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Important Questions for "Cell Biology":

[1]

  1. A cell is a basic unit of life. Prove it with suitable examples.
  2. Write a detailed note on Pleuro Pneumonia Like Organisms.
  3. Write a short note on Cell Junction.

[2]

  1. Differentiate between the following: (i) Prokaryotic and Eukaryotic cell (ii) Plant and Animal cell (iii) Mitosis and Meiosis (iv) Euchromatin and Heterochromatin
  2. What is cancer? Discuss various factors responsible for carcinogenesis.
  3. Describe the stages of meiosis with particular emphasis on Prophase-I.

[3]

  1. Why is the nucleus called the controlling center of a cell?
  2. Explain about animal cell with the help of a well-labeled diagram.
  3. Differentiate between the following terms: (i) Anaphase I and Anaphase II of meiosis (ii) Prokaryotic cell and Eukaryotic cell (iii) SER and RER

[4]

  1. Write detailed notes on structural differences between prokaryotic and eukaryotic cells and differences between normal and cancer cells.
  2. Discuss, with suitable diagrams, the various stages of prophase I of meiotic cell division.
  3. Write short notes on signal transduction pathways, role of Ca ions, muscle and nerve cells, and degradation of cellular components.

[5]

  1. What are the various mechanisms of membrane transport? Give a brief account of each of them.
  2. Describe the events during the cell cycle with the help of a diagram. Mention cell cycle regulation in brief.
  3. Describe the process of biosynthesis of mitochondria and chloroplasts. Highlight the differences (preferably with diagrams).

[6]

  1. Describe the structure of ribosome as observed under electron microscope giving details of ribosomal protein and ribosomal RNA.
  2. Write short notes on the following: (a) PPLO (b) Labelled sketch of prokaryotic cell (c) Interphase (d) Role of Ca ions in cell signalling.
  3. Describe in detail the process of protein synthesis in prokaryotes.

[7]

  1. Describe the structure and functions of bacterial cell wall.
  2. Write notes on: (a) Nucleus (b) Peroxysomes.
  3. What is phagocytosis? Describe the role of lysosomes in phagocytosis.

[8]

  1. Write short notes on the following: (a) Slime layer and capsule (b) Microtubules and microfilaments.
  2. Explain the various levels of organization with examples.
  3. Explain the structure of nuclear membrane.

[9]

  1. Who gave Fluid Mosaic Model? Comment upon different models of cell membrane structure.
  2. Describe the mechanism of transport across cell membrane.
  3. Describe the mechanism of osmotic protection in prokaryotes.

[10]

  1. Give a brief account of the various known levels of protein structure.
  2. Write detailed notes on denaturation and renaturation of proteins, and polysaccharides and their types.
  3. Describe the basic principles involved in chromatography. Discuss its role in plant biology.

[11]

  1. The gene which masks the expression of other gene is called?
  2. Unit membrane model of plasma membrane was proposed by?
  3. Which of the following is a purine base? Adenine?

[12]

  1. Meiosis is that kind of cell division in which the cell divides twice and chromosomes divide once?
  2. The sugar in a DNA is 2-deoxyribose?
  3. Peptide bonds are involved in linking amino acids?

[13]

  1. Which organelle contains hydrolytic enzymes?
  2. Which organelle is responsible for protein modification?
  3. Gene for color blindness is located where?

[14]

  1. Describe the operon model for regulation of gene activity.
  2. Define genetic material and briefly describe its properties. Describe one experiment which clearly showed that DNA is the genetic material.
  3. Describe Watson and Crick model of DNA structure. Discuss the differences between DNA and RNA.

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