HSC Science (General) १२ वीं कक्षा - Maharashtra State Board Important Questions for Biology

Describe the methodology of tissue culture.

In____________ , superior males of one breed are mated with superior females of another breed.

1. out crossing
2. cross breeding
3. out breeding
4. inbreeding

Give 'two' varieties of silk which are considered  as inferior quality

Trichoderma konigi is a source of _______ enzyme.

(A) invertase

(B) lipase

(C) pectinase

(D) cellulase

Edible fruiting bodies are produced by _______.

Give reason :
Emasculation is done in a flower which is selected as female parent.

Explain the role of microbes in sewage treatment.

Which steps would you follow to develop a new variety of crop plant by selective breeding?

Mention any ‘two’ methods used to prevent spoilage of fish

In Brassica (rapeseed, mustard)........................ varietys is resistant to Aphids.

(a) Pusa A-4
(b) Pusa Gaurav
(c) Pusa Sawni
(d) . Pusa Shubra

The antibiotic chloromycetin is obtained from ______.

R. Q. for proteins is about .......................

(a) 0.7

(b) 0.8

(c) 0.9

(d) 1.0

Give an example of the non-edible or poisonous mushroom, studied by you.

Name the secondary metabolites in Catharanthus roseus.

Name the organism and enzyme which brings about the alcoholic fermentation of sucrose.

What are 'biofertilizers'? Explain them with suitable examples.

Vijaya, Padma, Kanti and Jayanti are high-yielding varieties of ______.

The microbial source of vinegar is ______.

Give the meaning of the Nif gene.

Name the aquatic fern commonly used in paddy fields as a biofertilizer.