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

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Biology
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Multiple choice question.

Which of these is the male reproductive organ in humans?

[0.02] Reproduction in Lower and Higher Animals
Chapter: [0.02] Reproduction in Lower and Higher Animals
Concept: Reproduction in Animal and Human

Multiple choice question.

Presence of beard in boys is a _______.

[0.02] Reproduction in Lower and Higher Animals
Chapter: [0.02] Reproduction in Lower and Higher Animals
Concept: Reproduction in Animal and Human

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Microorganisms also help in production of food like ______________.

[0.11] Enhancement of Food Production
Chapter: [0.11] Enhancement of Food Production
Concept: Improvement in Food Production

Multiple Choice Question:

The molecular knives of DNA are _______.

[0.04] Molecular Basis of Inheritance
Chapter: [0.04] Molecular Basis of Inheritance
Concept: Deoxyribonucleic Acid (DNA) and Its Structure

Multiple Choice Question:

In the RNA molecule, which nitrogen base is found in place of thymine?

[0.04] Molecular Basis of Inheritance
Chapter: [0.04] Molecular Basis of Inheritance
Concept: Deoxyribonucleic Acid (DNA) and Its Structure

How many codons are needed to specify three amino acids?

[0.04] Molecular Basis of Inheritance
Chapter: [0.04] Molecular Basis of Inheritance
Concept: Deoxyribonucleic Acid (DNA) and Its Structure

Multiple Choice Question:

Place the following event of translation in the correct sequence

i. Binding of met-tRNA to the start codon.

ii. Covalent bonding between two amino acids.

iii. Binding of second tRNA.

iv. Joining of small and large ribosome subunits.

[0.04] Molecular Basis of Inheritance
Chapter: [0.04] Molecular Basis of Inheritance
Concept: Deoxyribonucleic Acid (DNA) and Its Structure

Which of the following is the correct recognition sequence of restriction enzyme hind III?

[0.12] Biotechnology
Chapter: [0.12] Biotechnology
Concept: Biotechnology

Multiple choice question

An assemblage of individuals of different species living in the same habitat and having functional interactions is _______________.

[0.13] Organisms and Populations
Chapter: [0.13] Organisms and Populations
Concept: Organisms and the Environment Around

Growth of bacteria in a newly inoculated agar plate shows ____________.

[0.13] Organisms and Populations
Chapter: [0.13] Organisms and Populations
Concept: Organisms and the Environment Around

The second trophic level in a lake is ________________.

[0.14] Ecosystems and Energy Flow
Chapter: [0.14] Ecosystems and Energy Flow
Concept: Ecosystem

Which of the following is most often a limiting factor of the primary productivity in any ecosystem?

[0.14] Ecosystems and Energy Flow
Chapter: [0.14] Ecosystems and Energy Flow
Concept: Ecosystem

Multiple Choice Question:

Water movement between the cells is due to ______.

[0.06] Plant Water Relation
Chapter: [0.06] Plant Water Relation
Concept: Plant Water Relation

Multiple Choice Question:

In guard cells, when sugar is converted into starch, the stomatal pore ______.

[0.06] Plant Water Relation
Chapter: [0.06] Plant Water Relation
Concept: Plant Water Relation

Multiple Choice Question:

Surface tension is due to ____________.

[0.06] Plant Water Relation
Chapter: [0.06] Plant Water Relation
Concept: Plant Water Relation

Multiple Choice Question:

Which of the following type of solution has a lower level of solutes than the solution?

[0.06] Plant Water Relation
Chapter: [0.06] Plant Water Relation
Concept: Plant Water Relation

Multiple Choice Question:

During rainy season wooden doors warp and become difficult to open or to close because of ______

[0.06] Plant Water Relation
Chapter: [0.06] Plant Water Relation
Concept: Plant Water Relation

Multiple Choice Question:

Water absorption takes place through ______.

[0.06] Plant Water Relation
Chapter: [0.06] Plant Water Relation
Concept: Plant Water Relation

Multiple Choice Question:

Due to low atmospheric pressure the rate of transpiration will ____________.

[0.06] Plant Water Relation
Chapter: [0.06] Plant Water Relation
Concept: Plant Water Relation

What is primary productivity?

[0.14] Ecosystems and Energy Flow
Chapter: [0.14] Ecosystems and Energy Flow
Concept: Ecosystem
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