Download SGBAU BSc 2019 Summer 4th Sem Botany Cell Biology Genetics n Biochemistry Question Paper

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1. (A) Fill in the blanks :
   1. Mendel performed Hybridization experiments in __________ plants.
   2. __________ is called as power house of a cell.
   3. Vacuole in the plant cell is bound by a membrane called as __________.
   4. Phenotypic ratio of monohybrid cross is __________.

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2. (B) Choose the correct alternative (MCQs) :
   1. Chromosome ends are called as
      1. Satellite
      2. Telomere
      3. Centromere
      4. Kinetochore

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   2. The protein part of enzyme is :
      1. Vitamins
      2. Holoenzyme
      3. Apoenzyme
      4. Prosthetic group

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   3. The loss of chromosome segment is known as :
      1. Duplication
      2. Deletion
      3. Inversion
      4. Translocation

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   4. The site of photosynthesis in plant cell is :
      1. Mitochondria
      2. Golgi Complex
      3. Chloroplast
      4. Nucleus

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3. (C) Answer in one sentence :
   1. Define Test Cross
   2. Define Polyploidy
   3. Give one example of Disaccharides
   4. Define linkage.

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2. Explain :

1. Functions of cell wall.
2. Ultrastructure of Nuclear membrane.
3. Fluid mosaic model of plasma membrane.

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OR

4. Functions of Plasma membrane
5. Structure of Chloroplast.
6. Difference between Prokaryotic and Eukaryotic cells.

3. Describe :

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1. Prophase and Metaphase in Mitosis.
2. Structure and functions of Endoplasmic reticulum.

OR

1. Zygotene and Pachytene in Meiosis.
2. Structure and functions of Mitochondria.

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4. Explain :

1. Telomeres
2. Duplication
3. Allopolyploidy

OR

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1. Morphology of chromosome
2. Deletion
3. Trisomy.

5. In sweet pea, the genes C and P when come together, produce purple flowers. But when either C or P is present alone, it produces white flowers.

What flower colours and their proportions will be produced in following crosses :

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1. CCPp x cc Pp
2. CcPp x ccPp
3. CcPp x ccPp
4. ccPP x CCpp

OR

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1. Dihybrid cross with suitable example.
2. Incomplete dominance with suitable example.

6. Comment on :

1. Complete linkage
2. Spontaneous Mutations

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3. Mitochondrial DNA.

OR

1. Types of crossing-over.
2. Induced Mutations
3. Chloroplast DNA

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7. Comment on :

1. Holoenzyme
2. Induced fit model of Enzyme action.
3. Structure of Starch.

OR

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1. Isomerases and Oxido-reductase.
2. Lock and Key Model of Enzyme action.
3. Functions of Monosaccharides.