Exam (elaborations)
2024 AQA A LEVEL BIOLOGY – RESPIRATION EXAM WITH CORRECT ANSWERS
- Module
- Institution
2024 AQA A LEVEL BIOLOGY – RESPIRATION EXAM WITH CORRECT ANSWERS
[Show more]
Seller
Follow
Elitaa
Reviews received
Content preview
2024 AQA A LEVEL BIOLOGY –RESPIRATION EXAM WITH
CORRECT ANSWERS
What is the purpose of respiration ? - CORRECT-ANSWERSTo release energy
from glucose
To produce ATP
What is the general equation for aerobic respiration ? - CORRECT-
ANSWERS6O2 + C6H1206 --> 6H2O + 6CO2 + energy
What do plants need energy for ? (name 5) - CORRECT-ANSWERS1.
Photosynthesis
2. Active transport of minerals via roots
3. DNA replication,
4. Cell division,
5. Protein synthesis
What is the reduced NAD produced in glycolysis used for ? - CORRECT-
ANSWERSOxidative phosphorylation
What is the pyruvate produced in glycolysis used for ? - CORRECT-
ANSWERSActively transported into the mitochondrial matrix
Link reaction
Why does glycolysis take place in the cytoplasm ? - CORRECT-
ANSWERSGlucose can't cross the mitochondrial membrane
It's too big
Describe the process after glycolysis in yeast/plants (2 stages) - CORRECT-
ANSWERS1. Pyruvate loses CO2 to form ethanal
2. Ethanal reduced to ethanol and reduced NAD oxidised to NAD
What is the purpose of anaerobic respiration ? - CORRECT-ANSWERSTo
produce ATP by glycolysis
Oxidises reduced NAD from glycolysis to NAD to allow glycolysis to continue
Describe the process of glycolysis in animal cells / some bacteria - CORRECT-
ANSWERSPyruvate reduced to lactate (lactic acid)
Reduced NAD oxidised to form NAD
, Where does the link reaction occur ? - CORRECT-ANSWERSMatrix of the
mitochondria
What is the purpose of the link reaction ? - CORRECT-ANSWERSTo convert
pyruvate to acetyl coenzyme A
Describe what happens during the link reaction - CORRECT-ANSWERS1.
Pyruvate is decarboxylated to form acetate
2a. Pyruvate is oxidised to acetate
2b. NAD is reduced to reduced NAD
3. Coenzyme A combines with acetate to form acetyl coenzyme A
Where is the acetyl coenzyme A used ? - CORRECT-ANSWERSKrebs Cycle
Where is the reduced NAD used ? - CORRECT-ANSWERSOxidative
phosphorylation
What happens to the CO2 produced in the link reaction ? - CORRECT-
ANSWERSLost as a waste product
What happens in the Krebs Cycle ? - CORRECT-ANSWERSATP and reduced
coenzymes are produced in a series of redox reactions
CO2 is lost as a waste product
Where does the Krebs Cycle take place ? - CORRECT-ANSWERSMatrix of the
mitochondria
Describe what happens in the Krebs Cycle - CORRECT-ANSWERS1. Aceyl CoA
reacts with a 4 carbon compound to form a 6 carbon compound and
coenzyme A
2. The 6 carbon compound forms a 5 carbon compound
3. The 5 carbon compound reforms the 4 carbon compound
What is substrate level phosphorylation ? - CORRECT-ANSWERSWhen a
phosphate group is directly transferred from one molecule to another
e.g. the production of ATP in the Krebs Cycle
What is the CoA produced in the Krebs Cycle used for ? - CORRECT-
ANSWERSThe Link Reaction
What are the reduced enzymes produced in the Krebs Cycle used for ? -
CORRECT-ANSWERSOxidative phosphorylation
What is oxidative phosphorylation ? - CORRECT-ANSWERSThe process where
energy from electrons from reduced coenzymes is used to synthesise ATP
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
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 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 Elitaa. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £11.48. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
67096 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now
Recently viewed by you
