One exam questions - bacterias

This is from June 1997, I don't have the mark scheme for it so I decided to ask you cool people what do you think the answer is. :smile:

Give three environmental factors which could influence the growth of microorganisms.

Explain the effects of each. One example is given for you.

Factor: Oxygen
Explanation: This is required for use in respiration to provide energy for growth.

(3) marks.

Sezkin XxX

Reply 1

MadNatSci

12

There are a huge range of possible answers to this one, so I doubt the mark scheme would be particularly precise about what they're after. Just something that makes sense.

How about you throw some suggestions at me and I'll help you with them, rather than me just giving you some answers, since that won't help you very much in the long run. I don't believe you can't think of anything! -think about it: where do bacteria grow?

Reply 2

Sezkin

OP

11

MadNatSci

There are a huge range of possible answers to this one, so I doubt the mark scheme would be particularly precise about what they're after. Just something that makes sense.

How about you throw some suggestions at me and I'll help you with them, rather than me just giving you some answers, since that won't help you very much in the long run. I don't believe you can't think of anything! -think about it: where do bacteria grow?

I've already wrote the answers, but wanted to see what other people think.

1) Bacterias need nutrients such as Nitrogen, Hydrogen, Carbon..etc

Explanation: For growth , energy or for the ribosomes (protein synthesis).

2) Water

Explanation: For respiration.

Reply 3

Iscariot

11

x) Temperature

Reason: Bacteria like all other organisms can only survive at certain temperatures.

However worth pointing out that those temperatures far more diverse than most organisms. Go extremophiles!

Reply 4

Comp_Genius

4

quorum sensing? too many bacteria in a particular niche will result in a decrease in growth of the individual bacterial cells - modulation of the system as a whole.

One exam questions - bacterias

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