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2016 WJEC A2-Level Biology, BY5

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Original post by triphazards
definitely failed. For the 2nd time fml


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haha insure you did fine, i resat aswell, but i took a gap year instead of a third year im college, would you say it was harder than by4?
How do you get an A* overall? Is it 90 UMS across all A2 units, or do you need 90+ in each A2 unit?
Original post by hprynne
How do you get an A* overall? Is it 90 UMS across all A2 units, or do you need 90+ in each A2 unit?


across all your units 270/300 UMS
Each exam (4 & 5) is 120 UMS each and coursework is 60
For the spermatogenesis/oogenesis essay, do people think they accept labeled diagrams for the processes?
Original post by csdjfjlkbfdjlk
For the spermatogenesis/oogenesis essay, do people think they accept labeled diagrams for the processes?


I would think so yeah.
Is there an unofficial mark scheme going around for either by4 or by5?
Original post by wobobobob
Is there an unofficial mark scheme going around for either by4 or by5?


who wants to collab to make a mark scheme ?
Original post by kevin_muendo
who wants to collab to make a mark scheme ?


I can't even remember the Qs 😂 Let alone any answers!
Original post by Squirrel246
I can't even remember the Qs 😂 Let alone any answers!


Collab by5 exam questions
i will update, please correct any mistakes, and add any you remember

Question titles
1. carbon fuels and sustainability 2. cellular reproduction 3. inheritance 4.energy flow 5.ebola 6. 10 marker on spermatogenesis

question 1.
what is the definition of monocrop
definition of biodiversity
what is the definition of carbon footprint
how does monocrop effect biodiversity
how transporting bananas by boat will affect a companies carbon footprint

question 2 cyanide
which clover gene will be passed on
di-hybrid cross
ratio for the different phenotypes
chi-squared test
cross the correct significants level
do you accept the null hypothesis
how will cows grazing make a new species of clover

question 3 cellular reproduction
what is the diploid number of chromosomes
put the stages of meiosis in order
name the two stages
state two structural differences
mutation ? (stop codon something)
name the type of mutation
label the the new gene sequence
why cant this make the protein

question 4 energy flow in a ecosystem
label the correct number in the energy flow diagram
the percentage of the energy flow for plants
what does this assume of the energy not used
what does this group (decomposers) do with the energy
what would be the difference on a woodland floor
how would they grow differently in more acidic conditions (peat bog)

question 5 ebola
how can the ebola virus not need the nucleus to produce protein
cant remember much about ebola
ethical implications of doctors giving the vaccine except being tested
(some questions of vectors which i cant fully remember)
what organelle is affected by a virus
what enzyme is used to create the RNA
which is the vector
which is the vector for the bacteria
why is this vector better
what is the final modifier of a protein

question 6 10 marker on spermatogenesis
A in the testes
B in the seminiferous tubules
C to produce haploid cells
D spermatogonium mature to make P spermatocyte
E meosis 1 to make secondary spermatocyte
F meosis 2 to make spermatids
G differentiate to make spermatozoa
H sertoli cells
Difference with oogonia
-3 polar bodies
-starts at puberty/starts at birth
-follicle cells/ sertoli cells
-limited number/millions
-stops at menopause/ never stops
(edited 7 years ago)

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