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Question Paper - Biology 2015 - 2016-H.S.C-12th Board Exam Maharashtra State Board (MSBSHSE)

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SubjectBiology
Year2015 - 2016 (October)

 Topics
 Marks
 Topics
 Marks

Marks: 80
Q: 1 | Select and write the most appropriate answer from the given alternatives for each sub-question:[7]
Q: 1.1[1]

How many meiotic divisions will be needed to produce 44 female gametophytes in angiosperms?

(A) 11

(B) 22

(C) 44

(D) 66

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Q: 1.2[1]

If the codon on m-RNA is AUG, the compatible anticodon on t-RNA is _______.

(A) UAG

(B) UAC

(C) GUA

(D) AUC

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Q: 1.3[1]

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

(A) Restriction endonucleases

(B) DNA ligases

(C) DNA polymerases

(D) Reverse transcriptases

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Q: 1.4[1]

Vegetative propagation takes place with the help of leaves in _______ plant.

(A) Kalanchoe

(B) Oxalis

(C) Cynodon

(D) Dahlia

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Q: 1.5[1]

Trichoderma konigi is a source of _______ enzyme.

(A) invertase

(B) lipase

(C) pectinase

(D) cellulase

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Q: 1.6[1]
Q: 1.7[1]

Edible fruiting bodies are produced by _______.

(A) Yeast

(B) Rhizopus

(C) Nostoc

(D) Agaricus

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Q: 2[12]
Q: 2.1 | Answer each question in ‘One’ sentence only:[6]
Q: 2.1.1[2]

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

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Q: 2.1.2[2]

Label the parts (1) and (2) in budding of yeast cell.

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Q: 2.1.3[2]

Enlist types of DNA library.

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Q: 2.1.4[2]

Define parthenocarpy.

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Q: 2.1.5[2]

What is ecological succession?

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Q: 2.1.6[2]
Q: 2.2[2]

Give diagrammatic representation of pyramid of numbers.

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Q: 2.3 | Attempt any TWO of the following: [4]
Q: 2.3.1[2]
Q: 2.3.2[2]

How depletion of ozone layer affects living organisms?

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Q: 2.3.3[2]

Give graphic representation of cyclic photophosphorylation.

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Q: 2.3.4[2]

Explain the role of microbes in sewage treatment.

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Q: 3[9]
Q: 3.1 | Attempt any TWO of the following :[6]
Q: 3.1.1[3]

Describe the steps of PCR technique.

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Q: 3.1.2[3]

Write a note on multiple alleles considering example of human blood groups.

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Q: 3.1.3[3]

What is ‘biofortification’?

Explain what is meant by biofortification.

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

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Q: 3.2[3]

Sketch and label the T.S. of undehisced anther

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Q: 4 | Attempt any one of the following :[7]
Q: 4.1[7]

Describe the process of glycolysis with the help of schematic representation.

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Q: 4.2[7]

Explain semi-conservative replication of eukaryotic DNA.

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Q: 5 | Select and write the most appropriate answer from the given alternatives for each subquestion: [7]
Q: 5.1[1]

Elephantiasis is caused by _______.

(A) Wuchereria bancrofti

(B) Plasmodium vivax

(C) Bedbug

(D) Elephant

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Q: 5.2[1]

Genetically engineered human insulin is obtained by inserting the gene in _______.

(A) Pancreatic cells

(B) E. coli

(C) Agrobacterium tumefaciens

(D) Drosophila melanogaster

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Q: 5.3[1]

Urea splitting bacteria are responsible for _______ types of stones.

(A) calcium oxalate

(B) calcium phosphate

(C) calcium carbonate

(D) struvite 

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Q: 5.4[1]

The connecting link between ‘ape’ and ‘man’ is _______.

(A) Dryopithecus

(B) Australopithecus

(C) Homo erectus

(D) Homo neanderthalensis

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Q: 5.5[1]

Crippling disease is caused due to poisoning of _______ .

(A) Arsenic

(B) Lead

(C) Mercury

(D) Selenium

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Q: 5.6[1]

The genetic marker used as key factor in DNA fingerprinting is _______.

(A) VNTRs

(B) Exons

(C) Introns

(D) DNA probes

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Q: 5.7[1]

The trophoblast cells in contact with embryonal knob are called _______ .

(A) Inner mass cells

(B) Blastomere

(C) Amniogenic cells

(D) Cells of Rauber

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Q: 6[12]
Q: 6.1 | Answer the following in ‘One’ sentence each: [6]
Q: 6.1.1[1]
Q: 6.1.2[1]

Define the term ‘genome’.

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Q: 6.1.3[1]

Define organic evolution.

What is meant by organic evolution?

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Q: 6.1.4[1]

What is criss-cross inheritance?

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Q: 6.1.5[1]

Mention any ‘two’ functions of uterus.

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Q: 6.1.6[1]

What is Red Data Book?

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Q: 6.2[2]

Sketch and label the structure of chromosome.

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Q: 6.3 | Attempt any TWO of the following: [4]
Q: 6.3.1[2]

Explain the concept ‘survival of the fittest’.

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Q: 6.3.2[2]

Give economic importance of apiculture

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Q: 6.3.3[2]

Give the importance of transgenic animals.

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Q: 6.3.4[2]

Explain sex determination in human beings.

How is sex determined in human beings?

Explain the mechanism of sex determination in human being

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Q: 7[9]
Q: 7.1 | Attempt any TWO of the following: [6]
Q: 7.1.1[3]
Q: 7.1.2[3]

Explain the structure of antibody.

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Q: 7.1.3[3]

Give the effects of air pollutants on human health

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Q: 7.2[3]

Sketch and label ‘L.S. of human kidney’

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Q: 8 | Attempt any one of the following: [7]
Q: 8.1[7]

With the help of a labelled diagram describe the internal structure of human heart.

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Q: 8.2[7]

Describe the stages during three trimesters of pregnancy. 

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Explain the process of parturition.

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Add a note on lactation.

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