Read the following four statements $(\mathrm{A}-\mathrm{D}).$
$A.$ The first transgenic buffalo, Rosie produced milk which was human alpha-lactalbumin enriched.
$B.$ Restriction enzymes are used in isolation of $\mathrm{DNA}$ from other macromolecules.
$C.$ Downstream processing is one of the steps of $\mathrm{rDNA}$ technology.
$D.$ Disarmed pathogen vectors are also used in transfer of $\mathrm{rDNA}$ into the host.
Which of the two statements have mistakes?

Which one of the following bacteria is used for production of transgenic plants?

People administered with preformed antibodies get

In an organism, tall phenotype is dominant over recessive dwarf phenotype, and the alleles are designated as $T$ and $t,$ respectively. Upon crossing two different individuals, total $250$ offsprings were obtained, out of which $124$ displayed tall phenotype and rest were dwarf. Thus, the genotype of the parents were

$3^{\text{'}} AAA TGC GCG ATA 5^{\text{'}}$ is the sequence of nucleotides on a gene; after transcription the $m RNA$ formed against it and the sequence of bases in the corresponding binding anticodons will be

The biomass available for consumption to heterotrophs and the rate of formation of new organic matter by consumers are defined as

The given figure is the diagrammatic representation of the E. coli vector $pBR322.$ Which of these genes can act as selectable marker?

Though the total number of follicles in the ovaries of a normal young woman is about $4,00,000,$ the duration between menarche and menopause is limited. This is attributed to the