Model Paper 2 — BIOLOGY STD 12 Science — Question

Differentiate between benign tumor and malignant tumor.

The sacred groves of Aravalli Hills and Ooty botanical garden, both aim at biodiversity conservation. How do they differ in their approaches? Explain.

Write a short note on viability of seeds.###How long do the seeds remain alive after they are dispersed?

List the disadvantages of insulin obtained from the pancreas of slaughtered cows and pigs:

What do you understand by connecting Link? Explain their importance in biological evolution by giving suitable examples.

Prior a sports event blood and urine samples of sportspersons are collected for drug tests.

1. Why is there a need to conduct such tests?
2. Name the drugs the authorities usually look for.
3. Write the generic names of two plants from which these drugs are obtained.

Explain the changes that milk undergoes when suitable starter/ inoculum is added to it. How does the end product formed prove to be beneficial for human health?

How was it concluded that genes are located on chromosomes?

Why are the males of Grasshoper and Drosophila said to show heterogamete? Explain female heterogamete with the help of an example.

Shubham was taught in the biotechnology class about the production of recombinant protein with the help of bioreactor. He was surprised by this new information. In the evening he discussed it with his elder brother, who is a biotechnologist. He smiled and explained him in detail.

1. What is recombinant protein?
2. Why is bioreactors useful in industries?
3. What are the values shown by Shubham?