Principles of Inheritance and Variation — BIOLOGY STD 12 Science — Question

Describe in detail the steps involved in the replication of DNA.

What factors are responsible for losses during storage and transport of crops? Explain, with example, how genetic engineering can reduce these losses?

1. Give reasons for:

1. Both strands of DNA are not copied during transcription.
2. Transcription and translation in bacteria can be coupled.

2. Differentiate between the process of transcription in prokaryotes and eukaryotes.

Anukool is a big businessman in Delhi, but belongs to a small village. He went to his village during Christmas holiday. He was very disturbed to see women still using cowdung's cakes to prepare food there. He decided to set up a biogas plant so that people can use gas obtained from it for cooking. The villagers were very thankful to Anukool for his valuable help.

1. What is biogas?
2. What are the uses of biogas?
3. Name some microorganisms involved in biogas production.
4. What are the values shown by Anukool?

Coronary artery disease (CAD).

How Indian culture and traditions helped in bio-diversity conservation? Give importance of conservation in terms of utilitarian reasons.

What is capacitation? Give its importance.

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

Your school has been selected by the Department of Education to organise and host an interschool seminar on "Reproductive Health - Problems and Practices". However, many parents are reluctant to permit their wards to attend it. Their argument is that the topic is "too embarrassing."
Put forth four arguments with appropriate reasons and explanation to justify the topic to be very essential and timely.

Your school’s athletic team along with the athletic teams from different schools reach the venue two days before the inter district school athletic event was to be held. A day before the competition, a team of officials from an agency arrive and ask for blood and urine samples from all the participating athletes.

1. Would you support or object to this sample collection? Provide explanation to your answer.
2. Write a note that you would like to read out to your team-mates to explain the purpose of this visit of these officials.