List of top Questions asked in Bihar Board Class XII

Which of the following inhibits synthesis of cholesterol?
Capacity to generate a whole plant from a plant cell is called as
From which of the following bacteria, thermostable DNA polymerase is isolated?
Which of the following bacteria synthesizes insecticidal protein?
Which of the following statements is incorrect about DNA replication?
Which of the following enzymes is responsible for transcription of ribosomal RNA?
Some amino acids are coded by more than one codon. Such code is known as
What is the role of y gene in lac operon?
Paleontological evidence is based on the study of
Which of the following plants produces poisonous cardiac glycoside?
Which of the following are decomposers?
Which of the following is not a cloning vector for bacteria?
Which of the following methods is used to inject recombinant DNA into nucleus of animal cell directly?
For isolation of DNA a fungus is treated with which enzyme?
Which of the following is absent in pBR322?
If a foreign DNA is inserted in tetracycline resistant gene, the recombinant plasmid
Which of the following is not the reason for global warming?
Which of the following statements is incorrect about organic farming?
Which of the following statements is incorrect about temperature?
At which level is natural selection operated to evolve the desired traits?
When percentage of individuals of pre-reproductive, reproductive and post-reproductive phase is in decreasing order in the age pyramid of human population, it shows that population is
Which of the following reproduces once in a lifetime?
What was the reason for co-existence of five closely related species of warblers?
Name of Ramdeo Mishra is associated with which field of research?
HIV attacks on which of the following cells?