OBJECTIVE LIFE SCIENCE
BIOTECHNOLOGY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Using a microscope
|
|
|
Using PCR
|
|
|
Using scissors
|
|
|
Using enzymes
|
Detailed explanation-1: -Scientists currently delete genes by manipulating a process known as homologous recombination. Nucleotide sequences change places with the target gene during homologous recombination and are left behind as a genetic scar, undermining the effectiveness of subsequent deletions.
Detailed explanation-2: -Cutting and pasting DNA A common method uses two types of enzymes: restriction enzymes and DNA ligase. A restriction enzyme is a DNA-cutting enzyme that recognizes a specific target sequence and cuts DNA into two pieces at or near that site.
Detailed explanation-3: -What would a scientist need to do before he or she could remove a gene from a chromosome? The scientist must know the sequence of the gene. Which restriction enzyme(s) would you use to cut out the p53 gene?
Detailed explanation-4: -Geneticists use maps to describe the location of a particular gene on a chromosome. One type of map uses the cytogenetic location to describe a gene’s position. The cytogenetic location is based on a distinctive pattern of bands created when chromosomes are stained with certain chemicals.