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Question Paper - Biology 2014 - 2015-H.S.C-12th Board Exam Maharashtra State Board (MSBSHSE)

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SubjectBiology
Year2014 - 2015 (March)


Marks: 70
Q: 1 | Select and write the most appropriate answer from the given alternative for each sub-question:[7]
Q: 1.1[1]

A cross used to verify the unknown genotype of FI hybrid is a_______________

  1. test
  2. back
  3. dihybrid
  4. monohybrid
view solution
Q: 1.2[1]

Appearance of new combinations in F2 generation in a dihybrid cross proves the law of_____________ .

  1. dominance
  2. segregation
  3. independent assortment
  4. purity of gametes
view solution
Q: 1.3[1]

A fine powder of recycled modified plastic is known as___________________ .

  1. polyblend
  2. polythene
  3. polyester
  4. polymer
view solution
Q: 1.4[1]

The partially decomposed organic matter is formed by a process called

  1. fragmentation
  2. humification
  3. mineralisation
  4. leaching
view solution
Q: 1.5[1]

Transfer of genetic material into a bacterial cell through a viral vector is known as

  1. transformation
  2. transduction
  3. transfection  
  4. translation
view solution
Q: 1.6[1]

If the number of chromosomes in an endosperm cell is 27, what will be the chromosome number in the definitive nucleus?

  1. 9
  2. 18
  3. 27
  4. 36
view solution
Q: 1.7[1]

Lever mechanism of pollination is observed in

  1. Salvia
  2. Jasmine
  3. Bougainvillea
  4. Butea
view solution
Q: 2[12]
Q: 2.1 | Answer each question in 'one' sentence only[6]
Q: 2.1.1[1]

A pea plant pure for yellow seed colour is crossed with a pea plant pure for green seed colour. In F1 generation all pea plants were with yellow seeds. Which law of Mendel is applicable?

view solution
Q: 2.1.2[1]

Name the enzyme responsible for delay in ripening of tomato fruit.

view solution
Q: 2.1.3[1]

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

view solution
Q: 2.1.4[1]

Name the high-yielding semi-dwarf varieties of wheat selected and introduced in India in 1963.

view solution
Q: 2.1.5[1]

'Formation of primary endosperm nucleus is called triple fusion'. Give reason

view solution
Q: 2.1.6[1]

Mention any 'two' ecological services forthe benefit of mankind

view solution
Q: 2.2[2]

Sketch and label 'tubular tower fermenter'.

view solution
Q: 2.3 | (C) Attempt any TWO of the following[4]
Q: 2.3.1[2]

Global warming is caused by'greenhouse effect'. Justify.

view solution
Q: 2.3.2[2]

With the help of a neat and labelled diagram explain VAM (vesicular arbuscular mycorrhizae).

view solution
Q: 2.3.3[2]

Distinguish between light and dark reactions.

view solution
Q: 2.3.4[2]

Mendel selected the garden pea plants for his experiments. Explain

view solution
Q: 3[6]
Q: 3.1 | (A) Attempt any TWO of the following:[6]
Q: 3.1.1[3]

With the help of a neat and labelled diagram describe the steps in recombinant DNA technology.

view solution
Q: 3.1.2[3]

What is 'tissue culture'?

view solution

Describe the methodology of tissue culture.

view solution
Q: 3.1.3[3]

Define vegetative propagation. 

view solution

Differentiate between 'stem tuber' and 'tuberous root'.

view solution
Q: 3.2[3]

Sketch and label T.S of angiospermic anther.

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

With the help of a neat and labelled diagram describe Watson and Crick's model of DNA.

view solution
Q: 4.2[7]

With the help ofschematic representation explain Krebs cycle.

view solution
Q: 5 | Select and write the most appropriate answer from the given alternatives for each sub-question :[7]
Q: 5.1[1]

In gene therapy, DNAase is used to treat_______________ .

  1. cystic fibrosis
  2. haemophilia
  3. pituitary dwarfism
  4. insulin dependent diabetes
view solution
Q: 5.2[1]

If only one 'X' chromosome is found in a female person, which of the following symptoms she will show?

  1. epicanthal skin fold
  2. webbing of neck
  3. small testis and absence of spermatogenesis
  4. presence of simian crease on the palm
view solution
Q: 5.3[1]

In which of the following haploid cells a whole genome in human being is present?

  1. sperm
  2. somatic cell
  3. mature RBC
  4. primary spermatocyte
view solution
Q: 5.4[1]

Which of the following is NOT an example of connecting link?

  1. Archaeopteryx
  2. fchthyostegia
  3. Seymouria
  4. Biston betularia
view solution
Q: 5.5[1]

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
view solution
Q: 5.6[1]

Normal activities of the heart are regulated by

  1. brain
  2. spinal cord
  3. modified cardiac muscles
  4. hormones
view solution
Q: 5.7[1]

During .............. typs of interaction, both organisms are benefited

  1. mutualism
  2. competition
  3. commensalism
  4. parasitism
view solution
Q: 6[12]
Q: 6.1 | (A) Answer the following in one-sentence each:[6]
Q: 6.1.1[1]

What is gene pool?

view solution
Q: 6.1.2[1]

Give any 'two' names of X-linked diseases

view solution
Q: 6.1.3[1]

What does abbreviation HGP stand for?

view solution
Q: 6.1.4[1]

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

view solution
Q: 6.1.5[1]

In the electrocardiogram shown below, which wave represents ventricular diastole?

view solution
Q: 6.1.6[1]

Which method of conservation of biodiversity includes 'hotspot' method?

view solution
Q: 6.2[2]

Sketch and label ventral view of human heart.

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

Distinguish between ape and man.

view solution
Q: 6.3.2[2]

Give the applications of DNA fingerprinting technique.

Mention DNA fingerprinting application.

view solution
Q: 6.3.3[2]

Explain the various types of cancer

view solution
Q: 6.3.4[2]

Give the significance of fertilisation

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

What will be the phenotype of progeny, if a carrier haemophilic female marries a normal male?

view solution
Q: 7.1.2[3]

Explain with tile help of a chart, explain the compatibility of human blood groups.

view solution
Q: 7.1.3[3]

Justify the conservation of endangered species of plants and animals is necessary

view solution

Justify Pollution Under Control (PlUC) certificate is mandatory for all vehicles and industries

view solution
Q: 7.2[3]

Sketch and label 'structure of nephron'.

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

With the help of a labelled diagram of lateral view of cerebrum, describe the structure and give any 'two' functions of cerebrum.

view solution
Q: 8.2[7]

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

view solution
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