CBSE Class 12 Biology Compartment Question Paper Solved 2018 Set 3

CBSE Class 12 Biology Compartment Question Paper Solved 2018 Set 3. Students can download the last year question papers using the link below. Free download of examination question papers with solutions. Last 10 year question papers should be practised to get better marks in examinations.

1. Write the sex of a human having XXY chromosomes with 22 pairs of autosomes. Name the disorder this human suffers from.

2. Why do DNA fragments move towards the anode during gel electrophoresis ?

3. How do monocytes act as a cellular barrier in humans to provide innate immunity ?

4. Write one advantage and one disadvantage of cleistogamy to flowering plants.

5. Name one amino acid, which is coded by only one codon.

6. Why is the structure of an antibody molecule represented as H₂L₂ ? Name any two types of antibodies produced in a human body.

7. Differentiate between out-crossing and cross breeding.

OR

Why are microbes like Spirulina being produced on a commercial scale ? Mention its two advantages.

8. A hemophilic father can never pass the gene for hemophilia to his son. Explain.

9. Identify the areas labelled i, ii, iii and iv in the pie chart given below representing the biodiversity of plants showing their proportionate number of species of major taxa.

Please click the link below to download pdf file of CBSE Class 12 Biology Compartment Question Paper Solved 2018 Set 3.