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BiologyCraze is HelpFul for CBSE Biology Students, CHSE Biology Students, NEET Aspirants and OUAT Aspirants.

  • You can get Previous year question of various exam
  • You can get Biology notes.
  • NCERT Exercise Solutions.

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CHSE Board Odisha Biology Health and Disease Chapter Previous 10 Year Questions

Health and disease chapter is the most important chapter for the CHSE Odisha Biology board exam. It is the most important chapter for one-mark questions, short notes or, short answer type questions and differentiates.

First, see the new syllabus and then practice these questions. Because 2010 to 2017 board exams were held as per the old CHSE syllabus.

One mark questions:-
  1. Name the parasite blocking the lymphatics in human and name the disease caused by this parasite. (CHSE – 2010)
  2. Name the cell in the human body destroyed by HIV. (CHSE – 2010)
  3. Which tissue affected in sarcoma? (CHSE – 2010)
  4. Which test is required to diagnose typhoid? (CHSE – 2011)
  5. Which secretion is inhibited by alcohol? (CHSE – 2011)
    1. ADH
    2. Insulin
    3. Oxytocin
    4. Progesterone
  6. Deficiency of which hormone causes diabetes? (CHSE – 2011)
  7. Which test is conducted to identify HIV? (CHSE –            (2012)
  8. ______ test is specifically employed to determine the presence of disease causing Salmonella typhi. (CHSE – 2013)
  9. Which is the infective stage of Plasmodium falciparum? (CHSE – 2014)
  10. Through which vector is Wuchereria bancrofti transmitted? (CHSE - 2015)

Biofortification

  • Majority of the world’s population is suffering from the deficiency of proteins, vitamins and essential minerals.
  • Goiter due to iodine deficiency, blindness due to vitamin A deficiency and anemia due to iron and folate deficiency remain major health problems in India.
  • Through several food supplements are available to compensate the nutritional deficiencies, but new approaches are needed, especially to reach the poor.
  • There is a need for multiple complementary strategies to address micronutrients deficiencies.

What is biofortification?

  • Biofortification is the method for developing crops with higher level of vitamins, minerals, proteins and healthier fats to improve public health.
  • It is the idea of breeding crops to increase their nutritional value.
  • This can be done either through conventional breeding or through genetic engineering.
  • The objectives of biofortification is to improve
    • Protein content and quality
    • Oil content and quality
    • Vitamin content
    • Micronutrients content
    • Mineral content
  • Examples of biofortified crops: -
    • Maize with high beta carotene traits has been shown to be an efficacious as supplements of this orange coloured maize were released in Zambia in 2012.
    • Rice biofortified with zinc was released to farmers in Bangladesh in 2013.
    • The biofortified rice varieties have zinc content, i.e.- 30 % higher than local varieties.

CHSE Biology Molecular Basis of Inheritance previous 10-year questions

Chapter- Molecular Basis of Inheritance 

One mark questions:-
  1. _____ is the initiation codon. (CHSE – 2012)
  2. RNA does not have _____ as nitrogenous base. (CHSE – 2013)
  3. The initiation codon AUG normally codes for formylated _______. (CHSE – 2014)
  4. To form a continuous DNA molecule, the enzyme ______ joints Okazaki fragments. (CHSE – 2015)
    • Primase
    • Polymerase
    • Helicase
    • Ligase
  5. _______ coined the term ‘gene’ for Mendelian factor. (CHSE – 2017)
  6. The complementary base of adenine in RNA molecule is _____. (CHSE – 2018)
  7. The example of start codon is _____. (CHSE – 2019)
    • UAA
    • UGA
    • UAG
    • AUG
  8. Mutation that completely eliminates a gene is called _____ mutation. (CHSE – 2019)

CHSE Biology Heredity and Variation (Genetics) previous 10-year questions

Chapter- Heredity and Variation (Genetics)

One mark questions:-

  1. Monohybrid cross yields ______ numbers of genotype. (CHSE – 2014)
  2. The term ‘gene’ was coined by _____ in the year 1909. (CHSE – 2015)
  3. In a cross between red and white flowered plants, F1 hybrids are pink. This is called ______ dominance. (CHSE – 2016)
  4. _______ coined the term ‘gene’ for Mendelian factor. (CHSE – 2017)
  5. If allele for tallness (TT) is dominant and dwarfness (tt) is recessive, then in a cross between ________, 50% of the offspring will be dwarf. (CHSE – 2018)
    • TT x tt
    • Tt x tt
    • tt x tt
    • Tt x Tt
  6. The phenomenon of single gene contributing to multiple phenotypic traits is called _______. (CHSE – 2019)
    • pleiotropy
    • codominance
    • incomplete dominance
    • polygenic inheritance
  7. Mutation that completely eliminates a gene is called ________ mutation. (CHSE – 2019)

CHSE Biology Sexual Reproduction in Flowering Plants 10 Year Questions

Chapter- Sexual Reproduction in Flowering Plants

One mark questions:-

  1. In a dichogamous flower, when anther matures earlier than the ovule, the process is called _____. (CHSE – 2012)
  2. _____ is the nutritive tissue of microspores in angiosperms. (CHSE – 2012)
  3. The motile asexual reproductive unit is called _____. (CHSE – 2012)
    • zoospore
    • aplanospore
    • zygospore
    • microspore
  4. The process of physical removal of anther is called ____. (CHSE – 2016)
  5. The motile asexual reproductive unit is called _____. (CHSE – 2012)
    • porogamy
    • chalazogamy
    • mesogamy
    • herkogamy
  6. The outer sterile tissue that provides to the developing microspores in microsporogenesis is called _____. (CHSE – 2018)
  7. Nutritive tissue of a fertilized egg in angiosperm is _____. (CHSE – 2019)