On this page we have uploaded UBSE Intermediate Class 12 Question Paper for Biology released by ubse.uk.gov.in. The question paper provided here from Uttarakhand State Board. Download the 2023 question paper pdf as well.
Uttarakhand State Board has published subject wise question paper for this year Class 12 students in its official portal ubse.uk.gov.in. Here we have published Class 12 UBSE question paper 2023 for Biology subject. For more information regarding Uttarakhand Intermediate Class 12, 2023 Exam Date, Exam Pattern, Time, Date, How to prepare follow our website.
Uttarakhand Board (UBSE) Intermediate Class 12 Question Papers – Biology Subject
(1) Double fertilization occurs in-
(i) Algae
(ii) Bryophytes
(iii) Gymnosperms
(iv) Angiosperms
(2) The number of chromosomes in the individual suffering from Turner’s syndrome is-
(i) 48
(ii) 46
(iii) 47
(iv) 45
(3) According to Binomial system, what is the biological name of modern human-
(i) Homo-sapiens
(ii) Panthera tigris
(iii) Homo-erectus
(iv) Homo-habilis
(4) Antibiotics are produced by-
(i) Vitamins
(ii) Protozoans
(iii) Microbes
(iv) Chemicals
(5) Which is/are transgenic animal in the following-
(i) Rabbit
(ii) Cow
(iii) Sheep
(iv) All of the above
(6) Golden rice is enriched in-
(i) Vitamin ‘A’
(ii) α – Carotene
(iii) Anthocyanine
(iv) Keratine
(7) The trophic level of human in an ecosystem is-
(i) First trophic level
(ii) Second trophic level
(iii) Third trophic level
(iv) Fourth trophic level
(8) In desert plants, leaves modified into
(i) Stem
(ii) Spines
(iii) Fruits
(iv) Roots
(2) What is the name of inner most layer of microsporangium?
(3) Sickle cell anaemia is the example of which type of mutation?
(4) Where Darwin’s Finches are found?
(5) By which bacterium Bt-toxin is produced.
(6) By which bacterium Bt-toxin is produced.
(7) What is the full form of C.F.C. gas?
(8) Write the name of any two hormones produced by placenta in embryo development.
(9) Clarify the difference between Transcription and Translation.
(10) A pure tall with red flower pea plant is crossed with a pure dwarf with white flower pea plant. What type of plants will be produced in F, and F, generation, explain with diagrammatic sketch?
Or
What is sex determination? Mention the sex determination in human beings, also draw liner diagram.
(11) Mention two measures each, for prevention and control of alcohol and drugs abuse among adolescents?
(12) Write the short notes on the following-
(i) Green revolution
(ii) Bt-cotton
(13) What is gene therapy? Explain with example of Adinosine deaminase deficiency?
(14) Explain food web in grassland ecosystem.
Or
Write major causes of air pollution.
(15) What is Biodiversity? Give the name of any two methods of Biodiversity Conservation.
(16) Write the effects of global warming on Glaciers.
(17) (i) plastic waste
(ii) Forestation
(iii) Bio – magnification
(18) Write any three applications of biotechnology in the area of Agriculture.
Or
What are transgenic animals? Give importance and example of transgenic animals.
(19) How many types of ecological pyramids in an ecosystem? Illustrate them diagrammatically too.
Or
Discuss the role of women and communities in protection and conservation of forests.
(20) Draw a neat and labelled diagram of transverse section of ovary of woman.
Or
(21) (i) What is menstrual cycle? Clarify.
(ii) Draw a labelled diagram of human sperm.
(22) What does sex-linked character mean? If a haemophilic carrier woman marries with a normal male, how this disease will develop in their future progeny? Explain diagrammatically.
(23) Mention Hardy-Weinberg Principle.
(24) How does the transmission of following diseases take place?
(i) AIDS
(ii) Malaria
(iii) pneumonia
(25) What is sewage? Describe the Primany and secondary sewage treatment.
(26) Vfhat is pollination? What are the kinds of pollination? Describe the different agents of pollination process.
Or
Draw only labelled diagram of the following-
(i) Longitudinal Section (L.S.) of Pistil showing path of Pollen tube growth
(ii) Diagrammatic representation of the mature embryosac
(27) Describe the structure of R.N.A. and give the irnportance of R.N.A.
Or
(i) Write the salient features of Genetic Code.
(ii) Elaborate the natural selection theory of Darwinism.
(28) What is malaria-parasite. Describe its different stages of life cycle in human.
Or
Write short notes on the following-
(i) Cancer
(ii) Metastasis
(iii) Morphine