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microbes exam revise

microbes past exam information

QuestionAnswer
Discuss how fungi receive the nutrients they require to survive and LINK this to the cycling of nutrients in the environment. hyphae grow down into food substrate and secrete enzymes that break up complex (large) molecules into smaller molecules. These can then be reabsorbed by the hyphae. How nutrients are cycled, eg breaks down food substrate into nutrients that can be absorb
explanation of how fungi decompose material extra-cellular digestion! Fungi feed by secreting enzymes into their food.Fungi are Saprophytes they feed and live on dead matter.Fungi need warm and moist conditions to decompose matter.
extra-cellular digestion hyphae grow down into food substrate and secrete enzymes that break up complex (large) molecules into smaller molecules. These can then be reabsorbed by the hyphae. Fungi excrete nutrients that can be used by other organisms.
links to extra cellular digestion and the cycling of nutrients. without decomposition, nutrients would be locked up and not available to other organisms. Fungi excrete nutrients that can be used by other organisms and passed through the food chain.
Discuss the processes involved in the culturing of micro-organisms from a swab of someone’s throat Sterilise item to use to transfer microorganism. Inoculation – microbes from swab are wiped onto agar. Replace lid to reduce risks. Incubate – store in ideal conditions warm and moist. Store plate upside down to keep condensation off agar.
Reasons for sterilisation To ensure no contamination of agar from other microbes occurs.
bacteria feeding extra cellular digestion
bacteria respiration aerobic or anaerobic
bacteria: mode of life parasitic and saphrophytic
bacteria: conditions warm,moist,nutrients
bacteria: movement flagella
bacteria: size larger than viruses, more complex.
bacteria reproduction Bacteria reproduce by binary fission, a form of asexual reproduction that produces two identical daughter cells every 20 minutes
Viruses: structure small, protein coat. reproduce by replication. does not feed but recieves nutrients from host cell.
Created by: YumnaHaskins
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