In selection of recombinants by inactivation of lac `z^(1)` gene the common vectors used are
1. pBR322
2. pUC18
3. Both
4. None

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

The orthogonal projection A' of the point A with position vector (1, 2, 3) on the plane 3x-y+4z=0 is

In the process of insertional inactivation 1) a recombinant DNA is inserted within the coding sequence of enzyme β -galactosidase, resulting in inactivation of the enzyme 2) a recombinant DNA is inserted within the coding sequence of proteins involved in the replication of the plasmid 3) a recombinat DNA is inserted within the recongnition site for EcoRl 4) none of these

Which of the following is not a cloning vector ? 1) Cosmid 2) pBR 322 3) Sall 4) Phagemid

Read the given statements and select the correct option. Statement 1 : The cloning vector is required to have very few, preferably single, recongnition sites for the commonly used restriction enzymes. Statement 2: Presence of more than one recongnition sites within a cloning vector will generate several fragments, which will complicate the process of gene cloining. 1) Both statements 1 and 2 are correct 2) statement 1 is correct but statement 2 is incorrect 3) statement 1 is incorrect but statement 2 is correct 4) None of the above

Morgan hybridised yellow-bodied, white-eyed females to brown-bodied red-eyed males and intercrossed their F_(1) progeny. He observed that (a) F_(2) ratio was deviated very significantly from the 9:3:3:1 ratio (b) Both genes did not segregate independently of each other (c) Recombinant types are not obtained in F_(2) generation (d) Both genes segregate independently of each other Select the correct set of statements :

The gene 'rop' present in pBR322 cloning vector, codes for 1) the proteins involved in the translation 2) the proteins involved in the replication of the plasmid 3) the proteins involved in the synthesis of ampicillin only 4) the proteins involved in the synthesis of tetracycline only

Select the two correct statements out of the four (1-4) given below about lac operon. 1. Glucose or galactose may bind with the repressor and inactivate it 2. In the absence of lactose the repressor binds with the operator region 3. The z-gene codes for permease 4. This was elucidated Francois Jacob and Jacque Monod The correct statements are :

Read the given statements and select the correct option. Statement 1 : The tumour inducing plasmid (Tiplasmid) acts as a cloning vector in recombinant DNA technology. Statement 2: The Ti plasmid which is used in the mechanisms of delivering genes to a cell remains pathogenic.

Statement - 1 : Biolistics method of gene transfer is an example of direct gene transfer. Statement - 2 : In biolistics method , pBR322 is used.