Download cell structures and functions - Indian School Al Wadi Al Kabir

INDIAN SCHOOL AL WADI AL KABIR
DEPARTMENT OF SCIENCE 2014 -15
`Work sheet 7
Class XI
BIOLOGY
Date: 30/11/14
CELL STRUCTURE & FUNCTION
1. Name the membrane which surrounds the vacuole in cell.
2. Who gave the statement ‘Omnis cellula e cellula’?
3. Give the significance of glycocalyx.
4. What is polysome?
5. List the functions of golgi bodies.
6. Mention two differences between SER & RER.
7. What are mesosomes? Mention their significances.
8. Multicellular organisms have division of labour. Explain.
9. What are the cell inclusions in prokaryotic cell?
10. Mention the similarities between mitochondria and chloroplasts.
11. Give four differences between prokaryotes and eukaryotes.
12. Describe the structure of cell wall.
13. What are the methods of passage of substances across the cell membrane?
14. What is the structure of ribosome? Name two organelles in which they are found.
15. What are the three structural elements of endoplasmic reticulum? Explain.
16. Describe the ultra structure of a cilium or flagellum.
17. Describe the structural organization of a typical eukaryotic chromosome. What
are different types of chromosomes on the basis of position of centromere?
18. Describe the structure of nucleus and centrosome with the help of labeled
diagram.
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19. Describe the composition of cell membrane as suggested by Singer and
Nicholson.
20. Observe the following diagram and answer the questions followed.
(a) Identify the figure (b) Explain the structure in detail
(c) Who proposed this model?
BIOMOLECULES
21. Which is the common sugar present in animals?
22. What is activation energy?
23. What is holoenzyme?
24. Describe the structure of the amino acid alanine?
25. In how many groups does polysaccharides classified?
26. How do proteins act as carrier proteins?
27. Why ATP is known as the energy currency of the cell?
28. What is competitive inhibition of enzyme? How is it different from non-competitive
inhibition?
29. How does temperature affect an enzyme catalyzed reaction?
30. What is the difference between nucleotide and nucleoside? Give one example of
each.
31. What are nucleotides? Describe their structure.
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32. Mention any three differences between DNA and RNA.
33. Differentiate between anabolic and catabolic pathways. How are the pathways
regulated?
34. Describe the structure of DNA as proposed by Watson and Crick.
35. What are co-enzymes? How do nucleotides form co-enzymes?
36. Describe the function of ATP.
37. What are the importance of vitamins? Explain.
CELL CYCLE
38. What are the three periods of interphase?
39. Why is meiosis called reduction division where as mitosis as equational division?
40. What is a kinetochore?
41. What do you understand by synaptonemal complex?
42. What does karyokinesis mean? What are its phases?
43. What are chiasmata? State their significance.
44. What is quiescent stage of cell cycle.
45. Distinguish anaphase of mitosis from anaphase I of meiosis.
46. What are the causes of anaphasic movement?
47. Differentiate between: (a) S phase & G2 phase.
(b) G1 phase & G2 phase
48. What is the need of meiosis in cell division.
49. Describe the following : (a) synapsis
diagrams to illustrate your answer.
(b) Bivalent (c) Chiasmata. Draw
50. List the differences between mitosis and meiosis.
51. How is cytokinesis different in animal cell and a plant cell?
52. Describe the sub-phases of prophase I.
53. Explain meiosis II in an animal cell.
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54. Observe the diagrams of Anaphases .Write the importance of these stages and
also write the differences between these two.
55. What is a syncitium? When is it formed?
Prepared by Ms. Rejitha S
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