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Haemoglobin is a protein which carries……… to all part of body.
a) carbon                                              

b) oxygen
c) nitrogen                                            

d) hydrogen

b

Proteins like………are chemical regulators in the body.
a) hormons                                          

b) enzymes
c) both a & b                                       

d) none of these

c

Explanation:-
Enzyme:-
Enzyme are complex organic compounds which speed up a biological reaction without any change in itself.
Hormone:-
One of many types of circulating chemical signals in all multicellular organisms that are formed in specialized cells, travel in body fluids, and coordinate the various part of the organism by interacting with target cell.



Enzymes are………which are produced by the cell of living organisms.
a) protein                                             

b) lipid
c) vitamin                                             

d) nucleic acid

a

Enzyme help in improving the quality of products such as………
a) textile                                               

b) detergents
c) food                                                  

d) all of these

d

Vinegar and cheese are also produced due to utilization of enzymes in………and yeast.
a) virus                                                  

b) bacteria
c) yeast                                 

d) fungi

b

The antibodies that help us to fight against disease are large………molecules.
a) carbohydrates                

b) proteins
c) lipids                                 

d) vitamins

b