WJEC BIOLOGY BY1 2016 (NEW AS) Thread

What were people's answers for the cell density calculation? I think there were 30,000 cells, they double every 19 hours and you had to calculate the density after four days?

I rushed and got 150000.

24hrs x 4 days = 96hrs
96/19 = 5.05
5 * 30000 = 150000

wbu?

Reply 61

renegadetheorist

Original post by valbrechts

its the biggest ******** ive ever seen in my life. The amount of work ive put into revising the whole syllabus has gone to waste. I LITERALLY understand and memorized the whole unit but still struggled.

Here are some of my answers not in order: (simplified)

Sap Vacuole, Chloroplasts
Metaphase, Cytokinesis
1.5 x10^5 (the density question)
Other parts of the cell absorbed the stain which blocks light
cell wall is inelastic which opposes hydrostatic pressure when cytoplasm expands

PS DID ANYONE ELSE WRITE DOWN ATLEAST 4 OSMOSIS RELATED ANSWERS?

sap vacuole? i thought that but i could see a round shape underneath similar to that of a mitochondria cut on in alternate angle.
Also Its not Cytokinesis.It;s telophase. (look up telophase in google images).
And 1.5? really i had 950000. as 30000 to start with every 19 hours it doubles. So you find out it doubles 5 times in 4 days. (24*4/19) and do 30000*2^5.
Also other parts of the cell absorbed stain? can you explain. i thought the stain was meant for only Genetic material and nucleotide containing stuff. so you could c it in the ribosome etc.
And won't the cytoplasm contract when evaporation of water takes place , in the water the bacteria is living in?
Not saying you are wrong just comparing to what I got.

Reply 62

Manal99

It was endocytosis, thats what the diagram depicted anyway

Original post by valbrechts

I missed that part out by accident but id imagine theyd be called the same things, transcription and translation

Reply 63

renegadetheorist

Original post by valbrechts

I rushed and got 150000.

24hrs x 4 days = 96hrs
96/19 = 5.05
5 * 30000 = 150000

wbu?

sorry mate its not 5*30000. as when it doubles it goes like 3>6>12 not 3>6>9>12. so it would be 2^5*30000

Reply 64

lemonandlime1

12

Original post by valbrechts

I rushed and got 150000.

24hrs x 4 days = 96hrs
96/19 = 5.05
5 * 30000 = 150000

wbu?

I had that, what did you label the organelles in that green thing? I think I wrote vacuole (but may have been nucleus idk) and chloroplast

Reply 65

renegadetheorist

Also did anyone else have biosensors. for the experiment improvement question

Reply 66

renegadetheorist

Yes thats exactly what it is. And also yes its not vacoule and i thought nucleus would be too small therefore put mitochondria.

Reply 67

Iloveclouds

Did anyone take the resit with the old spec?

Reply 68

aledrhys

Original post by Iloveclouds

Did anyone take the resit with the old spec?

Meeee, how did you find it?

Reply 69

Elljp33

6

Anyone doing unit 1 chemistry tomorrow? Think it'll be as bad as this?

Reply 70

lemonandlime1

12

Original post by Elljp33

Anyone doing unit 1 chemistry tomorrow? Think it'll be as bad as this?

I am, have no idea how it will go but I doubt it can go any worse for me

Reply 71

WJEC_corrupt

Honestly never sat an exam that hard in my life. I fully understand it was a new spec but none of the questions asked made sense to what they wanted. There was no question similar to what was in the old spec and I think that was quite unfair.

Reply 72

robinback

OP

1

Original post by WJEC_corrupt

Honestly never sat an exam that hard in my life. I fully understand it was a new spec but none of the questions asked made sense to what they wanted. There was no question similar to what was in the old spec and I think that was quite unfair.

I agree, even the specimen paper they made was nothing like that exam.

Reply 73

robinback

OP

1

Original post by Elljp33

Anyone doing unit 1 chemistry tomorrow? Think it'll be as bad as this?

It'll certainly be tricky, but I don't know if it'll be as bad. They don't have as much freedom to make questions vague like biology. Some questions could be dodgy such as equilibrium in certain conditions (like the fizzy drink question I think). I'm hoping it won't be that bad though.

Reply 74

chemstudent314

10

Original post by aledrhys

Meeee, how did you find it?

me tooo, how did you both find it? I didn't like all the water potentials questions:s and i put leaf as the tissue when its blood, mitosis essay was okay but I feel like i didn't write enough

Reply 75

chemstudent314

10

Original post by Iloveclouds

Did anyone take the resit with the old spec?

mee, how did you find it? Everyone said it was easy but i find it quite hard tbh :s-smilie:

Reply 76

lemonandlime1

12

Original post by robinback

It'll certainly be tricky, but I don't know if it'll be as bad. They don't have as much freedom to make questions vague like biology. Some questions could be dodgy such as equilibrium in certain conditions (like the fizzy drink question I think). I'm hoping it won't be that bad though.

Do you know which paper that question was from the equilibrium one you mentioned?

Reply 77

robinback

OP

1

Original post by lemonandlime1

Do you know which paper that question was from the equilibrium one you mentioned?

Nope, sorry. It is in the WJEC revision guide if you have that. Page 89 Question 2b

Reply 78

clairebear101

11

Original post by Iamjos

You must have done a resit paper then, the old spec

There are 2 papers, one for WJEC and one for WJEC educas, I did the one u did too

Reply 79

AndrewKn0x

5

Original post by Elljp33

Anyone doing unit 1 chemistry tomorrow? Think it'll be as bad as this?

I am! I really hope not! I got a B in the Chem1 specimen paper but of course that is meaningless. I just hope it's not much difficult than the spec. paper but from what I've seen today that's not guaranteed. I don't think it can get any worse than that paper today!

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