BIOLOGY

1- There are 16 chromosomes in the zygote of onion plant. What will be the number of chromatids in the leaf of onion cells.

A-  4        B-  8          C-  16          D-  32        E-  64

2-What is the basic reasion why doughter cells have identical hereditary material after mitotic cell division?

A-Formation of chromosomes from  two chromatids 

B-Replication of DNA molecules 

C- Separation of sister chromatids

D- Separation of homologous chromosomes                

E- Division of cytoplasm into two

3-Which of the following is a difference between mitosis and meiosis ?

A-Replication of  DNA         B-Formation of spindle fibers          C-Location of chromosome on equator of cell

D- Shortening and thickening of chromosomes  

E- Formation of chromatids

4-Which of the following is the name of exchance of parts between homologous chromosomes ?

A- Crossing-over       B-Translation         C-Transcription

D- Linked-genes         E- Transpiration

5-Which isnt correct for meiosis ?

A- It reduces the chromosome number into half   

B- Occurs only in plant cell 

C- Occurs only in reproductive cells

D- Four cells form at the end of the meiosis            

E- Involves two divisions

6-       I- Different number of chromosome  

           II- Different structure of chromosome        

          III- Increasing in number of varieties

Which one is seen at the and of the crossing-over ?

a) I         b) II            c)  I-II                  d) I-III                e) II-III

7-Which of the following best describes the energy carrier capacity?

a)Cytochromes-FAD-NAD-O2 b)FAD-NAD-Cytochromes-O2       c)NAD-Cytochromes-O2-FAD d)Cytochromes-NAD-FAD-O2        e)NAD-FAD-Cytochromes-O2

8-Examine the following list of molecules.

         I-ATP     II-ADP    III-CO2      IV-NADPH+H

  Which of the molecules listed above are produced during the

   dark phase of photosynthesis ?

     A- II and III  B- I and IV  C- II and IV    D- IV    E- II

9-  1.  Anaerobic reactions

     2.  Cyclic photophosphorylation

     3.  Noncyclic  photophosphorylation

In which of the above reactions are other molecules not broken down?

A) Only 1   B) Only 2      C) Only 3      D) 2 and 3     E) 1-3

10-During the light phase of photosynthesis , the following events  occur:

I-Synthesis of ATP            II-Utilisation of light

III-NADPH2 synthesis      IV-H2O synthesis

    Which of the events above are shared by both cyclic and noncyclic photophosphorylation ?

A-I - II   B- I - III   C- III - IV   D- II - IV  E- I - IV

11-In which of the following plant organs is photosynthesis fastest ?

A-Spongy parenchyma       B-Cuticle         C-Epidermis

D-Palisade parenchyma          E-Phloem vessels

12- In which of the following parts of  leaf  doesnt  photosynthesis take place?

1.Palisade layer                 2.Stoma                3.Epidermis                  4.Vein                 5.Spongy layer

A- All of them       B- 1-5       C- 1-2-5        D- 2-3-5          E- 3-4

 

 

 

MIDTERM 4

13-Dark reaction of photosynthesis takes place in .

A-Mitochondria   B-Stroma   C-Grana  D-Matrix   E-Cristae

14-Which of the followins is genetic factor affecting photosynthesis?

A-Light intensity         B-Tick of leaf          C-Amount of water          D-Temparature         E- None

*15- A diploid cell (2n=10) divides two times by mitosis and then each of the formed cells divides by meiosis. What would be the number of cells and number of chromosomes in each cell at the and of the divisions ?

         Cells number              Chromosomes

a)                            16                                  5

b)                             4                                  10

c)                            16                                 10

d)                             4                                   5

e)                            32                                 10

 

*16- Which of the following cells is formed as a result af meiosis

A- Muscle cells         B- Skin cells          C- Egg cells     

    D- Nerve cells         E- Blood cells

17-         Homologous chromosomes are

A- Sister chromosomes      B- Contain different information             

C- Brother chromosomes

D- Contain half of  each others chromosomes                

E- Contain same information in same order

18-     1- Meiosis      2- Mitosis      3- Asexually reproduction

Which of the above cause genetic variety in living things ?

A-  1,2         B-  2,3          C-  2         D-  1,2,3             E-  1

19-         Crossing-over occurs in..

A- Interphase I           B- Prophase I        C- Prophase II        

   D- Anaphase II           E- Anaphase I

20-         Which of the following is a difference between mitosis in plant and animal cells?

A-Thickening of chromosomes            B-Replication of DNA                           C-Division of cytoplasm        D-Separation of chromatids                          .                         E-Location of chromosomes

21-A cell which has 22 pairs of homologous chromosomes, divides 11 times by mitosis. What will be the chromosome number in each formed cell at the end of the division ?

A- 88        B- 22       C-  44       D- 22: 11      E- 22+11

22-In plant cells, spindle fibers are formed by

        A- Centromere       B- Centriole       C- Centrosome

                  D- Microtubules        E- Chromosome

23-    Growth and asexually reproduction occur by means of.

A-Mitosis   B-Budding   C-Synapsis   D-Meiosis  E-Reproduction

24-Which of the following structures doesnt  take role in the cell division?

A- Chromosome        B- Spindle fibers        C- Centrosomes

D- Mitochondria            E- DNA

25- (n=8) at a diploid cell of an organisms. How many chromatids are there at the mitosis of this cell?

A- 4           B- 8            C- 16            D- 32            E- 64

 

 

EACH ONE IS 4 POINTS

TIME: 35 MIN

                                                 

 

 

                                                              AHMET KALALI

                                                          BIOLOGY TEACHER

 

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