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Why are the walls of the left ventricle thicker than the other chambers of the heart?
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Match the antibiotics in column I with their microbial sources in column II:
| Column I | Column II |
| (a) Chloromycetin | (1) Streptomyces griseus |
| (b) Erythromycin | (2) Streptomyces aurifaciens |
| (c) Streptomycin | (3) Streptomyces venezuelae |
| (d) Terramycin | (4) Streptomyces erythreus |
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Match the following products with their microbial sources:
| Products | Microbial Sources | ||
| (a) | Vitamin B2 | (1) | Rhizopus arrhizus |
| (b) | Fumaric acid | (2) | Candida lipolytica |
| (c) | Vitamin B12 | (3) | Trichoderma konigii |
| (d) | Lipase | (4) | Neurospora gossypii |
| (e) | Cellulase | (5) | Pseudomonas denitrificans |
| (f) | Citric Acid | (6) | Aspergillus niger |
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Give advantages of vernalization.
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Draw the neat Labelled diagram of the internal structure of the human heart.
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Match the following pairs:
| Column A | Column B | ||
| Antibiotic produced | Microbial source | ||
| (i) | Penicillin | (a) | Streptomyces venezuelae |
| (ii) | Chloromycetin | (b) | Bacillus licheniformis |
| (iii) | Bacitracin | (c) | Streptomyces aurifaciens |
| (iv) | Erythromycin | (d) | Streptomyces griseus |
| (v) | Streptomycin | (e) | Penicillium chrysogenum |
| (vi) | Terramycin | (f) | Streptomyces erythreus |
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Draw a neat diagram of the conducting system of human heart and label AV node, Bundle of His and Purkinje fibres.
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Give scientific reason.
Human heart is called as myogenic and autorhythmic.
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Write the microbial source of following organic acid.
Citric acid
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Write the microbial source of following organic acid:
Fumaric acid
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Write the microbial source of following organic acid:
Acetic acid
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In human foetus, the heart begins to beat at developmental age of
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Which of the following is sex chromosomal disorder?
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Give the meaning of pacemaker.
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Give reason:
Valves are present in the veins.
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Give reason:
Pulmonary veins carry oxygenated blood.
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Write the microbial source of following organic acid:
Gluconic acid
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Explain the term Fossa ovalis.
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Explain the term Ligamentum arteriosum.
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Explain the term Chordae tendinae.
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