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AQA A-level Biology Unit 1 26th May 2016

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Reply 40
Avatar for srkd
srkd
1
SPECIMEN PAPER
QP: http://www.tomred.org/uploads/7/7/8/3/778329/bio_u1_qp_specimen.pdf
MS: http://www.tomred.org/uploads/7/7/8/3/778329/bio_u1_ms_specimen.pdf
Reply 41
Avatar for Afaq_-
Afaq_-
I feel like the 5 starch digestion and the role of active transport in absorption.


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Original post by Afaq_-
I feel like the 5 starch digestion and the role of active transport in absorption.


Posted from TSR Mobile


Yeah maybe starch digestion has never come up as a 5 marker before, But i think Asthma could come up too because it came up once and a lot of people struggled on it according to the examiners report
From what I can remember of last year's paper, there was literally nothing on the hearts and lungs topics :frown: I bloody well hope they include those this year.
Reply 44
Avatar for srkd
srkd
1
Original post by november321
Yeah maybe starch digestion has never come up as a 5 marker before, But i think Asthma could come up too because it came up once and a lot of people struggled on it according to the examiners report


Asthma has not come up as a five marker before... (?) Which year & month did you see it in?
Also Starch Digestion has come up in June 2009, jsyk.
I would be thrilled if they gave us another one of those : 'The cardiac cycle is controlled by the SAN and the AVN. Describe how'

But I doubt they will seeing as it has come up a few times :frown:
good luck everyone we can do this!
Not long left 🙏
Hoping it isn't full of data questions like last years...
Original post by srkd


Thank you!!
Reply 49
Avatar for gcsekid
gcsekid
2
Original post by afaq_-
i feel like the 5 starch digestion and the role of active transport in absorption.


posted from tsr mobile


sam pam meg
Reply 50
Avatar for Anam
Anam
11
What on earth would you right for the active transport one?
Use of carrier proteins against concentration gradient- Molecule binds, confirmation change, energy from ATP (to ADP + Pi) etc
Na/K pump to move Na into blood, lower conc in epithelial cells so gradient- makes use of co-transport for glucose
Exocytosis of lysosomes/vesicles containing digestive enzyme to produce smaller molecules that can be absorbed
Can't really think of any others
Reply 52
Avatar for shhh123
shhh123
1
GOODLUCK EVERYONE ! ,

Collab on answers after the exam
Magnification what was it?!?!
Reply 54
Avatar for SVOTM
SVOTM
3
was so fricken hard!!!!!!! how did everyone find it?
2.8 micro meters for the actual length
Anyone got an unofficial mark scheme


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What did people put for the 4th question about trypsin

for a) I put ribosomes

for c) I put Peptide bond breaks
The ph decreased because triglycerides are hydorlysed froming an acidic solution?

The ph reamined at 2 because the enzyme is the limiting factor so all active sites are occupied so less trigelyceride is hydolysed?
For the Fev one about suggest 2 things which would reduce FEv.

I put reduced elasticity of the alvieloi

Less surface area because of scar tissue/alevloi broken down.

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