Biology 9700/43 — May/June 2023
Cambridge A-Level · A Level Structured Questions · worked solutions for every part, with the mark scheme
10
questions
100
marks
120
minutes
Topics Inheritance · Control and Coordination · Energy and Respiration · Selection and Evolution · Genetic Technology · Homeostasis · +2 more
Q19MEnergy and RespirationFree sample
(a)3M
The Krebs cycle was named after the biochemist Sir Hans Krebs, who worked out the sequence in 1937.
Fig. 1.1 is an outline of the Krebs cycle.
Identify substances P–U.
P ______
Q ______
R ______
S ______
T ______
U ______
(b)2M
Describe how ATP is produced from ADP in the Krebs cycle.
(c)4M
Describe and explain the features of ATP that make it suitable as the universal energy currency.
The rest of this paper
9 more questions- Q2Selection and Evolution7M
- Q3Inheritance10M
- Q4Genetic Technology10M
- Q5Inheritance13M
- Q6Homeostasis14M
- Q7Control and Coordination8M
- Q8Photosynthesis12M
- Q9Control and Coordination · Inheritance8M
- Q10Classification, Biodiversity and Conservation9M
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