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HSC Science (General) १२ वीं कक्षा - Maharashtra State Board Question Bank Solutions for Biology

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Biology
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Describe pericardium.

[8] Respiration and Circulation
Chapter: [8] Respiration and Circulation
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Short answer question.

Describe valves of human heart.

[8] Respiration and Circulation
Chapter: [8] Respiration and Circulation
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Short answer question.

What is the role of papillary muscles and chordae tendinae in the human heart?

[8] Respiration and Circulation
Chapter: [8] Respiration and Circulation
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Give scientific reason.

Human heart is called as myogenic and autorhythmic.

[8] Respiration and Circulation
Chapter: [8] Respiration and Circulation
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Give scientific reason.

Left ventricle is thick than all other chambers of heart.

[8] Respiration and Circulation
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Write in brief about the Biogas production process.

[11] Enhancement of Food Production
Chapter: [11] Enhancement of Food Production
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Aspergillus niger is used to prepare vit ______.

[11] Enhancement of Food Production
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Saccharomyces cerevisiae is used to produce enzyme ______.

[11] Enhancement of Food Production
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What is the main function of a fermenter?

[11] Enhancement of Food Production
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Name two acids produced by using Aspergillus niger?

[11] Enhancement of Food Production
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Match the column A with B and rewrite correct pairs.

  A   B
1. citric acid a) in medicine for solubility of Ca++
2. fumaric acid b) confectionary
3. gluconic acid c) in resins as wetting agents
[11] Enhancement of Food Production
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Explain codominance in colour coat in cattle with checker board method.

[3] Inheritance and Variation
Chapter: [3] Inheritance and Variation
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Which of the following has thickest wall?

[8] Respiration and Circulation
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The phase of contraction of heart is termed as ______.

[8] Respiration and Circulation
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The free edges of cuspid valves are attached to the papillary muscles of the heart by fibres are called ______.

[8] Respiration and Circulation
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In between which layers of pericardium, pericardial fluid is present?

[8] Respiration and Circulation
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Draw diagram of conducting system of human heart. Label SA node and bundle of His.

[8] Respiration and Circulation
Chapter: [8] Respiration and Circulation
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Draw labelled diagram of internal structure of human heart.

Label right atrium, mitral valve, left ventricle and pulmonary semilunar valve.

Write a function of Eustachian and tricuspid valve found in human heart.

[8] Respiration and Circulation
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What is the function of pericardial fluid?

[8] Respiration and Circulation
Chapter: [8] Respiration and Circulation
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What is the importance of valves in the heart?

[8] Respiration and Circulation
Chapter: [8] Respiration and Circulation
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