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

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Reply 80

GOOOFY

Maginification question?

Reply 81

AestheticEnergy

What about the question that was like 'Explain why the axolotl may die if the water had a low oxygen concentration'?
That was probably the only question I wasn't entirely sure about XD

Reply 82

Elsmok

wha? i had no clue what i was doing just random calculations and spoke about diffusion
EDIT: sorry, i mean no, yes thats exactly what i did xD

Original post by sqrt of 5

that is exactly what you had to write about xD

[post="83182118"]save[/post]

Reply 83

angry ape.30

damn, i put excess glucose means more respiration so more water waste

Original post by maxdymond

Diabetes and water loss question was regarding the osmosis required practical I believe.

Reply 84

captaingiggles

8 maybe. Grade boundaries will be higher

Original post by Rebekah2811

I think I got about 67 marks what grade do you think that’ll be

Reply 85

Sophie_gatenby

Yeah I think I did this

Original post by maxdymond

I swear the magnification one was 4000, had to change cm to mm? 24/0.006?

Reply 86

Aryan3031

you could also say take readings every 10 minutes as opposed to every 20 minutes and use an LED lamp to reduce the effect of temperature on the rate of photosynthesis

Original post by Heyitsemilymay

I put the same

Reply 87

millie.cooper

i put use gas syringe and use a heat screen to stop temperature changing rate

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 88

Tildaoao

What did you put for the one that asked why the capillary tube was narrow?

Reply 89

happy.pirhana

i talked about how you can detect or identify the cancer cells because the monoclonal antibody would bind to the antigens and stuff, and then i sad it releases a dye?? to detect it?? and then you can scan from outside the body to ionise the cancer cells?

im not sure about the dye part, because i was trying to decide between dye or if you'd attach a chemical to the monoclonal that kills the cancer cells

Original post by Erevising45

What did everyone put for the monoclonal antibody question? I think I put something about how antibodies bind to molecules in the blood so they can be detected and destroyed.

Reply 90

Char2109

Yeah that’s what i did

Original post by Aryan3031

monoclonal antibodies are produced from one b-lymphocyte that produces antibodies specific to the cancer cell
this make the monoclonal antibodies also specific to the cancer cell
these then bind to the cancer cell and alert other white blood cells to destroy the cell

Reply 91

Siona-29

I put the gas syringe and put a beaker in between the lamp and pondweed to stop the heat from the lamp effecting the rate of photosynthesis.

Original post by Heyitsemilymay

I put the same

Reply 92

righteo

This chat is stressing me out 😂😂

Reply 93

captaingiggles

Yeah it was already in mm

Original post by angry ape.30

it was 0.06

Reply 94

technodulan

what was the digitalis question about?

Reply 95

shivixxx1111

Original post by Char2109

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

same

Reply 96

natashadavis

This exam was so easy that I was over complicating it :smile:

)))

Reply 97

angry ape.30

what did you put? I said they had less oxygen so less respiration- less energy produced- cannot function

Original post by AestheticEnergy

What about the question that was like 'Explain why the axolotl may die if the water had a low oxygen concentration'?
That was probably the only question I wasn't entirely sure about XD