List of top Biology Questions asked in Maharashtra Board Class XII Exam

Define the following terms: 
(a) Gene Flow 
(b) Chromosomal Aberrations

Enlist the uses of gene therapy.
Distinguish between human sperm and ovum.

Observe the graph and select the correct option: 

Arrange the following steps of DNA fingerprinting in correct sequence: 
(a) Gel electrophoresis (b) Isolation of DNA (c) Southern blotting (d) Restriction digestion

What are the reasons for the success of Mendel?
Explain the term Emigration.
How many meiotic divisions are required for the formation of 300 seeds in angiosperm?
Which cells of islets of Langerhans produce the hormone insulin?
Give the name of the microbial source of the antibiotic chloromycetin.
What is the full form of IAA?
Expand the term ZIFT.
What are vestigial organs?
Identify the appropriate term for the number of births under ideal conditions:
Which one of the following does not evolve further?
Which of the following types require pollinator but result is genetically similar to autogamy?

Recognition sequences of restriction enzymes are generally ___________ nucleotides long. 
 

Which of the following is caused by an unsterilized needle?
Which of the following divides the nasal cavity?

In absence of fertilization, corpus luteum degenerates into __________. 
 

Which one of the following is not a part of lac operon?
Identify the growth hormone in plants which causes inhibitory effect.