Podcast
Questions and Answers
Who proposed the structure of DNA that included two chains of nucleotides spiraling around each other in a pair of right-handed helices?
Who proposed the structure of DNA that included two chains of nucleotides spiraling around each other in a pair of right-handed helices?
Watson and Crick
What was the erroneous proposal by Linus Pauling regarding the composition of DNA?
What was the erroneous proposal by Linus Pauling regarding the composition of DNA?
Linus Pauling suggested that DNA was composed of three nucleotide strands.
In a right-handed helix, which direction does each strand follow as observed from the central axis of the molecule?
In a right-handed helix, which direction does each strand follow as observed from the central axis of the molecule?
Clockwise path
How are the two chains comprising one double helix oriented in relation to each other?
How are the two chains comprising one double helix oriented in relation to each other?
Where is the -sugar-phosphate-sugar-phosphate- backbone located within the DNA molecule?
Where is the -sugar-phosphate-sugar-phosphate- backbone located within the DNA molecule?
What gives the DNA molecule a large negative charge?
What gives the DNA molecule a large negative charge?
What are the forces that provide stability for the entire DNA molecule?
What are the forces that provide stability for the entire DNA molecule?
How are the two strands of DNA held together?
How are the two strands of DNA held together?
What is the width of the DNA double helix?
What is the width of the DNA double helix?
What is the specific pairing rule between pyrimidines and purines in DNA?
What is the specific pairing rule between pyrimidines and purines in DNA?
Why are adenine and thymine, as well as guanine and cytosine, the only possible base pairs in DNA?
Why are adenine and thymine, as well as guanine and cytosine, the only possible base pairs in DNA?
What was the result of Chargaff's base composition analysis that was communicated to Watson and Crick?
What was the result of Chargaff's base composition analysis that was communicated to Watson and Crick?
Flashcards
DNA structure
DNA structure
Two nucleotide chains spiraling around each other in a right-handed helix.
DNA chains orientation
DNA chains orientation
Antiparallel - the two strands run in opposite directions.
DNA backbone location
DNA backbone location
On the outside of the DNA molecule.
DNA negative charge
DNA negative charge
Signup and view all the flashcards
Base pairing rule
Base pairing rule
Signup and view all the flashcards
DNA stability forces
DNA stability forces
Signup and view all the flashcards
DNA base pairing
DNA base pairing
Signup and view all the flashcards
DNA helix width
DNA helix width
Signup and view all the flashcards
Chargaff's findings
Chargaff's findings
Signup and view all the flashcards
Watson-Crick model
Watson-Crick model
Signup and view all the flashcards
Incorrect DNA Model
Incorrect DNA Model
Signup and view all the flashcards
DNA strand direction
DNA strand direction
Signup and view all the flashcards
