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

Given below is the representation of amino acid composition of the relevant translated portion of b-chain of haemoglobin, related to the shape of human red blood cells.

Who are likely to suffer more from the defect related to the gene represented the males, the females or both males and females equally? And why?

Name the tissue which lines the inner surfaces of fallopian tube.

What is polyembryony and how can it be commercially exploited?

Draw a schematic sketch of pBR322 plasmid and label the following in it:

1. Any two restriction sites.
2. ori and rop genes.
3. An antibiotic resistant gene.

Why should we conserve biodiversity? How can we do it?

OR

Why should we conserve biodiversity? Why is it a moral as well as social duty to contribute towards its protection?

What is the study of fossils called? Mention any three points how the fossils throw light on the past.

What are test tube babies?

Explain the following two components of Darwin's theory of natural selection.

1. Variations.
2. Formation of new species.

Explain the role of tapetum in the formation pollen-grain wall.

In eukaryotes, explain splicing & tailing (figure is not necessary).