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Important Questions for "Cell Biology":

[1]

  1. Write a detailed note on Chloroplast.
  2. Write a detailed well-labeled diagram of Lysosome and Peroxisome.
  3. What do you understand about Squamous Cell Carcinoma and Adenocarcinoma?

[2]

  1. What do you mean by cell signaling? Give mode of working of cAMP in transduction of cell signals.
  2. What do you mean by membrane system? Describe the same with reference to Endoplasmic Reticulum (ER) and Golgi Complex.
  3. What are glycoproteins and glycolipids? Discuss their structure and function within the cell.

[3]

  1. Why is the nucleus called the controlling center of a cell?
  2. Write detailed notes on the following: (i) Programmed cell death (ii) Suicidal bags
  3. Write very short answers for the following: (i) Difference between plant cell and animal cell (ii) Peroxisomes (iii) Nerve cells (iv) Functions of chloroplast

[4]

  1. Draw a diagram depicting 'Fluid mosaic model' of cell membrane structure and explain the various components of the cell membrane.
  2. What is central dogma? Describe the role of DNA and RNA in protein synthesis.
  3. Write notes on differences between meiotic and mitotic cell division, differences between transcription and translation, and ultrastructure and function of Golgi complex.

[5]

  1. Give an account of the ultrastructure, biochemistry, and function of the nucleus.
  2. What is the cytoskeletal system? Describe all the components of cytoskeleton in detail.
  3. Describe the process of biosynthesis of mitochondria and chloroplasts. Highlight the differences (preferably with diagrams).

[6]

  1. Write short notes on the following: (a) PPLO (b) Labelled sketch of prokaryotic cell (c) Interphase (d) Role of Ca ions in cell signalling.
  2. Describe the structure and function of chromosome.
  3. Describe in detail the process of protein synthesis in prokaryotes.

[7]

  1. Discuss about the structure and functions of mitochondria.
  2. Describe the different levels of cell organization in an organism.
  3. Write notes on: (a) RER (b) Nucleoplasm.

[8]

  1. Write short notes on the following: (a) Slime layer and capsule (b) Microtubules and microfilaments.
  2. Draw labelled diagrams of the following: (a) Nucleus (b) Chloroplast (c) Prokaryotic cell (d) Flagella of Gram-positive bacteria.
  3. Differentiate between the following: (a) Active and passive transport (b) Cell wall of Gram-positive and Gram-negative bacteria.

[9]

  1. Comment upon various levels of organization.
  2. Give a detailed ultrastructure of any four of the following: Golgi bodies, Endoplasmic reticulum, Ribosomes, Cytoskeletal, Mitochondria, Chloroplast.
  3. Write down the main features of prokaryotic cell wall. Differentiate prokaryotic cell wall from the cell wall of eukaryotic microbes.

[10]

  1. Write short notes on plasma membrane, plasmodesmata, ion carriers, synaptonemal complex, programmed cell death, protein hydrolysis, amino acid sequencing, carbohydrate metabolism, biosynthesis of amino acid, and enzyme kinetics.
  2. Give a brief account of the various known levels of protein structure.
  3. Write detailed notes on denaturation and renaturation of proteins, and polysaccharides and their types.

[11]

  1. If haploid number of chromosomes in a cell is 12, then the trisomic number will be?
  2. Unit membrane model of plasma membrane was proposed by?
  3. Down's syndrome is an autosomal abnormality?

[12]

  1. Which one of the following structures is an organelle within an organelle?
  2. Synapsis takes place at which of the following stage?
  3. The sugar in a DNA is 2-deoxyribose?

[13]

  1. Which dictum states that all cells arise from pre-existing cells?
  2. Which is the smallest cell?
  3. What kind of replication does DNA undergo?

[14]

  1. Define genetic material and briefly describe its properties. Describe one experiment which clearly showed that DNA is the genetic material.
  2. Describe Watson and Crick model of DNA structure. Discuss the differences between DNA and RNA.
  3. What is genetic code? Discuss the various properties of genetic code giving suitable examples.

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