In Ti-plasmid, which of the following is removed:

Which of the following genetically engineered microbe is used in scavening of oil spills by digesting hydrocarbons of crude oil?

Dextran is used in

Which of these is widely used in genetic engineering

Read the following four statements $(A-­D)$ about certain mistakes in two of them.

$(A)$ The first transgenic buffalo, Rosie produced milk which was human alpha­ lactalbumin enriched.

$(B)$ Restriction enzymes are used in isolation of $DNA$ from other macromolecules.

$(C) $ Downstream processing is one of the steps of $rDNA$ technology.

$(D)$ Disarmed pathogen vectors are also used in transfer of $rDNA$ into the host.

Which of the two statements have mistakes ?