1. Biotechnology (b) Waste SQA Questions

2. What you should know 1.When untreated s_______ is added to rivers bacteria f____ on and breakdown the sewage using up the ______. Fish and other animals ___ due to l___ of oxygen 2.U_______ sewage can spread c______, t______ and d_________ 3.Sewage treatment includes its breakdown by d_____ microbes to products which are h__________ to the e___________. 4.C__________ breakdown of sewage is only possible in a_________ conditions as anaerobic respiration is much less e________ and only p________ digests the sewage. ewage eed oxygen dieack ntreated holera yphoidysentery ecay armlessnvironment omplete erobic fficient artially

3. 5.Sewage contains many t_____ of waste so a r_____ of microbes is needed to break it down c________ 6.During sewage treatment oxygen is provided by either t_______ the sewage over f_______ beds or bubbling c_________ air through the sewage 7.Microbes can improve (u_______) waste into useful products such as p_______ food from microbes grown on waste s_____ and m______ (biogas) from domestic waste dumps. Industry can make m_______ from this upgraded waste ypes ange ompletely rickling ilter ompressed pgrade rotein ugarethane oney

4. water typhoidcholeradysentery

5. Microbes get energy aerobic Range of microbes used

6. 8.Microbes can take l___ g_____ waste with little e______ or p______ and convert it to high grade material with h___ energy and/or high p_______ 9.A______ and m______ are products of fermentation 10.Fermentation fuel is r________ whereas f_____ fuels are non renewable 11.Under s______ conditions, microbes can reproduce very rapidly by a_______ means 12.Microbes may be h_______ to provide p_____ rich f____ for animals or h_______ owrade nergy protein igh rotein lcohol ethane enewable ossil uitable sexual arvestedrotein oodumans

7. 13.When working with b________ in the lab you must use s_______ techniques to k__ microbes or p_______ c___________ e.g. washing surfaces with d___________ and h________ to a very high t___________ 14.Bacteria can produce r__________ spores which can o_______ be killed by s______ cleaning at ____ °C 15.Microbes breakdown o______ matter to get e_______ and are important in the recycling of c______ and n________ acteria terile illrevent ontamination isinfectanteating emperature esistant nly team125 rganic nergy arbonitrogen

10. Recycling

11. Nitrogen Cycle 1 Nitrates Animal protein Nitrites Nitrogen fixing bacteria Denitrifying bacteria Nitrogen fixing bacteria decay bacteria eats nitrifying bacteria

12. Nitrogen fixing bacteria decay bacteria denitrifying bacteria Nitrogen fixing bacteria Animal protein Nitrites

14. 5 1 3 2 Nitrates Nitrifying bacteria

15. E eating F uptake by roots D nitrogen fixing B denitrification C decay and decomposition

16. Carbon cycle Animal CHO fuels eats RESPIRATION photosynthesis death

17. Plant CHO burning Photosynthesis RESPIRATION eats death

18. photosynthesis respiration Respiration by decay microbes burning eats death Dead bodies Fossil fuels