Biotechnology: Principles and Processes — BIOLOGY STD 12 Science — Question

What is tissue culture? What are the different types of tissue culture? Describe briefly.###Write an essay on tissue culture.

An individual and a population has certain characteristics. Name these attributes with definitions.

The zygote passes through several developmental stages till implantation, Describe each stage briefly with suitable diagrams.

With the help of a diagram explain the structure of DNA.

The genetic code is, for the most part, universal, with few exceptions. Explain it by giving the example of mitochondria, the power house of cell.

Recombinant DNA (rDNA) is a technology that uses enzymes to cut and paste together DNA sequences of interest. The recombined DNA sequences can be placed into vehicles called vectors that ferry the DNA into a suitable host cell where it can be copied or expressed.
i. A bacterial cell is shown in the figure given below. Label the part 'A' and 'B'. Also, mention the use of part A in rDNA technology.

ii. Suppose a linear DNA fragment and a plasmid has three restriction sites for EcoRI. How many fragments will be produced from linear DNA and plasmid, respectively?

Explain the chromosomal theory of inheritance.

Any recombinant DNA with desired gene is required in billion copies for commercial use. How is this amplification done? Explain.

Answer the following questions:
Describe the temperature treatment that enhances the bacteria to take up the rDNA.

Starting with the zygote, draw the diagrams of the different stages of embryo development in a dicot.