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

A cross was carried out between two pea plants showing the contrasting traits of heightof the plant. The result of the cross showed 50% of parental characters.

1. Work out the cross with the help of a Punnett square.
2. Name the type of the cross carried out.

A vector is engineered with three features which facilitate its cloning within the host cell. List the three features and explain each one of them.

What are mutagens? Give an example.

Name a free-living and a symbiotic bacterium that serve as bio-fertiliser. Why are they so called?

Give the advantages of biogas.

Write a note on deforestation and enumerate it's consequences.

Give examples of diseases which are caused due to single gene defects.

Differentiate between codon and an anticodon.

How is an ovule technically referred to?

Select and rewrite the appropriate disorder of the respiratory system with the given symptom.
(Sinusitis, Emphysema, Silicosis and asbestosis, Laryngitis)
(1)Breakdown of alveoli, shortness of breath.
(2)Inflammation of the sinuses, mucous discharge.
(3)Inflammation of larynx, vocal cord, sore throat, hoarseness of voice, mucous build up and cough.
(4)Inflammation of fibrosis, lung damage.