Download App

Biotechnology: Principles and Processes — BIOLOGY STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceBIOLOGYBiotechnology: Principles and Processes1 Mark
Question
Before integrating DNA with bacterial plasmid, bacterial cells are treated with calcium. Why?
✓

Answer

DNA is a hydrophillic molecule which can not pass through the cell membrane, so to make it competent to take up DNA, bacterial cells should be treated with divalent cations or calcium so that DNA can enter through the pores of cell wall.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "1 Marks Question" from Biotechnology: Principles and Processes→Biotechnology: Principles and Processes — all question types→BIOLOGY STD 12 Science question papers→Rajasthan Board STD 12 Science question papers→Rajasthan Board question paper generator→

Similar questions

Name the event during cell division cycle that results in the gain or loss of chromosome.
→
Blue-green algae are not yet popular as biofertiliser. Give reason.
→
Occurrence of more than one embryo in a seed, is known as_______.
→
 A DNA molecule in which both strands have radioactive thymidine is allowed to duplicate in an environment containing non-radioactive thymidine. What will be the correct number of DNA molecule that contain some radioactive thymidine after 3 duplications?
→
Write one method of introducing foreign DNA into host cells.
→
When the symptoms of the disease are not clearly visible for molecular diagnosis, then how is it identified?
→
Define species diversity and species richness.
→
Mark the odd one in the following group.
Agrobacterium, RNAi, cryIAc, Meloidegyne.
→
Do you think Mendel's laws of inheritance would have been different, if the characters he chose were located on the same chromosome? Why?
→
The Amazon rain forest is referred to as the lungs of the planet'. Mention any one human activity which causes loss of biodiversity in this region.
→