Home
Class 12
BIOLOGY
The presence of a chromogenic substrate ...

The presence of a chromogenic substrate gives blue coloured colonies of bacteria. Insertional inactivation would stop product of which of the following enzyme such that colonies do not produce any colour.

A

Beta - galactosidase

B

Alpha galactrosidase

C

Alpha lactalbumin

D

All of the above

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Similar Questions

Explore conceptually related problems

Which of the following s-block metals do not impart any colour to the flame-

During insertional inactivation, the presence of a chromogenic substrate gives blue coloured colonies if the plasmid in the bacteria does not have an insert. The blue colour is produced by the enzyme 1) α -glucosidase 2) restriction endonuclease 3) β -galactosidase 4) Taq polymerase

After insertion inactivation of galactosidase gene which type of colonies do not produce any colour ?

Which of the following metal(s) do (es) not give characteristic flame colouration?

Select the wrong statement (a) Presence of chromogenic substrate gives blue color colonies if the plasmid in the bacteria does not have an insert (b) Retroviruses in animals have the ability to transform normal cells into cancerous cells (c) In microinjection, cells are bombarded with high velocity microparticles of gold or tungsten coated with DNA (d) Since DNA is a hydrophilic molecule it cannot pass through cell membranes

Which of the following carbohydrates gives a dark blue colour with iodine?

Read the given statements and select the correct option Statement 1 : In insertional inactivation, blue colour produced by bacterial colonies indicates that the plasmid does not have an insert into the bacterial genome. Statement 2: Presence of insert results into insertional inactivation of beta -galactosidase enzyme and the colonies do not produce any colour. A) Both statements 1 and 2 are correct B) statement 1 is correct but statement 2 is incorrect C) statement 1 is incorrect but statement 2 is correct D) Both statements 1 and 2 are incorrect

Which of the following polysaccharide gives blue colour with lodine

Which of the following compound does not produce green coloured product on thermal decomposition?

Which of the following amino acids do not give purple colour on reaction with ninhydrin ?