List of top Questions asked in PSEB XII

Distinguish between innate and acquired immunity.
What happens to the corpus luteum in human females if the ovum is (a) fertilised (b) not fertilised?
Define infertility. Explain any one assisted reproductive technology to check the problem of infertility.
What is Amniocentesis? For what purpose, it is used?
A woman carrier for haemophilia marries a normal man. Predict the possible genotypes and phenotypes of the offspring using a Punnett square. Also state percentages.
Sex determination in honey bees is XX-XY type.
A child may have O blood group if his father and mother have A and AB blood group respectively.
Floral parts are un-wettable in case of hydrophilous flowers.
The lymphoid organs are the part of which system of human body?
What are primary lymphoid organs?
Name one primary lymphoid organ and one secondary lymphoid organ found in the human body.
Menstrual cycle ceases during pregnancy.
Organic farming does not include chemical fertilizers.
Coconut water is an example of a ________ endosperm.
ELISA stands for ________.
Cyclosporin A, which is used as an immunosuppressive agent in organ-transplant patients, is produced by the fungus named ________.
During spermiogenesis, nebenkern of the sperm develops from ________ of the spermatid.
The sterilisation procedure in males is called ________.
Heart shaped embryo is the feature of:
The number of megaspores formed from one megaspore mother cell is:
Which of the following organic acids can be produced on commercial scale by Aspergillus niger?
The initiator codon, AUG codes for which of the following amino acids?
Which of the following is correct according to Chargaff's rules?
The cavity present in the blastula is called:
An ideal contraceptive should be: