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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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Distinguish between photosynthesis and aerobic respiration.

[8] Respiration and Circulation
Chapter: [8] Respiration and Circulation
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As the base sequence present on one strand of DNA decides the base sequence of other strands; this strand is considered as ______.

[4] Molecular Basis of Inheritance
Chapter: [4] Molecular Basis of Inheritance
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Dead and dried cell mass of microbes having nutritive value is also known as -----------

[11] Enhancement of Food Production
Chapter: [11] Enhancement of Food Production
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What is ‘jumping genes’?

[11] Enhancement of Food Production
Chapter: [11] Enhancement of Food Production
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cDNA means ______.

[12] Biotechnology
Chapter: [12] Biotechnology
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The nervous system of mammals uses both electrical and chemical means to send signals via neurons. Which part of the neuron receives impulse?

[9] Control and Co-ordination
Chapter: [9] Control and Co-ordination
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___________ is a neurotransmitter.

[9] Control and Co-ordination
Chapter: [9] Control and Co-ordination
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The supporting cells that produce myelin sheath in the PNS are _________.

[9] Control and Co-ordination
Chapter: [9] Control and Co-ordination
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Receptors for protein hormones are located ________.

[9] Control and Co-ordination
Chapter: [9] Control and Co-ordination
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Match the organism with the type of nervous system found in them.

1. Neurons a. Earthworm
2. Ladder-type b. Hydra
3. Ganglion c. Flatworm
4. Nerve net d. Human
[9] Control and Co-ordination
Chapter: [9] Control and Co-ordination
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Short answer question

List the properties of the nerve fibres.

[9] Control and Co-ordination
Chapter: [9] Control and Co-ordination
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Answer the following.

Complete the table.

Location Cell Type Function
PNS ___________ Produce myelin sheath
PNS Satellite cells _____________
___________ Oligodendrocytes Form myelin sheath around central axon
CNS ___________ Phagocytose pathogens
CNS ___________ Form the epithelial lining of brain cavities and central canal.
[9] Control and Co-ordination
Chapter: [9] Control and Co-ordination
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Long answer question

Draw the neat labelled diagram of Multipolar Neuron.

[9] Control and Co-ordination
Chapter: [9] Control and Co-ordination
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What is the function of an RNA primer during protein synthesis?

[4] Molecular Basis of Inheritance
Chapter: [4] Molecular Basis of Inheritance
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Which enzyme does remove supercoils from replicating DNA?

[4] Molecular Basis of Inheritance
Chapter: [4] Molecular Basis of Inheritance
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Very Short Answer Question:

Why are Okazaki fragments formed on lagging strand only?

[4] Molecular Basis of Inheritance
Chapter: [4] Molecular Basis of Inheritance
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Very Short Answer Question:

When does DNA replication takes place?

[4] Molecular Basis of Inheritance
Chapter: [4] Molecular Basis of Inheritance
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Recombinant protein .................. is used to dissolve blood clots present in the body.

[12] Biotechnology
Chapter: [12] Biotechnology
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Give the role of Ca++ ions in the transfer of the recombinant vector into the bacterial host cells.

[12] Biotechnology
Chapter: [12] Biotechnology
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Long Answer Question:

Explain the process of DNA replication.

[4] Molecular Basis of Inheritance
Chapter: [4] Molecular Basis of Inheritance
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