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HSC Science (General) 12th Standard Board Exam - Maharashtra State Board Question Bank Solutions for Biology

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Biology
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Describe any four measures to achieve Mission Harit Maharashtra.

[15] Biodiversity, Conservation and Environmental Issues
Chapter: [15] Biodiversity, Conservation and Environmental Issues
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______ hormone is responsible for the efflux of K+ ions from guard cells and acts as an antitranspirant.

[7] Plant Growth and Mineral Nutrition
Chapter: [7] Plant Growth and Mineral Nutrition
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Abscisic acid is the common name given to two identical substances isolated separately. Name them.

[7] Plant Growth and Mineral Nutrition
Chapter: [7] Plant Growth and Mineral Nutrition
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Give the chemical features of abscisic acid.

[7] Plant Growth and Mineral Nutrition
Chapter: [7] Plant Growth and Mineral Nutrition
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Give a reason – ABA is also known as an antitranspirant.

[7] Plant Growth and Mineral Nutrition
Chapter: [7] Plant Growth and Mineral Nutrition
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Why recycling of e-wastes is considered dangerous?

[15] Biodiversity, Conservation and Environmental Issues
Chapter: [15] Biodiversity, Conservation and Environmental Issues
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Given below function performed by plant hormone. Which hormone is responsible for the given action?

Shedding of leaves

[7] Plant Growth and Mineral Nutrition
Chapter: [7] Plant Growth and Mineral Nutrition
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Name the stress hormone in plants.

[7] Plant Growth and Mineral Nutrition
Chapter: [7] Plant Growth and Mineral Nutrition
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Describe abscissic acid physiological effects.

[7] Plant Growth and Mineral Nutrition
Chapter: [7] Plant Growth and Mineral Nutrition
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Write a note Alzheimer's disease.

[9] Control and Co-ordination
Chapter: [9] Control and Co-ordination
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Identify the growth hormone in plants which causes inhibitory effect.

[7] Plant Growth and Mineral Nutrition
Chapter: [7] Plant Growth and Mineral Nutrition
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Explain the steps involved in preliminary treatment of sewage.

[11] Enhancement of Food Production
Chapter: [11] Enhancement of Food Production
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Which of the following is not a photosynthetic pigment?

[7] Plant Growth and Mineral Nutrition
Chapter: [7] Plant Growth and Mineral Nutrition
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Which one of the following is a stop codon?

(a) UAG

(b) UAC

(c) AUG

(d) UCA

[4] Molecular Basis of Inheritance
Chapter: [4] Molecular Basis of Inheritance
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Enlist the advantages of biogas.

[11] Enhancement of Food Production
Chapter: [11] Enhancement of Food Production
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Which are the bacteria responsible for converting organic acids into methane?

[11] Enhancement of Food Production
Chapter: [11] Enhancement of Food Production
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A person suffering from diabetes insipidus shows __________.

[9] Control and Co-ordination
Chapter: [9] Control and Co-ordination
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Give the graphical representation of Hardy· Weinberg's principle in the form of Punnet Square.

[5] Origin and Evolution of Life
Chapter: [5] Origin and Evolution of Life
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Membrane bound receptors and hormones produce second messengers like _________.

[9] Control and Co-ordination
Chapter: [9] Control and Co-ordination
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Explain in brief the biogas production process with the help of a labelled figure.

[11] Enhancement of Food Production
Chapter: [11] Enhancement of Food Production
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