CBSE Class 12 Chemistry - Biomolecules VBQs Based on CBSE and NCERT guidelines. Value based questions are now being given in exams to promote morals and values in students, Students should read and understand the following VBQs to get better understanding and score good marks in exams
1. The teacher fixed five cards on the flannel board that marked A, T, C, U, G,pick up cards that indicate bases that are not common to all nucleic acids.
a) Which cards would Rakesh pick from the five?
b) Of the nucleic acids picked by Rakesh, which does not form hydrogen bonding with other nucleic acids?
c) What are the values involved in this exercise?
Answer a) T and U
c) Scientific attitude.
2. Sudha’s mother received a phone call on Monday morning from a closerelative stating that three of them would be coming over for lunch. Sudha’s mother noticed that she did not have enough curd to serve the guests. Sudhaa class XII student suggested that her mother could warm the milk from the refrigerator or keep it under direct sunlight and curdle it.
a) Why do you think Sudha suggested the above methods?
b) Will it be helpful if her mother followed Sudha’s suggestion?
c) What values are associated with Sudha’s suggestion?
Answer a) Because she learnt in chemistry that proteins get denatured and results coagulation of milk at high temperature.
c) Critical thinking and problem analysis.
3. Nita’s mother fell ill and the doctor diagnosed her with pernicious anemia. She felt lethargic and did not have the energy to do work. Nita helped her mother in household work till she recovered.
a) Name the vitamin whose deficiency caused pernicious anemia.
b) Name the sources which will provides this vitamin.
c) Mention the values shown by Nita.
Answers a) Vitamin A
b) Carrot, green leafy vegetables, milk, etc.
c) Self Awareness.
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