Question

     Which of the following IS a complex macromolecule?

                    (a) Glycoprotein

                    (b) Phospholipid

                    (c) Triglyceride

                    (d) A and B

                    (e) A and C

                    (f) None of the above

     The prokaryotic transport system that harnesses the proton motor force is

                    (a) Diffusion

                    (b) Simple transport

                    (c) Group translocation

                    (d) ABC transport system

      Which of the following would be used by a chemolithoautotroph for energy?

                    (a) C2H3O2-

                    (b) H2

                    (c) H+

                    (d) C3H8

Answer 1

ANSWER :

1. Glycoproteins and phospholipids are two complex macromolecules that consists carbohydrate & proteins, and phosphorus & lipids respectively. These are main components of biomembranes (cell membrane) in almost all organisms. Hence option (d) is the correct answer.

2. The ABC (ATP binding cassette) transport system found mainly in cell membrane of eubacteria and archaea, where the transport of substances performed via using ATP as active transport system. Hence option (d) is the correct answer.

3. Chemolithotrophs are some specific microorganisms (bacteria) that oxidize inorganic substances like H2, Sulphur & iron compounds to obtain electron for production of energy in their electron transport system (ETS). Hence option (b) is the correct answer.