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

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How the resistance in crops can be developed?

[11] Enhancement of Food Production
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Expand the following acronym:

BAC

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Restriction enzymes were discovered by ______.

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The PCR technique is used for ______.

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Write two varieties of sugarcane having high sugar content.

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Which vector is mostly used in rDNA technology in plants?

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Name two restriction enzymes used in PCR.

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Name two better yielding varieties of rice developed in India.

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Give reason – Water acts as thermal buffer

[6] Plant Water Relation
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What is polymerase chain reaction (PCR)?

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Describe three steps involved in mechanism of PCR.

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The DNA polymerase enzyme used in PCR is obtained from______.

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How gene amplification is done?

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Write steps involved in gene amplification.

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______technique is used for in vitro gene cloning or gene multiplication.

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What are the different types of electrophoresis?

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What kind of nervous system is seen in Hydra, earthworm and cockroach?

[9] Control and Co-ordination
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Complete the following chart:

Cranial nerve number Name Type Function
II ______ Sensory ______
V Trigeminal   Touch, taste and jaw movements
X ______ Mixed ______
XII ______ Motor Movement of tongue
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Write a short note on vectors.

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Tissue plasminogen activator and urokinase are used in the treatment of ______.

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