Check out important 2 marks questions for CBSE Class 12 Biology Term 2 exam preparation. These chapter-wise questions have been prepared by experts so are very important for last minute revision before tomorrow’s CBSE Term 2 Exam 2022.
CBSE Class 12 Biology Exam 2022 (Term 2): CBSE Class 12 Biology Term 2 exam which will be held tomorrow, May 30, 2022, 2 marks questions for all chapters of Biology are given below. These chapter-wise questions are very important for last minute revision before the exam. Practicing these questions by experts will definitely help you increase your score in CBSE Board Exams.
Check CBSE Class 12 Biology Important 2 Marks Questions (Chapter-Wise)
Chapter 8 – Human Health and Disease
Q. Write the events that take place when the vaccine for a disease enters the human body.
Q. Why is tetanus antitoxin given to a person with a cut and scratch after an accident? Give reason.
Q. Write the source and effect of the following medicines on human body.
Q. Differentiate between innate immunity and acquired immunity.
Q:How are morphine and heroin related? Mention the effect each of them has on the human body?
Chapter 10 – Microorganisms in Human Welfare
Q. Name the microbes used for the industrial production of the following.
a.citric acid b. acetic acid C. butyric acid D. ethanol
Q. Organ transplant patients require a medicine called cyclosporine. How is it useful to the patient? Name the source of this medicine.
Qa) Bottled fruit juices brought from the market are cleaner than the juices made at home. Why?
b) Lipase is used in detergent formulations. Why?
Q. What are floxes in STP? Mention the role of flux in STP.
Q. How is primary treatment different from secondary treatment in a sewage treatment plant?
Chapter 11 – Biotechnology – Principles and Processes
Q. Identify the recognition sites in the given sequences at which E.coRI will cut and form sticky ends.
Q. What is the role of ‘ori’ in any plasmid?
Q. Study the given diagram and answer the questions
(a) Name the restriction enzyme which recognizes this palindrome.
(b) Name the enzyme which cleaves DNA fragments.
Q. Make a list of tools of recombinant DNA technology
Q. Why is it not possible for an alien DNA to become part of a chromosome and replicate anywhere along its length?
Chapter 12 – Biotechnology and its Applications
Q. What are transgenic animals? How was the first transgenic cow found to be more useful for humans than the normal cow?
Q. How parasitic infection can be prevented by silencing specific mRNA in RNA interference?
Q. What causes adenosine deaminase deficiency in a person?
Q.GMOs have been useful for mankind. List five useful GMOs created so far and how they have been useful.
Q. Suggest any two possible treatments to be given to a patient with adenosine deaminase deficiency.
Chapter 13 – Organisms and Populations
Q. Draw labeled diagrams of fixed and decreasing age pyramids of human population.
Q. Shark is euthermal while polar bear is stenothermal. What is the advantage of the former and what is the hindrance of the latter?
Q. How are mammals living in cold regions and seals living in polar regions able to reduce their body heat loss?
Q. How do kangaroo rats and desert plants adapt themselves to survive in their extreme habitat? Explain
Chapter 15 – Biodiversity and its Conservation
Q. In the pie chart given below, identify the regions labeled i, ii, iii and iv that represent plant biodiversity, showing proportional number of species of major taxa.
Q. Suggest two practices giving one example each, which help in protecting rare or threatened species.
Q. Suggest four advanced ex-situ methods for conservation of threatened biodiversity.
Q. How to avoid the following stressful situations:
d) zooplankton in the lake
Q.(a) “India has more ecosystem diversity than Norway.” Do you agree with this statement? Give reasons in support of your answer.
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