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

9 confirmed

i got -0.2mm in the magnification question and said that the carbohydrase is made in the ass, the nucleas makes co2 right ???, am i wright

btw that test was so easy, i think i only lost like 2 marks on stupid mistakes

Reply 801

Give_me_the_teá

3

Original post by snepspell

i got 400x magnification,
91 (malaria question)
1.85 (im scared i was too precise with this)
and everyone keeps saying they got 10.4 or 10 for rate, i got 9.2 or something. i definitely did something wrong, but was i wrong in working out the gradient for rate?

I got 10 because it asked for 2 s.f so I rounded the 10.4 that I got to 10

Reply 802

L.polly

1

for the leaking valves one? i wrote about how oxygenated blood mixes with deoxygenated blood so that means less O2 for the muscles so less energy released from aerobic respiration which makes exercise more difficult

Original post by Abbasali123

Could the condition have been soemthing else like faulty blood cells

Original post by karmunlau

bacterial cells dont have a nucleus, its one of the main differences like the strand of DNA doesnt count in any way as a nucleus?

Original post by Claydo66

The one about exercise did anyone else write about anaerobic respiration and lactic acid?

Reply 803

x49map-03k

9

Original post by TheCapstan

its do with osmosis, nothing to do with energy

What?? How?

Reply 804

keeno25

17

monoclonal antibodies carry drugs into the body that destroy the cancer cells. Also they block receptors on cancer cells to stop them from dividing

Reply 805

THEINDIANBATMAN

13

you know for the magnification one, how is everyone getting the distance between x and y to be 2.4 when I measured it like twice and got 2.9

(edited 4 years ago)

Reply 806

libbymaekay

1

Original post by Aimee.xo

Was the line of best fit meant to be straight or curved?

I think it was meant to be straight but I couldn't fit it ?? so I ended up doing a curve

Reply 807

Costaaa

5

Original post by SIH03

what you guys get for the
"carbohydrases are made in pancreas- where else is carbohydrase made"?

Mouth+small intestine

Reply 808

amyylouise14

1

in science it can be a curve, i did a curve anyway ://

Original post by libbymaekay

I think it was meant to be straight but I couldn't fit it ?? so I ended up doing a curve

Reply 809

TheCapstan

13

it's curved

Original post by libbymaekay

I think it was meant to be straight but I couldn't fit it ?? so I ended up doing a curve

Reply 810

Totototototo

2

Going on what you said you lost around 7 marks so i wouldnt say your doomed a 9 is probably going to be around 75 this year so unless you really think you ****ed it you should be fine mate

Original post by BooperDooper1202

I walked out of the exam feeling pretty confident but know I've realized that I'm doomed. Put x40 for the magnification question. 10.4 for the rate question without rounding it. Nothing about stem cells or paralysis for the regenerative cells. I didn't put anything about stem cells attaching to toxins or whatever with cancer cells. I want to take biology at a-levels but now idk if I'll get that grade 6 I need. I'm gonna go off into a corner and cry now.

Reply 811

Abbasali123

3

what did u put for the condition which can be treated from regenerative cells

Original post by L.polly

for the leaking valves one? i wrote about how oxygenated blood mixes with deoxygenated blood so that means less O2 for the muscles so less energy released from aerobic respiration which makes exercise more difficult

Reply 812

hellogcse

3

yayyy i wrote thatt

Original post by ZippyDoodah

Less enzymes produced,
So less food digested,
so less proteins and glucose absorbed into blood,
so less glucose for energy, and less protein for growth and repair.

Reply 813

jeriu

13

Original post by UnknownZedd

9 confirmed

well thank u, i feel so confident right now, but don't jinx it now :redface:

, also was do u think of axletol q

Reply 814

ExourisRai

3

Original post by Char2109

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

Meant to be 10 becuz 2.s.f

Reply 815

TheCapstan

13

it's 2.4 not 3.4

Original post by THEINDIANBATMAN

you know for the magnification one, how is everyone getting the distance between x and y to be 3.4 when I measured it like twice and got 3.9

Reply 816

Claydo66

20

Original post by L.polly

for the leaking valves one? i wrote about how oxygenated blood mixes with deoxygenated blood so that means less O2 for the muscles so less energy released from aerobic respiration which makes exercise more difficult

I put how the rate of blood flow would be reduced which now I see is wrong but went into the same reasoning about lack of O2