12 Questions
What is the process by which the DNA code is transcribed into mRNA code?
Transcription
Which nitrogen base is unique to RNA and not found in DNA?
Uracil
What type of bond forms between the ribose sugar of one nucleotide and the phosphate of the nucleotide below it in RNA?
Covalent bond
Which process involves the translation of mRNA code into an amino acid sequence?
Translation
What type of bond is formed between purines and pyrimidines during DNA replication and transcription?
Hydrogen bond
Who discovered the structure of DNA?
James Watson and Francis Crick
In a nucleosome, how many histone proteins form the core around which DNA is wrapped?
8
Which of the following describes the structure of purines and pyrimidines?
Purines are double-ringed structures, while pyrimidines are single-ringed structures.
What is the significance of the 5' to 3' directionality in DNA replication and transcription?
It enables the enzymes involved to add nucleotides in the correct order.
How did the Hershey-Chase experiment provide evidence for DNA as the genetic material?
By showing that radioisotopes can be used to label DNA and protein separately.
What is the role of purine-to-pyrimidine bonding in DNA helix stability?
To stabilize the double helix structure of DNA.
How does the numbering of carbons in ribose and deoxyribose relate to the structure of a nucleotide?
It provides a framework for linking nitrogen bases to the sugar-phosphate backbone.
Learn about the distinction between purines and pyrimidines in the context of DNA structure, specifically focusing on how they form hydrogen bonds during replication and transcription. Explore the significance of the equal length of adenine-thymine and cytosine-guanine pairs in maintaining the three-dimensional structure of the DNA helix.
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