Write 'True' or 'False':
Stewart Linn and Werner Arber (1963) isolated two enzymes which restricted the growth of bacteriophage in bacterium E.coli.

Write 'True' or 'False': E.coli is a gram negative bacterium is easy to handle and grow.

Write 'True' or 'False'. biennial are plants which complete their life cycle in two years.

Write 'True' or 'False': Discovery of enzyme Eco R1 led to award of Nobel Prizes to W. Arber, H.Smith and D. Nathans in 1978.

These questions consist two statements each, printed as Assertion and Reason. While answering these questions you are required to choose any one of the following four responses. If both Assertion and Reason are true and Reason is correct explanation of Assertion. If both Assertion and Reason are true but Reason is not correct explanation of Assertion. If Assertion is true but Reason is false. If both Assertion and Reason are false. Assertion:Agrobacterium tumefaciens is popular in genetic engineering because this bacterium is associated with roots of all cereals and pulse crops. Reason: A gene is incorporated in the bacterial chromsomal genome gets automatically transferred to the crop with which the bacterium is associaated.

Two questions consist of two statements each, printed as Assertion and Reason. While answering these questions, you required to choose any one of the following four responses. If both Assertion and Reason are true and Reason is a correct explanation of Association. If both Association and Reason are true and Reasons is not a correct explanation of Assertion. If Assertion is true but Reason is false. If both Assertions and Reason are false. Assertion: DNA segments can be excised by 'molecular scissors or chemical scalpels' what biotechnologists call restriction enzymes. Reason: Restriction enzymes are synthesized by microbes as a defence mechanism are specific endonucleases which are cleave double stranded DNA.

Two questions consist of two statements each, printed as Assertion and Reason. While answering these questions, you required to choose any one of the following four responses. If both Assertion and Reason are true and Reason is a correct explanation of Association. If both Association and Reason are true and Reasons is not a correct explanation of Assertion. If Assertion is true but Reason is false. If both Assertions and Reasongs are false. Assertion: Recognition site should be preferably single and responsive to commonly used restriction enzyme. Reason:In pBR 322 alien DNA is ligated generally in the area of Bam-HI site of tetracycline resistance gene.

These questions consist of two statements each,printed as Assertion and Reason.While asnwering these questions you are required to chose any one of the following four responses. If both Assertion and Reason are true and Reason in correct explanation of Assertion. If both assertion and Reason are true but reason is not correct explanation of Assertion. If Assertion is true but Reason is false. If both Assertion and Reason are false. Assertion:Proteins are commonly called body building biomolecules. Reason:Proteins act as enzymes which regulate the metabolism.

Two questions consist of two statements each, printed as Assertion and Reason. While answering these questions, you required to choose any one of the following four responses. If both Assertion and Reason are true and Reason is a correct explanation of Assertion. If both Assertion and Reason are true and Reasons is not a correct explanation of Assertion. If Assertion is true but Reason is false. If both Assertions and Reasons are false. Assertion:Three main types of restriction endonucleases i.e., Type I, Type II and Type III are known with slightly different mode of action. Reason:In palindromes with rotational symmetry second half of complementary strand in DNA double helix is the mirror image of base sequence in the first half of another strand.

ASSERTION TYPE QUESTIONS : These questions consist of two statements each, printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses. A. If both Assertion and Reason are true and Reason is correct explanation of Assertion B. If both Assertion and Reason are true but Reasou is not correct explanation of Assertion. C. If Assertion is true but Reason is false. D. If both Assertion and Reason are false. Assertion: Grafting is attempted in those plants which show secondary growth. Reason: Cambium during secondary growth show cel division in both stock and scion.

Read the following four statements (A-D) about certain mistakes in two of them: The first transgenic buffalo Rosie produced milk which was human alpha-lactalbumin enriched. Restriction enzymes are used in isolation of DNA from other macro-molecules Downstream processing is one of the steps of R-DNA technology. Disarmed pathogen vectors are also used in transfer of R-DNA into the host.