B5 Struggles Flashcards
1
Q
What is the name of the zone created by antibiotics in the required practical? (1)
A
- zone of inhibition
2
Q
Why is it better to freeze fruit that could rot rater than keeping it on the side in the kitchen? (2)
A
- lower temperatures slow down the enzyme controlled reaction
- room temperature is closer to the optimum temperature best for enzymes
3
Q
How do you work out the division of bacteria? (1)
A
- 2 (to the power of number eg. 24 times in a day)
4
Q
Why is heating fruit at 100c bad? (2)
A
- denatures enzymes
- becomes mush
5
Q
Ways to prevent spread of HIV/AIDS [not contraception] (2)
A
- not sharing needles to stop blood transfer
- reduce sexual partners to decrease chance of spread
6
Q
Plant diseases (3)
A
- rose black spot
- tobacco mosaic
- mineral deficiency
7
Q
Ways to reduce disease transfer in crops [not pesticides of stem cell treatment] (2)
A
- field hygiene
- plants spread apart
