HSC Science (General) १२ वीं कक्षा - Maharashtra State Board Question Bank Solutions for Biology

The antibiotic chloromycetin is obtained from ______.

Name the secondary metabolites in Catharanthus roseus.

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

Enlist any 'two' floral adaptations in salvia.

Distinguish between X andY chromosomes. (Mention any 'two' points.) 

The microbial source of vinegar is ______.

Explain the types of chromosomes on the basis of position of centromere.

Name any two antibiotics with their microbial source.

The micro-organism used in the production of acetic acid is ______.

Give the microbial source of Vit. B₁₂

_________ is used for desalination of brackish water.

Which of the following is mesodermal is the origin?

Name of the valve between the left atrium and left ventricle and give its significance.

Describe the structure of chromosomes with a suitable diagram.

What is Sinus arrhythmias?

Classify the chromosomes on the basis of position of centromere.

Define pollution. “Industries are pouring poison in water” - Explain

Explain with the help of a suitable diagram conducting system of human heart.

From which microbial sources can pectinase be obtained?

Distinguish between X and Y chromosomes.