Lecture 11: DNA Structure Flashcards
Water is polar and contains H’s that are ______ _______ in charge.
Partial Positive
What makes the DNA backbone strong?
Phosphodiester bonds
What keeps the chemical letters from falling off the sugars?
N-linked glycosidic bonds
What allows the DNA bases to be accessible when needed?
Weak H bonds
What does the backbone of DNA consist of?
phosphate and 5-carbon sugar connected by phosphodiester bonds
What are the ends of a peptide?
c terminus and n terminus
What are the ends of a DNA strand?
5’ and 3’
The phosphodiester linkage is between the ___ carbon and the ___ carbon on another deoxyribose
3’ and 5’
We saw the phosphodiester bond in the substance ________ ____ located in the ____ ____
teichoic acid; cell wall
To add a nucleotide, DNA polymerases use a nucleoside _________ breaking off of the diphosphate from the nucleoside _________ and subsequent breakdown of the diphosphate is exergonic
triphosphate; triphosphate
The _________ in the nucleoside _________ is slightly positive because it is surrounded by _______ which are partially _______.
phosphorous; triphosphate; oxygens; negative
The triphosphate is connected to the __ carbon of the deoxyribose
5’
The ______ on the __ carbon of the nucleoside monophosphate has a slightly _______ which is attracted to the slightly ______ _________ in the first phosphate group in a nucleoside triphosphate
oxygen; 3’; negative; positive; phosphorous
Strands of DNA are _________ to allow base pairing
antiparallel
In transcription base pairing allows the mRNA to be made from the complementary ___ _____ in a gene
DNA strand
