Wednesday, April 28, 2010

SPIROGYRA-PROBLEMS AND APPLICATIONS



1.         A water sample contains 5 filaments of spirogyra adnata, 5 filaments of spirogyra jogensis and 10 filaments of spirogyra gratiana(free floating). If each filament contains 10 cells. What will be the number of the following cells from this water sample
            A) Total no of cells capable to divide
            B) Total no of cells lack chlorophyll
            C) Total no of cells capable to involved in reproduction
            D) Total no of cells not involved in  growth
2.         A spirogyra gratiana filament with 40 cells undergo divisions for 3 generations. what will be the total no of cells found in the filament after 3 generations.
3.         A spirogysra jogensis filament with 24 cells undergo divisions for 3 generations. How many cells are found in the filament after 3 generations.
4.         A filament of S. Venkataramani shows 254 chloroplasts. What will be the no. of following from this filament
A) Number of cells                                                     B) Number of Nuclei  
C) Number of vacuoles                                               D) Number of  pyrenoids.
5.         A chloroplast in  S. Venkataramani cell  having 24 pyrenoids. The distance between the two pyrenoids is 0.2m. What will be the length of chloroplast.
6.         A vegetative cell of S. Venkataramani shows a chloroplast which is 40m in length. The distance between the 5th and 6th pyrenoids is 2m ,What will be the no of pyrenoids seen on the chloroplast.
7.         The two filaments of spirogyra each one with 24 cells are involved in physiological anisogamous scalariform conjugation. If all the cells are involved in conjugation, what will be the no of following structures from this information?
            A) No of cells having zygospores                   B) No of empty cells
            C) No of conjugation tubes
            D) No of gametes shows amoeboid movement
8.         The two filaments of Spirogyra each one with 32 cells are involved in isogamous scalarifor conjugation. If all the cells are involved in conjugation, what will be the no of following structures from this information?
            A) No of cells having zygospores          B) No of empty cells           
            C) No of conjugation tubes                   D) No of gametes shows amoeboid movement
9.         The two filaments of spirogyra gratiana are involved in conjugation. Each filament contains 48 cells. 20 conjugation tubes are present between the two filaments. If  all the cells are involved in physiological Anisogamous conjugation.what will be the no of following structures from this information
            A) No of cells having zygospores          B) No of empty cells
            C) No of conjugation tubes                   D) No of gametes shows amoeboid movement
10.       A filament of s. affinis with 29 cells is involved in conjugation. What will be the no of cells having zygospores and no of conjugation tubes.

11.       A filament of S. Jogensis with 25 cells is involved in conjugation. what will be the no of following structures from this information.
            A) No of cells having zygospores
            B) No of empty cells  
            C) No of conjugation tubes
            D) No of gametes shows amoeboid movement
            E) No of  cells become colourless after conjugation.
12.       The two filaments of spirogyra each one with 40 cells are involved in conjugation. All the cells are act as gametangia and produce gametes. 20 + Gametes are involved in the formation of zygospores. How many new filaments are produced from these two filaments.
13.       A filament Spirogyra with 24 cells is involved in conjugation. If all the cells are involved in the formation zygospores, How many nuclei are degenerate at the time of germination of zygospores
KEY

1.       A) 190     B) 10        C) 190       D) 10
2.       320
3.       185
4.       A) 254     B) 254      C) 254       D) Many
5.       4.6 m
6.       21
7.       A) 24       B) 24        C) 24         D) 24
8.       A) 0         B) 64        C) 32         D) 64
9.       A) 48       B) 48        C) 48         D) 48
10.     14, 14
11.     A) 1      B) 1         C) 0          D) 1       E) 1
12.     60
13.     36

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