Study Material
THE UNIT OF LIFE
Very Short Answer Questions
Q1. What is the significance of vacuole in a plant cell ?
Q2. What does 'S' refer in a 70S & and 80S ribosome?
Q3. Mention a single membrane bound organelle which is rich in hydrolytic enzymes.
Q4. What are gas vacuoles ? State their functions?
Q5. What is the function of a polysome?
Q6. What is the feature of a metacentric chromosome ?
Q7. What is refered to as satellite chromosome?
Q8. What are microbodies? What do they contain ?
Q9. What is middle lamella made of ? What is its functional significance ?
Q11. Which part of the bacterial cell is targeted in gram staining?
Q12. Which of the following is not correct?(a) Robert Brown discovered the cell.(b) Schleiden and Schwann formulated the cell theory.(c) Virchow explained that cells are formed from pre-existing cells.(d) A unicellular organism carries out its life activi
Q13. New cells generate from(a) bacterial fermentation (b) regeneration of old cells (c) pre-existing cells(d) abiotic materials
Q14. Match the following (a) Cristae (1) Flat membranous sacs in stroma(b) Cisternae(II) Infoldings in mitochondria
Q15. (c) Thylakoids(iii) Disc-shaped sacs in Golgi apparatus
Q16. Which of the following is correct:(a) Cells of all living organisms have a nucleus.(b) Both animal and plant cells have a well defined cell wall.(c) In prokaryotes, there are no membrane bound organelles.(d) Cells are formed de novo from abiotic mat
Q1. Describe the cell organelle which contains chlorophyll pigments.
Q2. Describe the structure and function of power houses of cell.
Q3. Comment on the cartwheel structure of centriole.
Q4. Briefly describe the cell theory.
Q5. Differentiate between Rough Endoplasmic Reticulum (RER) and Smooth Endoplasmic Reticulum (SER).
Q6. Give the biochemical composition of plasma membrane. How are lipid molecules arranged membrane? in the
Q7. Describe the structure of nucleus.
Q8. Give a brief account of the types of chromosomes based on the position of centromere.
Q9. What is Cytoskeleton? What functions is it involved in?
Q10. What is endomembrane system? What cell organelles are not included In it? Why?
Q11. Distinguish between active transport and passive transport.
Q12. What are nucleosomes ? What are they made of?
Q13. Name two cell-organelles that are double membrane bound. State their functions and draw labelled diagrams of both.
Q14. What are the characteristics of a prokaryotic cell?
Q15. Briefly give the contributions of the following scientists in formulating the cell theory a). Rudolf Virchow b).Schleiden and Schwann
Q1. What structural and functional attributes must a cell have to be called a living cell?
Q2. Group the various sub-cellular organelles into these three categories. a). Not be bound by a membrane b). Bound by a single membrane c). Bound by a double membrane
Q3. The genomic content of the nucleus is constant for a given species where as the extra chromosomal DNA is found to be variable among the members of a population. Explain.
Q4. Justify the statement. Mitochondira are power houses of the cell.
Q5. Is there a species specific or region specific type of plastids? How does one distinguish one from the other?
Q6. Write the functions of the following a. Centromere b. Cell wall c. Smooth ER d. Golgi Apparatus e. Centrioles
Q7. Are the different types of plastids interchangeable? If yes, give examples where they are getting converted from one type to another.
Q8. Describe the structure of the following with the help of labeled diagrams. (i) Nucleus (ii) Centrosome
Q9. What is a centromere? How does the position of centromere form the basis of classification of chromosomes. Support your answer with a diagram showing the position of centromere on different types of chromosomes.
Q1. What is a mesosome in a prokaryotic cell? Mention the functions that it performs.
Q2. How do neutral solutes move across the plasma membrane? Can the polar molecules also move across it in the same way? If not, then how are these transported across the membrane?
Q3. Name two cell-organelles that are double membrane bound. What are the characteristics of these two organelles? State their functions and draw labelled diagrams of both.
Q4. What are the characteristics of prokaryotic cells.
Q5. Multicellular organisms have division of labour. Explain.
Q6. Cell is the basic unit of life. Discuss in brief.
Q7. What are nuclear pores? State their function.
Q8. Both lysosomes and vacuoles are endomembrane structures, yet they differ in terms of their functions. Comment.
Q9. Describe the structure of the following with the help of labelled diagrams. (1) Nucleus (11) Centrosome
Q10. What is a centromere? How does the position of centromere form the basis of classification of chromosomes. Support your answer with a diagram showing the position of centromere on different types of chromosomes.
Q11. Is extra genomic DNA present in prokaryotes and eukaryotes ? If yes, Indicate their location in both the types of organisms.
Q12. Structure and function are correlatable in living organisms. Can you justify this by taking plasma membrane as an example ?