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THE WORLD OF CELL - CHEMISTRY OF LIVING SYSTEMS 

Chemical abundance of living systems
Bioelements, inorganic substances
 

            1.      Which of the following elements belong to basic bioelements:
                    a)      C, H, O, N, F
                    b)      C, H, O, P, Ca
                    c)      C, H, O, N, P
                    d)      C, H, Cr, F, Co

            2.      Basic bioelements form:
                    a)      90% of organism weight
                    b)      92% of organism weight
                    c)      88% of organism weight
                    d)      98% of organism weight

            3.      How many basic bioelements are known:
                    a)      3
                    b)      4
                    c)      5
                    d)      6

            4.      KWhich of the following elements belong to macroelements:
                    a)      Fe, K, Na, Cu
                    b)      Mg, S, Ca, Cl
                    c)      S, Fe, Mo, P
                    d)      Cl, Ca, Br, Zn
 
            5.      CO₂ and H₂O are:
                    a)      substances for photosynthesis
                    b)      substances for protein synthesis
                    c)      substances for lipid synthesis
                    d)      final products of organic material oxidation

            6.     NH₃:
                    a)      it is a final product of citrate cycle
                    b)      it is one of substances of biosynthesis of nitrosubstances
                    c)      it can be a final product of nitrosubstance metabolism
                    d)      it is one of substance in photosynthesis

            7.     The most abundant inorganic compounds in organism are: 
                    a)      H₂O
                    b)      CO₂
                    c)      NH₃
                    d)      HCl

            8.     Inorganic compounds for organic compounds biosynthesis are:
                    a)      HCl, NH₃, CH₄
                    b)      H₂O₂, CO, NH⁴⁺
                    c)      H₂O, CO₂, NH₃
                    d)      CO₂, H₂O₂, NH₃

            9.     Which of the following compounds are the most abundant in organism:
                    a)      nucleic acid
                    b)      sacharides
                    c)      lipids
                    d)      water

            10.  Which of the following organic compounds are the most abundant in organism:
                    a)      proteins
                    b)      nucleic acids
                    c)      sacharides
                    d)      lipids

            11.     Water as a solvent:
                     a)      solves polar substances
                     b)      solves non - polar substances
                     c)      solves both polar and non - polar substances
                     d)      is non - polar

            12.      Water is important for living systems:
                      a)      as an energy source for chemical reactions
                      b)      as a medium where fat substances are solved
                      c)      as a medium for chemical reactions
                      d)      as a medium where vitamins A, D, E, K are solved

            13.   Microelements are a part of:
                    a)      enzymes
                    b)      lipids
                    c)      makroergical compounds
                    d)      glycogene