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BIOLOGY

HomeBIOLOGYPage 23

39. The major role of golgi bodies is

(a)  Fermentation                    (b)  Phosphorylation (c)   Glycosidation                     (d)  Translocation Ans.  c

36. Dictyosomes are

(a)  Class of ribosomes (b)  Place of flagellar organelles (c)   Respiratory particles (d)  Golgi bodies (of plant cells) Ans.  (d)         ...

35. Which of the following structure is the functional unit in a golgi complex

  (a)  Cristae                               (b)  Cisternae (c)   Thylakoid                          (d)  None of the above Ans.b  

34. Cell wall materials are synthesized by

(a)  Dictyosomes                      (b)  Ribosomes (c)   Lysosomes                         (d)  Centrosomes Ans.  a

33. Zone of exclusion is associated with

(a)  Golgi complex                   (b)  Endoplasmic reticulum (c)   Mitochondria                    (d)  Chloroplast Ans.  a

31. Main function of dictyosomes is

(a)  Respiration                        (b)  Storage (c)   Secretion                           (d)  Breakdwon of fats Ans. b

30. Secretory and membrane proteins are processed in

(a)  Peroxisomes                      (b)  Glyoxysomes (c)   Golgi complex                   (d)  Sphaerosomes Ans. (c)      Golgi apparatus; because it secretes many types of metabolic...

29. The golgi apparatus is bounded by

(a)  Cellulose                            (b)  Hemicellulose (c)   Pectin                                 (d)  None of the above Ans.   d

28. Golgi bodies are absent in

(a)  Plants                                 (b)  Bacteria (c)   Animals                             (d)  Eukaryotic cells Ans.  b

27. In plants cells, the dictysomes are derived from

(a)  ER                            (b)  Plasma membrane (c)  Mitochondria        ...

26. The golgi apparatus contains

(a)  DNA (b)  RNA (c)   Phospholipids, proteins, enzymes and vitamin C (d)  Protein–lipid–protein. Ans. c

25. In plant cells the number of golgi bodies increases during

(a)  Cell division                       (b)  Food synthesis (c)   Translocation                    (d)  Respiration Ans.  b

24. Flattened sacs of golgi bodies are separated from each other by a space which is

(a)  13 Å                                   (b)  130 Å (c)   113 Å                                 (d)  30 Å Ans. d

23. Which is not function of golgibody

(a)  Secretion (b)  Formation of plasmamembrane (c)   Fat synthesis (d)  Cell wall formation   Ans.   (c)   Fat synthesis is the...

22. Golgi body originated from

(a)  Lysosome                          (b)  Endoplasmic reticulum (c)  Mitochondria                    (d)          Cell membrane...

21. Least stable endoplasmic reticulum is

(a)  Rough E.R.                         (b)  Smooth E.R. (c)   Cisternae                           (d)  Tubules Ans. b

20. Which of the following is responsible for mechanical support, enzyme transport and protein synthesis

(a)  Dictyosomes                      (b)  Cell membrane (c)   Mitochondria                    (d)  Endoplasmic reticulum Ans. (d) Endoplasmic reticulum is scattered from plasma membrane to...

19. RER is mainly concerned with

(a)  Proteolysis                               (b)  Fatty acids synthesis...

18. “Endoplasmic reticulum” was discovered by

(a)  Porter                                (b)  Altmann (c)   Golgi                                   (d)  Benda Ans. a

12. In endoplasmic reticulum the following process take place

(a)  Lipid synthesis (b)  Channeling of biosynthetic processes (c)   Steroid synthesis (d)  All of the above Ans.  d

19. The main difference between chlorophyll ‘a’ and ‘b’ is

(a)  Chlorophyll ‘a‘ is linear chain compound and ‘b‘ is branched chain (b)  Chlrophyll ‘a‘ has no Mg+ ion in...

18. Mark the incorrect statement

(a)  All cells do not contains a true nucleus (b)  Respiration occurs in mitochondria (c)   Cell walls are generally made...

17. The endoskeleton of cell is made up of

(a)  Cell wall                             (b)  Endoplasmic reticulum (c)   Cytoplasm                         (d)  Mitochondria Ans. (b)          Endoplasmic reticulum gives support to the cell.

16. The fine network of single unit membrane distributed extensively throughout the cytoplasm in a cell is referred to as

(a)  Golgi bodies                      (b)  Peroxisome (c)   Lysosome                           (d)  Endoplasmic reticulum Ans  d

15. When the region of endoplasmic reticulum are studded by ribosome on their outer surface of the cisternae, it is called

(a)  Sarcoplasmic reticulum (b)  Smooth endoplasmic reticulum (c)   Granular endoplasmic reticulum (d)  None of the above Ans. c

14. The endoplasmic reticulum often bears

(a)  Lysosomes                         (b)  Centrioles (c)   Peroxisomes                      (d)  Ribosomes Ans. d

13. Single unit membrane structure present in the cytoplasm in the form of a net is

(a)    Golgi complex                   (b)  Microtubules (c)   Microsomes                       (d)  Endoplasmic reticulum Ans.  d

12. In endoplasmic reticulum the following process take place

(a)  Lipid synthesis (b)  Channeling of biosynthetic processes (c)   Steroid synthesis (d)          All of the above Ans. d

35. Assertion : Mitochondria and chloroplasts are semiautonomous organelles. Reason : They are formed by division of pre-existing organelles as well as contain DNA but lack protein synthesizing machinery

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

34. Assertion : A cell membrane shows fluid behaviour. Reason : A membrane is a mosaic or composite of diverse lipids and proteins.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

31. Assertion : Cell wall is not found in animal cell. Reason : Animal cells are covered by cell membrane.

(a)      If both the assertion and the reason are true and the reason is a correct explanation of the assertion (b)      If...

33. Assertion : The number of cells in a multicellular organism is inversely proportional to the size of body. Reason : All the cells in the biological world are of same size.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

32. Assertion : It is important that the organisms should have cell. Reason : A cell keeps its chemical composition steady within its boundary.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

30. Assertion : Histones are basic proteins of major importance in packaging of eukaryotic DNA. DNA and histones comprise chromatine, forming the bulk of eukaryotic chromosome. Reason : Histones are 5 major types H1, H2A, H2B, H3 and H4.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

29. Assertion : DNA is associated with proteins. Reason : DNA binds around histone proteins that form a pool and the entire structure is called a nucleosome.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

28. Assertion : Mitochondria is known as power house of cell. Reason : ATP production takes place here.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

24. Assertion : Plasmids are double – stranded extra – chromosomal DNA. Reason : Plasmids are possessed by eukaryotic cells.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

23. Assertion : Meiosis takes place in pollen mother cells. Reason : Each pollen mother cell produce 4 haploid pollen grains.

Read the assertion and reason carefully to mark the correct option out of the options given below : (a)       If...

22. Assertion : Cell membrane is semipermeable. Reason : The constituent molecules can freely move in the membrane.

Read the assertion and reason carefully to mark the correct option out of the options given below : (a)       If...

21. Assertion : Schleiden and Schwann were the first to observe the cells and to put forward cell theory. Reason : The cells are always living unit.

(a)       If both the assertion and the reason are true and the reason is a correct explanation of the assertion...

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