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Twisted Ladders
Packing It In
Grab Bag
Copy This!
-ase
100
These form the rails of the DNA ladder.
What are the phosphate-sugar backbones?
100
These are proteins around which DNA loops twice.
What are histones?
100
Daily Double
Use the Genetic Code to find the RNA triplet that corresponds to the amino acid tryptophan (trp).
100
This process refers to each parent strand being incorporated into a new DNA double helix during replication.
What is semi-conservative replication?
100
This enzyme is responsible for reading and copying DNA.
What is polymerase?
200
This type of bond connects the two strands of a DNA double helix.
What is a hydrogen bond?
200
This is the average amount of DNA per cell in meters.
What is two?
200
The process of going from DNA to RNA.
What is transcription?
200
This strand of DNA is copied continuously.
What is the leading strand?
200
This enzyme joins together sections of DNA.
What is DNA ligase?
300
These two scientists discovered the structure of DNA.
Who are Watson and Crick?
300
The approximate number of base pairs in the DNA of a typical human cell.
What is 6 billion?
300
The type of models used by Watson and Crick.
What are stick models?
300
Segments of DNA copied from the lagging strand that need to be joined together.
What are Okazaki fragments?
300
This enzyme opens up the DNA double helix in preparation for replication.
What is DNA helicase?
400
This structure was Linus Pauling's model of DNA.
What is the triple helix?
400
The mechanism by which huge amounts of DNA is twisted into a tiny nucleus.
What is supercoiling?
400
These are intervening sequences that are removed during post-transcriptional modifications.
What are introns?
400
The type of replication that takes place on the lagging strand.
What is discontinuous?
400
This enzyme synthesizes short RNA primers on DNA templates during replication.
What is RNA primase?
500
This is the number of carbon atoms in deoxyribse.
What is five?
500
This consists of a protein and DNA wrapped around it twice to give the beads on a string effect.
What are nucleosomes?
500
The two types of purines found in DNA.
What are adenine and guanine?
500
These molecules bind to unwound DNA to help to hold it open during replication.
What are DNA binding proteins?
500
This enzyme relaxes DNA supercoils ahead of the replication fork, to prevent stress due to opening up the molecule.
What is topoisomerase?