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94' SBIOA Exam


93 Exam 
Part A: M/C
Part B: Short Answers
Part C: Essay Question

94 Exam 
Part A: M/C
Part B: Essay Questions

95 Exam 
Part A: M/C
Part B:
Part C:
Part D:

97 Exam 
Part A: M/C
Part B:
Part C:
Part D:




Part A: Multiple Choices

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11.     The synthesis of carbohydrates, fats, and proteins from smaller units involves the


            a.         temporary bonding to DNA.

            b.         removal of nitrogen.

            c.         *correct*removal of water.

            d.         addition of water.

            e.         production of ATP.


12.        The great diversity of structure in proteins is mainly due to


            a.         *correct*different numbers, kinds, and sequences of amino acids.

            b.         different kinds of bonds between successive amino acids.

            c.         the action of the ribosomes.

            d.         the precise location of specific amino acids, common to all proteins. 

            e.         the disulphide and hydrogen bonds which determine molecular shape.


13.        In using the analogy of a key and a lock to explain enzyme action,


            I.          the key is analogous to the enzyme and the lock to the substrate.

            II.         the key is analogous to the substrate and the lock to the enzyme.

            III.       the stem of the key is analogous to the protein part of an enzyme.

            IV.       the stem of the key is analogous to the non‑protein part of the enzyme.

            V.        a key which will open only one lock is analogous to an enzyme which has a high degree of specificity.


            Which of the above statements are correct?


            a.         II, III, and V

            b.         I and III only

            c.         I, IV, and V

            d.         II and IV only

            e.         *correct* I, III, and V


14.    All but one of the following are functions of proteins within a cell.  Which one is NOT a function of proteins?


            a.         switching genes on and off

            b.         providing structure

            c.         *correct* controlling osmosis

            d.          catalyzing chemical change

            e.         facilitating active transport


15.        Which of the following is NOT true about enzymes?


            a.         They function best at specific temperatures but break down at high temperatures.

            b.         Some enzymes require activators.

            c.         They are essential to the metabolism of cells for the conversion of energy.

            d.         They function best at a particular pH.

            e.         *correct*They undergo a major chemical change after reacting with their specific substrate.


16.    Many individuals of the same species living together in a defined area form a/an


            a.         community.

            b.         genus. 

            c.         *coorect*population.

            d.         ecosystem.

            e.         variety.


17.     When two different species overlap in the same biological niche, they are


            a.         unaffected by one another.

            b.         dependent on one another.

            c.         in co‑operation with one another.

            d.         *correct*in competition with one another.

            e.         dependent on different food supplies.


18.    The progressive series of changes that eventually produce a climax community on what was once a bare rocky island is an example of


            a.         speciation.

            b.         *correct*primary succession.

            c.         secondary succession.

            d.         evolution.

            e.         eutrophication.


19.     The sequence of energy flow through a food chain is


            a.         primary consumers‑ producers‑ higher order consumers.

            b.         higher order consumers‑ primary consumers‑ producers.

            c.         primary consumers‑ higher order consumers‑ producers.

            d.         producers‑ higher order consumers‑ primary consumers.

            e.         *correct*producers‑ primary consumers‑ higher order consumers.


20.    In a terrestrial ecosystem, the trophic level that would contain the largest biomass would be the


            a.         *correct*producers.

            b.         highest order consumers.

            c.         primary consumers.

            d.         secondary consumers.

            e.            decomposers.


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