Top 500+ 9th Class Biology Subject Mcqs Pdf Download Chapter No 07

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Encircle the most appropriate answer from the following options

1.         Food contains energy in its bonds in the form of:

(a) Kinetic energy      

(b) Potential energy

(c) Mechanical energy           

(d) All of these

2.         The loss of electrons is called:

(a) Oxidation 

(b) Reduction

(c) Redox       

(d) Both a &b

3.         Gain of electrons is called:

(a) Oxidation  

(b) Reduction

(c) Redox       

(d) Both a &b

4.         ATP was discovered by:        

(a) Fritz Lipmann        

(b) Karl Lohmann

(c) Malvin Calvin        

(d) Sir Hans Krebs

5.         ATP was discovered in:         

(a) 1923          

(b) 1925

(c) 1927                                 

(d) 1929

6.         ATP is an example of:

(a) Amino acid

(b) Fatty acid

(c) Nucleic acid          

(d) Nucleotide

7.         The ATP was proposed to be the main energy transfer molecule in the cell by:

(a) Fritz Lipmann     

(b) Karl Lohmann

(c) Malvin Calvin        

(d) Sir Hans Krebs

8.         Each ATP molecule has subunits:

(a) Two           

(b) Three

(c) Four          

(d) Five

9.         Number of phosphate groups in ATP molecule:       

(a) One           

(b) Two

(c) Three       

(d) Four

10.       From which bond of A.T.P. molecule energy is taken?        

(a) C-N bond  

(b) C-O bond

(c) C-H bond  

(d) P-P bond

11.       The covalent bond connected to two phosphate is:

(a) Ratio         

(b) Proportion

(c) Colon        

(d) Tilde

12.       How much energy is released by breaking of one phosphate bond of ATP?

(a) 7100 calories        

(b) 7200 calories

(c) 7300 calories       

(d) 7400 calories

13.       When one inorganic phosphate is detached from ATP, it is converted into:

(a) ADP          

(b) AMP

(c) Both a&b

(d) None

14.       Photosynthesis is:

(a) Anabolic process

(b) Catabolic process

(c) Both (a) and (b)

(d) Physical process

15.       In which process oxygen is released as a by-product?

(a) Photosynthesis  

(b) Respiration

(c) Fermentation        

(d) Reproduction

16.       Light reactions take place on:

(a) Thylakoid membranes   

(b) Stroma of chloroplasts

(c) Mitochondria         

(d) All of these

17.       Dark reactions take place in:

(a) Thylakoid membranes     

(b) Stroma of chloroplasts

(c) Mitochondria         

(d) All of these

18.       NADPH is formed during:

(a) Light reactions   

(b) Dark reactions

(c) Both (a) & (b)        

(d) None of these

19.       The break down of water molecule during light reactions is called:

(a) Glycolysis 

(b) Kreb’s Cycle

(c) ETC          

(d) Photolysis

20.       The details of dark reactions were discovered by:    

(a) Karl Lohmann

(b) Fritz Lipmann

(c) Melvin Calvin

(d) All of these

21.       When was Calvin awarded Nobel Prize?

(a) 1960          

(b) 1961

(c) 1962          

(d) 1963

22.       Photosynthetic pigments are arranged in the form of clusters called:

(a) Carotenoids          

(b) Chlorophyll-a

(c) Chlorophyll-b        

(d) Photosystems

23.       Main photosynthetic pigment:

(a) Carotenoids          

(b) Chlorophyll-a

(c) Chlorophyll-b        

(d) All of these

24.       Sun light is absorbed by:        

(a) Flower       

(b) Stem

(c) Chlorophyll         

(d) Roots

25.       Chlorophyll pigment absorbs maximum light in wavelengths of:

(a) Green and blue     

(b) Green and red

(c) Green       

(d) Red and blue

26.       Which one factor does not affect the rate of photosynthesis?          

(a) Light          

(b) Temperature

(c) Humidity  

(d) C02\

27.       From which bond of food energy is taken?   

(a) P-P bonds 

(b) C-H bonds

(c) C-N bonds

(d) C-O bonds

 28.      The greatest fuel of energy of cellular respiration is:

(a) Glucose   

(b) Proteins

(c) Amino acid

(d) Lipids

29.       In cellular respiration, food is oxidized to:

(a) C02           

(b) H20

(c) Both a & b           

(d) CO

30.       The most common fuel used by cell to get energy from cellular respiration is:

(a) Glucose   

(b) Oxygen

(c) Carbon dioxide     

(d) Food

31.       Through which process organism gets energy?       

(a) Photosynthesis     

(b) Respiration

(c) Transpiration         

(d) Evaporation

32.       Alcoholic fermentation occurs in:

(a) Bacteria    

(b) Yeast

(c) Both (a) and (b)  

(d) Humans

33.       Whose fermenting powers are used for making cheese and yogurt?          

(a) Bacteria   

(b) virus

(c) Fungi         

(d) Algae

34.       In which phase of respiration glucose molecule is broken in to two molecules of pyruvic Acid?

(a) Glycolysis

(b) Krebs cycle

(c) Electron transport chain   

(d) None of these

35.       Soy sauce is made through the fermentation by a fungus:

(a) Rhizopus   

(b) Penicillium

(c) Aspergillus          

(d) All of these

36.       How many stages are present in aerobic respiration?          

(a) 1

(b) 2

(c) 3

(d) 4

37.       Process of glycolysis is found in:

(a) Ribosomes

(b) Cytoplasm

(c) Golgi complex      

(d) Vacuole

38.       In electron transport chain each NADH produces:   

(a) 2 ATP       

(b) 3 ATP

(c) 4 ATP       

(d) 5 ATP

39.       In which step of respiration C02 is produced?          

(a) Glycolysis 

(b) Krebs cycle

(c) Electron transport chain   

(d) All of these

40.       How many molecules of C02 are produced when kreb’s cycle operates once?

(a) 6

(b) 3

(c) 2

(d) 1

41.       How many ATP molecules are generated in aerobic respiration?

(a) 2

(b) 24

(c) 34  

(d) 36

42.       In cell, aerobic respiration sites are:

(a) Golgi bodies          

(b) Mitochondria

(c) Ribosomes

(d) Chloroplast

43.       How many ATP molecules are generated in anaerobic respiration?

(a) 2

(b) 24

(c) 34  

(d) 36

44.       Krebs cycle and electron transport chain occur in:   

(a) Cytoplasm

(b) Nucleus

(c) Mitochondria      

(d) Ribosomes