List of top Biology Questions asked in CBSE Compartment Exam Class XII

If a colour-blind woman marries a person whose mother is colour-blind, then what is the probability of colour blindness in their offspring?
Which one is not determined in the developing foetus by using amniocentesis?
Who proposed the competitive exclusion principle?
How many billion tons productivity of oceans?
Assertion (A): Apple is false fruit.
Reason (R): Thalamus also contributes to fruit formation in apple.
How many number of biodiversity hotspots in the world right now?
Which chemical is obtained from microorganism Aspergillus niger}?
If a person is positive in Widal test, then that person is infected by which pathogen?
The first r-DNA was constructed in which microorganism?
Genes which control $\alpha$-Thalassemia and $\beta$-Thalassemia are present on which number of chromosomes?
Distance between two consecutive base pairs of DNA is \rule{2cm}{0.1mm}
In a family tree of dinosaurs, which dinosaur was about 20 feet in height \& had huge fearsome dagger-like teeth?
They are useful to get rid of aphids.
Which scientist proposed that “embryo never pass through the adult stages of other animals”?
What is the correct name of AI technique in assisted reproductive technologies?
The flows of genetic information in central dogma are in which direction?
Which scientist proposed that "embryo never pass through the adult stages of other animals"?
Which one of the following transgenic animals is being used to test the safety of the polio vaccine?
Restriction Endonuclease – Hind II always cuts DNA molecules at a particular point by recognising a specific sequence of:
The type of bond represented by the dotted line ‘------’ in a schematic polynucleotide chain is:
In which of the following conditions/diseases is there a substantial increase in the activity of mast cells observed in the human body?
Lactobacillus} that sets milk into curd is categorised as:
Which one of the following hormones is secreted by the human placenta that helps in the maintenance of pregnancy?
Select the incorrect} match from the following:
You know that there are twenty different types of naturally occurring amino acids and four different types of bases in the DNA. A combination of 3 such bases code for a specific amino acid. If instead there are 96 different amino acids and 12 different bases in the DNA, then the minimum number of combination of bases required to form a codon is: