MOST EXPECTED MCQs of CLASS IX SCIENCE [BIO] FUNDAMENTAL UNITS OF LIFE

MOST EXPECTED MCQs OF CLASS IX SCIENCE [BIO] FUNDAMENTAL UNITS OF LIFE

MULTIPLE CHOICE QUESTIONS

1. Which of the following organelle is involved in the formation of lysosomes.

a. Ribosome              b. Golgi Apparatus               
c. Mitochondria       d. Plastids.

2. Ribosomes are the site of

a. Protein synthesis  b. Lipid synthesis   
c Respiration          d Photosynthesis

3.The barrier between the protoplasm and the external environment in an animal cell is

a. Cell wall               b. Nuclear membrane    
c. Plasma membrane    d. Cytoplasm

4. Cell nucleus  was  discovered by

a. Robert Hooke     b. Robert Brown            
c Virchow                  d. Leeuwenhoek

5. Lipid molecules in the cell are synthesised by

a. SER                    b. RER                           
c. Golgi bodies           d. Ribosomes

6. Powerful digestive enzymes are present in

a. Ribosomes        b. Lysosomes                  
c. SER                        d. RER

7. A cell “X” contains a cell wall, a big vacuole and chloroplast. The cell “X” is _

a. Plant cell           b. Animal cell                 
c. Bacterial cell         d. Prokaryotic cell

8. When raisins  are soaked in water, they(i)  _____  due to the process of  (ii)____

a. i- shrinks, ii- endosmosis                      b. i- swells, ii- Exosmosis

c. i- shrinks, ii- exosmosis                        d. i- swells, ii- endosmosis

9.Which of the following statement is incorrect

a. Lysosomes are  called suicidal bags b. Vacuoles  are storage sacs.

c. Plasma membrane is made of cellulose   d. Amoeba acquires its food through endocytosis.

10.Plasmolysis in plant cell means

a. Shrinkage of nucleoplasm                 b. Shrinkage of  protoplasm

c. Breakdown of cell wall                      d .Both a &b

11.Which of the following  plays a central role in cellular reproduction.

a. Mitochondria         b. Endoplasmic reticulum      
c. Nucleus                  d. Lysosomes.

12.Which of the following plays a crucial role in detoxification.

 a. SER                      b. RER                       
 c. Mitochondria        d. Both a&b

13.The colourless fluid present within the chloroplast is called as

 a. Matrix                        b. Grana                     
c. Stroma                        d. Cell sap

14.Chlamydomonas is

 a. Multicellular           b. Unicellular               
c .Prokaryotic               d. Both a &c  

15.Which of the following provides turgidity and rigidity to the plant cell

a. Mitochondria         b. Ribosomes      
c. Dictyosomes          d. Vacuole 

16.Who coined the term protoplasm

a. Virchow                    b. Purkinje                    
c. Leeuwenhoek            d. Robert Brown

17.Hen’s egg is a 

 a.Cell                          b.Tissue                         
c.Organ                        d.None of these

18.Which of the following organelle serves as channels for the transport of materials

a.Lysosomes               b.Endoplasmic reticulum     
c.Plastids                    d.Vacuole

19.In plant cells starch is stored in

a.Chloroplast               b.Leucoplast                        
c.Chromoplast             d.Both b&c

20.Plasma membrane is ...............................

a.Flexible                           b.Selectively permeable     
c.Lipoprotein membrane   d All of these. 

ANSWER KEY

1.b,2.a,3.c,4.b,5.a,6.b,7.a,8.d,9.c,10.b,
11.c,12.a,13.c,14.b,15.d,16.b,17.a,18.b,19.b,20.d.