I Identify the incorrect statement (A) Retroviruses convert common cells to cancerous cells (B) P BR322 is a natural plasmid (C) T-DNA present in Ti plasmid (D) T-DNA transform normal plant cells into tumor

The part of Ti plasmid transferred in plant cell DNA is

A pathogen of several dicot plants which is able to deliver a piece of DNA known as T-DNA to transform normal plant cell into a tumour is :

Choose incorrect statement w.r.t mesophyll cells of C_4 -plants

The part of Ti (tumour inducing) plasmid transferred into plant cell DNA is called :

Select the incorrect statements. (i) Cell wall is the site of energy production in a plant cell. (ii) Lysosomes are the reservoirs of starch, oil and protein granules. (iii) A plant cell becomes turgid due to plasmolysis. (iv) Chemically plasma membrane is composed of fats and lipids. (v) The functional segments of DNA are called genes.

Read the following statements and select the incorrect ones. (i) When the transformed cells on agar plates containing ampicillin are spread, both transformed and untransformed cells with grow. (ii) Restriction enzymes are used in isolation and separation of DNA from other macromolecules. (iii) Downstream processing is one of the steps of rDNA technology. (iv) Disarmed pathogen vectors are also used in transfer of rDNA into the host.

Read the following statements about cancer . Identify the true and false ones and select the correct option . A . Cancer cells lose the property of contact inhibition B. The property of metastasis is mostly found in benign tumors . C. The transformation of normal cells into cancerous cells occurs only because of chemical agents. D. The chemical carcinogen present in tobacco smoke is a major cause of lung cancer.