DNA STRUCTURE Flashcards
WHAT MAKES THE RUNGS OF THE LADDER
the base pairings: ACTG
WHAT molecules make the ‘uprights’
deoxyribose and phosphate
why is DNA molecule compared to a ladder
DNA molecule is similar to a ladder as the rungs made by nucleotides and the uprights made by deoxyribose and phosphate sugar in DNA which makes the vertical side piece which is similar to the shape of a ladder.
where is DNA found
found in the nucleus of the cell
complementary base pairings and what determines the pairings
in the DNA molecule: bases are chemically bonded together by hydrogen bonds. These strands hold the molecules together. T and A have 2 hydrogen bonds. C and G have 3 hydrogen bonds
what is a gene
stretch of DNA that codes for proteins
DNA is not made up of
DNA is not a protein but encodes info that is necessary to synthesize proteins
why is DNA not single stranded
the double helix provides structure and support for the DNA molecule
WHERE is DNA located and WHAT does it hold
DNA is located in the nucleus of the cell and holds the genetic code
genotype
gene an individual carries
phenotype
outward appearance of an organism
recessive gene
gene who’s effect is masked by another
dominant gene
gene who masks another genes effect
