Biotechnology and its Applications — BIOLOGY STD 12 Science — Question

Write the two specific codons that a translational unit of mRNA is flanked by, one on its either sides.

Name two plants other than coca plant that have hallucinogenic properties.

Based on the symptoms of high fever, loss of appetite, abdominal pain and constipation, how will the doctor confirm that the person has typhoid and not amoebiasis?

Given below is a section of a maize grain. Identify ‘A’ and state its function.

The following statements (i), (ii) and (iii) seem to describe the water-pollinated submerged plants. Which one of these statements is incorrect?

1. The flowers do not produce nectar.
2. The pollen grains have mucilaginous covering.
3. The brightly-coloured female flowers have long stalks to reach the surface.

Write any two differences between primary treatment and secondary treatment of sewage water.

What is the definition of biotechnology given by the European Biotechnology Association?### Define biotechnology.

In the pie chart (A) and (B) drawn below to show the global animal diversity, which group of animals would you name and write on the areas shaded back in (A) and (B). In which kind of habitat would you find these groups of animals?

What is divergent evolution? Explain by taking the example of plants.

(a) Write the scientific name of the plant which Natural cannabinoids are obtained.
(b) Write the names of the parts of the plant which are used to obtain drugs.
(c) How does this drug affect the human body?