100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
Previously searched by you
Pearson Edexcel Level 3 GCE Biology A(Salters Nuffield) Advanced PAPER 3: General and Practical Applications in Biology QP JUNE 2024 $12.99
Add to cart
Please check the examination details below before entering your candidate information
Candidate surname Other names
Centre Number Candidate Number
Pearson Edexcel Level 3 GCE
Wednesday 19 June 2024
Paper
Morning (Time: 2 hours)
reference 9BN0/03
🞍 🞍
Biology A (Salters Nuffield)
Advanced
PAPER 3: General and Practical Applications in Biology
You must have: Ruler, HB pencil, scientific calculator and a copy Total Marks
of the scientific article adapted from the New Scientist and the
Brazilian Journal of Medical and Biological Research (enclosed)
Pearson Edexcel Level 3 GCE Biology A(Salters Nuffield) Advanced PAPER 3: General and Practical Applications
in Biology QP JUNE 2024
Instructions
•• Use black ink or ball-point pen.
Fill in the boxes at the top of this page with your name,
centre number and candidate number.
• Answer all questions.
•• Show all your working out in calculations and include units where appropriate.Answer the
questions in the spaces provided
– there may be more space than you need.
Information
• The
• – usemarks
total mark for this paper is 100.
The for each question are shown in brackets
• answer logically,
this as a guide as to how much time to spend on each question.
In questions marked with an asterisk (*), marks will be awarded for your ability to structure your
showing how the points that you make are related orfollow on from each other
where appropriate.
Advice
• Read
•• Try
each question carefully before you start to answer it.
to answer every question.
Check your answers if you have time at the end.
Turn over
DO NOT WRITE IN THIS AREA
1 One of the first plant species to colonise some habitats is thale cress
(Arabidopsis thaliana).
The plant hormone IAA (auxin) is produced in the growing tips of plants such asthale cress.
DO NOT WRITE IN THIS AREA
(Source: Nigel Cattlin / Alamy Stock Photo)
(a) State what is meant by the term colonisation of a habitat.
(1)
(c) Another role of IAA is to stimulate the growth of lateral roots.The
diagram shows the roots of thale cress.
lateral roots
DO NOT WRITE IN THIS AREA
main root
3
🞍🞍🞍🞍 Turn over
, One type of receptor for IAA is coded for by the tir1 gene.
Scientists have investigated the effect of IAA on the growth of lateral roots inthale cress.
DO NOT WRITE IN THIS AREA
Plants homozygous for a normal tir1 gene and plants homozygous for a mutationin the
tir1 gene were used in this investigation.
The plants were treated with different concentrations of IAA.
The mean number of lateral roots produced per mm of main root was recorded.The graph
shows the results of this investigation.
Key
1.6 Thale cress
1.4 homozygous for:
1.2 normal
Mean number of 1.0 tir1 gene
DO NOT WRITE IN THIS AREA
lateral roots per mm
0.8 mutant
tir1 gene
0.6
0.4
0.2
0.0 0.00 0.01 0.10 1.00
IAA concentration / μmol dm–3
(i) Explain why the scientists used plants homozygous for the normal and themutant
tir1 gene in this investigation.
(2)
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller papersbybree. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.99. You're not tied to anything after your purchase.
