DNA Flashcards
where is DNA found
within the nucleus of cells called the chromatid network
monomer of DNA
nucleotides
what are nucleotides made up of
a phosphate group, a sugar molecule and a nitrogenous base
what is the bond between nucleotides
phosphodiester bond
types of nitrogenous bases
pyrimidines and purines
pyrimidines
smaller with one section - cytosine, thymine and uracil
purines
bigger with two sections - adenine and guanine
what bonds together to form a nucleotide
the phosphate group of one bond to the deoxyribose sugar of the other
what bond is between two nucleotide strands (crossover)
hydrogen bonds
how many hydrogen bonds between adenine and thymine
two
how many hydrogen bonds between guanine and cytosine
three
dna role
carries information in each cell in the form of genes and provides a blueprint for the growth and development of an organism by coding for protein synthesis
when does dna replication occur
during interphase
non-coding dna
involved in the synthesis of functional rna molecules which have regulatory function and is also involved in forensic science
transcription
process wherby a copy of the gene is synthesized and this copy is called mrna. this process is catalyzed by the enzyme rna polymerase
