what is the point at which a dna strand is unzipped so that it can form new complimentary strands?
polymerase
nuclease
replication fork
double helix 2 points save answer question 3
which of these is not a function of dna polymerase?
adding base pairs
correcting errors
unwinding the helix
replicating the dna strand 2 points save answer question 4
the molecules of dna produced in replication are
identical
complementary
mutated
connected 2 points save answer question 5
how do cells correct errors in dna that would disrupt their function?
enzymes use the surrounding sections of the dna to determine the correct structure; then they repair the errors by replacing atoms in the existing molecule.
enzymes cut out the erroneous part and then use the complementary dna on the intact strand to add the correct nucleotides.
enzymes use rna that was made before the damage occurred to make a new double strand of dna to insert into the molecule.
the erroneous part has weaker bonds to the dna molecule, so it falls off, and the proper nucleotides are attracted to the gap to repair the damage.
Plz fast biotechnology is a growing field of applied biology. many crops such as corn have been engineered to be resistant to herbicides. therefore farmers can spray these chemicals to kill weeds growing near the crop without worries of killing the crop itself how does this type of biotechnology work? a. by changing the genetic make up of the crops. b. by causing the crops to kill the weeds. c. by changing the type of crops used. d. by changing the location of the crops.