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Important Questions for HSC Science (General) 12th Board Exam - Maharashtra State Board - Biology

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Biology
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Give the applications of DNA fingerprinting technique.

Appears in 7 question papers
Chapter: [0.04] Molecular Basis of Inheritance
Concept: DNA Fingerprinting Technique

Draw a diagram of the microscopic structure of human sperm. Label the following parts in it and write their functions

(a) Acrosome

(b) Nucleus

(c) Middle piece

Appears in 6 question papers
Chapter: [0.02] Reproduction in Lower and Higher Animals
Concept: Gametogenesis in Animal

Describe the structure of a nucleosome.

Appears in 5 question papers
Chapter: [0.04] Molecular Basis of Inheritance
Concept: Packaging of DNA Helix

Explain the carbon cycle with the help of a simplified model.

Appears in 5 question papers
Chapter: [0.14] Ecosystems and Energy Flow
Concept: Nutrient Cycling

Explain sex determination in human beings.

Appears in 4 question papers
Chapter: [0.03] Inheritance and Variation
Concept: Sex Determination

Construct an age pyramid which reflects an expanding growth status of human population.

Appears in 4 question papers
Chapter: [0.13] Organisms and Populations
Concept: Population

What is ecological succession?

Appears in 4 question papers
Chapter: [0.14] Ecosystems and Energy Flow
Concept: Ecological Succession

Define organic evolution.

Appears in 3 question papers
Chapter: [0.05] Origin and Evolution of Life
Concept: Origin of Life (Theories)

Distinguish between ape and man.

Appears in 3 question papers
Chapter: [0.05] Origin and Evolution of Life
Concept: Human Evolution

Name the causative organism and preventive measures for Typhoid

Appears in 3 question papers
Chapter: [0.1] Human Health and Diseases
Concept: Disease

Give the importance/significance of transgenic animals.

Appears in 3 question papers
Chapter: [0.12] Biotechnology
Concept: Commercial Applications of Biotechnology

Define the following term and give one example for each:

Commensalism

Appears in 3 question papers
Chapter: [0.13] Organisms and Populations
Concept: Population Interactions

Sketch and label the structure of Malpighian body.

Appears in 3 question papers
Chapter: [10.02] Excretion and Osmoregulation
Concept: Regulation of Kidney Function

What is double fertilisation? Describe the process in brief.

Appears in 2 question papers
Chapter: [0.01] Reproduction in Lower and Higher Plants
Concept: Double Fertilization in Plants

With the help of a neat, labelled diagram describe the human male reproductive system.

Appears in 2 question papers
Chapter: [0.02] Reproduction in Lower and Higher Animals
Concept: Human Reproductive System > Male Reproductive System

What is spermatogenesis? Briefly describe the process of spermatogenesis.

Appears in 2 question papers
Chapter: [0.02] Reproduction in Lower and Higher Animals
Concept: Gametogenesis in Animal

Describe the T.S. of human testis

Appears in 2 question papers
Chapter: [0.02] Reproduction in Lower and Higher Animals
Concept: Human Reproductive System > Male Reproductive System

Answer the following questions related to sex determination in human beings:
i. What is sex chromosome?
ii. How many pairs of chromosomes are present in human beings?
iii. How is the sex of the human offspring determined?
iv. Draw a diagram depicting sex determination in man.

Appears in 2 question papers
Chapter: [0.03] Inheritance and Variation
Concept: Sex Determination

Explain the mechanism of sex determination in birds.

Appears in 2 question papers
Chapter: [0.03] Inheritance and Variation
Concept: Sex Determination

_______ enzymes are used as biological scissors in r-DNA technology.

(A) Restriction endonucleases

(B) DNA ligases

(C) DNA polymerases

(D) Reverse transcriptases

Appears in 2 question papers
Chapter: [0.04] Molecular Basis of Inheritance
Concept: DNA Replication
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