Advertisements
Advertisements
प्रश्न
Give a reason for the following:
DNA cannot enter directly into the host cell.
Advertisements
उत्तर
- DNA is a hydrophilic molecule that is negatively charged. The cell membrane (plasma membrane) is hydrophobic.
- It is mostly composed of lipids, which prevent hydrophilic molecules like DNA from crossing the cell membrane.
APPEARS IN
संबंधित प्रश्न
Rearrange the following in the correct sequence to accomplish an important biological reaction:
(a) In vitro synthesis of copies of DNA of interest
(b) Chemically synthesized oligonucleotides
(c) Enzyme DNA-polymerase
(d) Complementary region of DNA
(e) Genomic DNA template
(f) Nucleotides provided
(g) Primers
(h) Thermostable DNA-polymerase (from Thermus aquaticus)
(i) Denaturation of ds-DNA
Name the genes responsible for making Bt cotton plants resistant to bollworm attack. How do such plants attain resistance against bollworm attacks? Explain.
What does PCR stand for? Describe the different steps of PCR
The biological scissor is ______.
Give the applications of the PCR technique.
Write a short note on Electrophoresis.
Explain the mechanism of action of restriction endonucleases that makes them suitable for genetic engineering.
The enzyme nuclease hydrolyses ______ of polynucleotide chain of DNA.
Importance of PCR.
Assertion: In a bioreactor, it is not necessary to maintain sterile ambience.
Reason: Sterile conditions promote the growth of unwanted microbes in the culture medium.
