the elongation phase of translation?

A

aminoacyl-tRNA binds A site
peptide bond forms
mrna-trna translocates on ribosome

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