DNA lab notes and worksheet Q&A's
Terms in this set (20)
why is DNA so important in biology?
DNA holds our genetic information
what is the function of DNA?
to pass on its instructions to their offspring for reproduction
what is one reason why humans and other animals need to have protein-cutting enzymes?
to unwind and separate the DNA from the protein to begin the DNA replication process
what are the 3 components of a nucleotide are?
which component of each nucleotide accounts for the "deoxyribo" part of the name?
the sugar accounts for this part
the sugar of one nucleotide is bonded to the __ in the next nucleotide
the __ of the nucleotides in each strand of DNA extend toward each other in the center of the DNA double helix molecule
what is the base-pairing rules
A is always paired to T
G is always paired to C
what is the only characteristic that differ between these segments of DNA from plant, mammals, and bacterium?
the sequence and or order of the bases
why is DNA replication necessary before each cell division?
to make two new molecules that will replace the old cells before cell division
each new nucleotide added by the enzyme DNA __ matches the corresponding nucleotide in the old strand of DNA, in accord with the __ rules
which cells in your body contain DNA?
why do these cells need DNA?
so cells can function correctly and reproduce
explain why you think
strawberries contain DNA
fossils- because it was once a living organism
meat- came from a living organism
spinach- a plant and plants have cells that contain DNA
strawberries- a living plant
describe the function of DNA polymerase
it helps make new strand by adding nucleotides one at a time
explain why each part of the name DNA polymerase (DNA, polymer, -ase) makes sense
-ase: an enzyme - so it catalyzes a chemical reaction
polymer- means it catalyzes the formation of a polymer
DNA- means the polymer whose formation it catalyzes is DNA -
DNA is a polynucleotide
the product of mitosis are
2 genetically identical diploid daughter cells
the product of meiosis are
4 genetically different haploid cells
which of the following functions is not properly method with the stage of mitosis where the function occur?
DNA synthesis- prophase
how many chromosomes in the red box? How many molecules?
2 chromosomes and 4 molecules