List of top Biology Questions asked in UP Board XII

The exaggerated response of the immune system to certain antigens present in the environment is called
What is double fertilization?
PCR stands for
What does ELISA stand for?
If the sequence of one strand of DNA is written as follows: 5' - ATGC ATGC ATGC ATGC ATGC - 3', write down the sequence of the complementary strand in 3' → 5' direction.
Name the flower which shows incomplete dominance.
Write short notes on the following: (i) DNA Palindrome (ii) Carrying capacity
Give a brief account of different population growth models.
Briefly describe the role of hormones in follicular and luteal phase of menstrual cycle in female primates.
Exine layer of pollen grain is made up of
Briefly describe the mechanism of transcription in prokaryotes.
Describe in detail energy flow in an ecosystem.
Which one of the following is not a stop terminator codon?
Write short note on primary and secondary lymphoid organs.
Write short notes on the following: (i) Vaccination (ii) Bio-fertilizer
What are cloning vectors? Write a short note on characteristics of cloning vectors.
Describe the applications of r-DNA technology in medicine.
Differentiate between innate immunity and acquired immunity giving suitable examples.
Describe the law of independent assortment in a dihybrid cross.
Describe the structure of a typical biogas plant with the help of a suitable diagram.
What are transgenic animals? Describe the benefits of transgenic animals in brief.
Draw a well-labelled diagram of an antibody molecule.
Write a note on Intra-Uterine Devices (IUD’s) and their applications.
Describe the process and importance of artificial hybridization in brief.
What is age pyramid? Give a diagrammatic representation of the age pyramid of an expanding human population.