Biology class 9th

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Best MCQs Biology 

Most Repeated MCQs 



Zacharias Jansen invent compound microscope in________?

Ans:1590


2:The magnification range of compound microscope was?

Ans: 3X to 9X


3:The enlargement of an image is called?

Ans:Magnification


4:It helps to measure clarity of object?

Ans:Resolution


5:A photograph of an image taken through a microscope is called?

Ans:Micrograph


6:Electron microscope have a much________wavelength than visible 

light?


Ans:shorter


7:A live cell can't be imaged by________?

Ans:Electron microscope


8:Electron microscope has resolution as small as 0.2(nm) and magnification up to________ times?


Ans: 250'000


9:How many types of Electron microscope?

Ans:2 scanning and transmission


10:In scanning Electron microscope a Beam of Electron moves______and_______?

Ans:Back and Forth


11:Cell was  observed by Robert Hooke in?

Ans:1665


12:The centre of cell was seen by Robert Brown in?

Ans:1833


13:Cell is basic and  functional unit of life this theory was given in 1839 by which two scientist?

Ans:A Belgian Botanist schleiden and German zoologist Schwan


14:Viruses prions and viroids are not composed of cell are called?

Ans:Sub Cellular or acellular


15:These have proper nucleus and membrane bound organelles is called?

Ans:Eukaryotic cell


16:plant cells are generally in cubicle shape while animal cells are__________shape?

Ans:Spherical


17:The hereditary information of cell is called?

Ans:DNA


18:Organism whose cell does not have proper bound nucleus is called?

Ans:prokaryotic


19:What is size of prokaryotic cell?

Ans:1 to 101 m


20: what is size of Eukaryotic cell?

Ans:1 to 1000 lm


21:Nucleus is generally found at the center of cytoplasm in____________?

Ans:Animal cell


22:Centrioles is absent in________?

Ans:Plant cells


23:_________is protective rigid permable tough and non living?

Ans:Cell wall


24:Cell membrane is also called?

Ans:plasma membrane


25:In plants  cell wall is mainly composed of__________?


Ans: Celloluse 



26:Bacterial cell wall is composed of sugar and Amino acid is called?

Ans:Peptidoglycan



27:The fungal cell wall is composed of___________?

Ans:Chitin glucan and protein


28:Cell wall is composed how many layers?


Ans:3 Middle lamella primary cell wall and Secondary cell wall


29:It separates one cell from other cell?

Ans:Middle lamella


30:Middle lamella is made up of sticky substance is called?

Ans:Pectin and Celloluse


31:__________lies inside of middle lamella is called?

Ans:primary cell wall


32:The openings in the cell wall is called?

Ans: Plasmodesmeta


33: The first step of biological problem is --------?

Ans: Observation 


34: In ----------- a French physician Laveran studied the blood sample of  malaria patient under microscope? 


Ans: 1880



35: ---------- is key components of scientific process ?



Ans:  Hypothesis 


36: ---------- is a intelligent guess made by scientists in the form of statement ?


Ans: Hypothesis 



37: How many types of reasoning? 

Ans: 2  Inductive reasoning and  deductive reasoning 



38: ----------- moves from specific to general ?


Ans: Inductive reasoning 


39: ------------ moves from general to specific ?


Ans: Deductive reasoning 



40: ---------- is based on if and then statement ?

Ans: Deductive reasoning 



41: ----------- types of experiment ?

Ans: 2  control group and  experimental group 


42: The final step of scientific process is-------?

Ans: Conclusion 


43: --------- is a uniform and constant fact of nature ?


Ans: Law and principle 

44: --------- is comparison of two values? 


Ans: Ratio 


45: --------- is an equation stating the two ratios ?


Ans: proportion 






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