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Crawford G Ch 9

Genetics Chapter 9 - Molecular Structure of DNA

QuestionAnswer
molecular genetics an examination of DNA structure and function at the molecular level
nucleic acids macromolecules composed of repeating nucleotide units
adenine a purine base found in DNA and RNA that base-pairs with thymine
guanine a purine base found in DNA and RNA that base-pairs with cytosine in DNA
thymine a pyrimidine base found in DNA that base-pairs with adenine in DNA
cytosine a pyrimidine base found in DNA and RNA that base-pairs with guanine in DNA
uracil a pyrimidine base found in RNA
base pairs the structures in which two nucleotides in opposite strands of DNA hydrogen bond with each other
complementary describes sequences in two DNA strands that match each other according to the AT/GC rule
antiparallel an arrangement in a double helix in which one strand is running in the 5' to 3' direction, while the other strand is 3' to 5'
grooves in DNA, the indentations where the atoms of the bases are in contact with the surrounding water
RNA an alternative genetic material in some viruses
purines adenine and guanine
deoxyribose the five-carbon sugar in DNA
pyrimidines cytosine and thymine
nucleotides the repeating structural units of nucleic acids
strand nucleotides linked by phosphodiester bonds
double helix two interacting strands of DNA
phosphodiester linkage the name of the bond that connects two nucleotides in a strand
Created by: akcrawford