topic 4 and practicals

Question 1

Compare and contrast witherings drug trial with typical ones

Answer 1

both trails used different dosages to find healthy dosage

withering didnt use healthy voulenteers or do preclinical trails on a cellilar level

Question 2

what are the suitable conditions for a seed bank

Answer 2

cold and dry

Question 3

what is the benifit for drying seeds before storage

Answer 3

extends storage time for seeds as drying prevents germination

Question 4

what type of glucose are cell walls made of

Answer 4

beta glucose

Question 5

whats the role of the middle lamalea after mitosis

Answer 5

produced between adjacent new cells because the middle lamella holds cell walls together

Question 6

what is an allele

Answer 6

an alternative form of a gene

Question 7

what is an anatomical adaptation

Answer 7

a visible phisical adaptation that aids survival

Question 8

what is a phisiological adaptation

Answer 8

adaptations of the inerworkings of an organism that aid survival

Question 9

what is agar heated at and why

Answer 9

25oc because 37 oc can produce harmful bacteria

Question 10

what are the elements of seive tube elements

Answer 10

hemicelulose microfibrills and pectin

Question 11

why dont seive tube elements have any rough endoplasmic recticulum or ribosome

Answer 11

there is no transcription

proteins wont need to be folded and proceced in the Rough endoplasmic recticulum

Question 12

how are nitrate ions moved transported from the root to the leaves

Answer 12

through xylemm vessels

in water solution

Question 13

explain the effects of shortage of magnesium ions on a plant

Answer 13

a shortage of magnesium limits the production of chlorophyll

lack of glucose due to lack of photosynthesis

plants may be yellow and small

Question 14

which aseptic techniques can be used when working with bacteria

Answer 14

working in updraft of bunsen burner flame

boiling culture medium before use

flaming instruments

Question 15

why can bacteria grow rapidly in skin wounds

Answer 15

temprature is warm increasing the rate of reactions in bacteria

availability of energy from the tissue

availability of water for bacterial cell functions

oxygen availability is good so aerobic respiration can happen

Question 16

how do you calculate tensile strength

Answer 16

Tensile strength= Maximum force (N)/ cross sectional area thow
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