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

Draw labelled diagram of internal structure of human heart.

Label right atrium, mitral valve, left ventricle and pulmonary semilunar valve.

Write a function of Eustachian and tricuspid valve found in human heart.

Draw labelled diagrams of the following: Eye

Describe the T. S. of thyroid gland

Short answer question

List the properties of the nerve fibres.

‘Injury to the medulla oblongata causes sudden death’ Explain.

Sketch and label T. S. of Spinal cord.

Name three Mixed cranial nerves along with their numbers.

Distinguish between

Cerebrum and Cerebellum.

Answer the questions after observing the diagram given below.

1. What acts as the first messenger?
2. Why can’t hormones like catecholamines enter their target cells through plasma membrane?
3. Name the mode of hormone action shown in the diagram.

Describe any four hormones secreted by Adenohypophysis. 

Give any two functions of cerebellum.

What is vaccine?

Enlist the four types of T- lymphocytes, responsible for immune response of our body.

Enlist any two features of Acquired immunity.

Sketch and label – Structure of Antibody

Enlist the advantages of Biogas.

Which are the bacteria responsible for converting organic acids into methane?

Give economic importance of apiculture

Explain the process of sewage water treatment before it can be discharged into natural water bodies.

What is a heterocyst?