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AQA Triple Science GCSE Biology - Paper 1 - 14th May 2019 Unofficial Markscheme

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Reply 360

Mina11

Original post by Mxro30

What did everyone get for the enzyme A or B question for the pancreatic cancer

I stared at that question for like 10 minutes

Reply 361

amzyyxx

1- i got nucleus contains the genetic info
2- i got bacterial cell
3- i labelled cell membrane and nucleus
4- cell wall was the difference
5- carbon dioxide plus water makes glucose plus oxygen
6- i think i did the power output was the independent
carry the markscheme on i guess

Reply 362

alice_226

i think the only correct answers were diabetes and paralysis because cystic fibrosis is a genetic disorder x the others have some element of environmental factors

Original post by capnoah

Would cystic fibrosis be a correct answer for a type of disease stem cells would cure??

Reply 363

Kalhorious

they probably wrote that the pancreas can't produce the correct enzymes such as protease, amylase etc. Therefore no nutrients are absorbed by the bloodstream in the small intestine which are needed for cell growth. Therefore weight loss occurs, more cells dying than cells being created.

Original post by motivatedmadman

@Jacobroseve @ZakGoulders what did you guys say for the diabetes causing weight loss

Reply 364

Butterson2003

Original post by Char2109

some of my maths ones were 400 for the microscope one, 3.3, 91 and 10.4

I don't think it was 91 as it asked you to calculate for 2017 but the values only went up to 2015. So you had to minus twice. But it was only 1 mark so you will be fine.

Reply 365

shxnnxn23

Original post by chriswillis29

By using the graph you could find out in 30 minutes the rate was 5.2. By multiplying 5.2 by 2 you could find the rate for an hour and then change it to 2 significant figures. The answer was 10.

Oh okay, I just got the change in y wrong

Reply 366

amzyyxx

i put bacterial cell would that still count

Original post by mongotardy11

guys for the 1 marker near the start its prokaryotic cells. you cant say blood cell for example

Reply 367

alice_226

i do do gcse pe though lmao

Original post by ZippyDoodah

Haha no it’s in the spec 😂

Reply 368

shxnnxn23

Original post by xxlailamalikxx

0 isnt a significant figure

It is if the zero is after a number that isn’t zero

Reply 369

Laurenod45

0 isn’t counted as a significant figure

Original post by Shadowkillz98410

The q said to 2 sf for the 10.4 one mate

Reply 370

ashallen12345

for the one about why did the plants lose more water i put : humidity may change, temperature may change: rather than may increase for both will i still get the marks

Reply 371

chriswillis29

Do you need to mention heating up Benedict's solution?

Original post by Kalhorious

yep

Reply 372

ursulahall

i put to place the beaker with pondweed in a water bath and to add a solution containing CO2 into the beaker as well but idk

Original post by Shadowkillz98410

For how to make the photo synthesis one more valid I put use Gad syringe matead and get someone else to repeat the experiment and check if results are similar. Is this right

Reply 373

alice_226

they wanted the general type of cell (eukaryotic or prokaryotic) not a type of organism

Original post by amzyyxx

i put bacterial cell would that still count

Reply 374

Gunch

Original post by shxnnxn23

Oh okay, I just got the change in y wrong

i put 10.4 smh

Reply 375

Amylouies16

Noooo ive messed up stupidly did 5.2/2

Original post by Isabella912

It was the gradient of the line between 2.5 and 3. Change in y was 5.2 and the change in x was 0.5. 5.2/0.5 = 10.4 = 10(2.sf)

Reply 376

arxo

I put red blood cell, i think that right

Original post by amzyyxx

i put bacterial cell would that still count

Reply 377

youv

i wrote that the monoclonal antibodies attach to the antigens on the cancer cells, this blocks growth hormones from binding onto the cell which stop it from dividing uncontrollably

Original post by emaan_happy

Why would you need the radioactive thing they said the monoclonal Antibody treats the cancer

Reply 378

Johnobrien123

Original post by JaiBurnett

what was the diabetes/ water body cell answer ??

Osmosis because the water would move out of the cell if the blood had lower concentration of water, from high to low concentration

Reply 379

username4072636

I think I messed that one up somehow...

Original post by chriswillis29

By using the graph you could find out in 30 minutes the rate was 5.2. By multiplying 5.2 by 2 you could find the rate for an hour and then change it to 2 significant figures. The answer was 10.