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Cambridge AS & A Level Biology 9700 — Revision Notes

1 · Cell Structure

0/26

2 · Biological Molecules

0/51

3 · Enzymes

0/29

4 · Cell Membranes and Transport

0/41

5 · The Mitotic Cell Cycle

0/21

6 · Nucleic Acids and Protein Synthesis

0/22

7 · Transport in Plants

0/28

8 · Transport in Mammals

0/39

9 · Gas Exchange

0/13

10-11 · Infectious Disease and Immunity

0/43

12 · Energy and Respiration

0/37

13 · Photosynthesis

0/23

14-15 · Homeostasis and Control

0/57

16 · Inherited Change

0/34

17-18 · Selection, Evolution, Classification and Conservation

0/69

19 · Genetic Technology

0/44
Quiz

12.2.5 Aerobic Respiration- The Krebs Cycle – Exam questions

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  • Questions count: 12
  • Passing grade: B+
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1.
In the sequence covered in this lesson, which step comes immediately after Krebs cycle?
In the sequence covered in this lesson, which step comes immediately after Krebs cycle?
Pyruvate
Glycolysis
ETC
NADH/FADH₂
2.
In the sequence covered in this lesson, which step comes immediately after Krebs cycle (CO₂)?
In the sequence covered in this lesson, which step comes immediately after Krebs cycle (CO₂)?
Glucose
~34 ATP + H₂O
Glycolysis (2 ATP)
ETC
3.
Without oxygen, the Krebs cycle keeps running normally. True or false?
True
True in muscle
False
True for a few hours
4.

The Krebs cycle takes place in the

cytoplasm
cristae
outer mitochondrial membrane
mitochondrial matrix
5.

In the Krebs cycle, acetyl CoA combines with

oxaloacetate (4C) to form citrate (6C)
pyruvate to form citrate
citrate to form oxaloacetate
NAD to form reduced NAD
6.

The Krebs cycle produces, per turn,

oxygen
CO₂, ATP, reduced NAD and reduced FAD
glucose
lactate
7.
Which statement best describes Krebs cycle?
Cycle in the mitochondrial matrix that fully oxidises pyruvate, releasing CO2 and loading electron carriers.
Electron carriers — they ferry high-energy electrons to the transport chain.
The extra oxygen needed afterwards to clear lactic acid built up during hard exercise.
Splitting glucose into two pyruvate molecules in the cytoplasm; net gain 2 ATP.
8.
According to the comparison table in this lesson, what is the Input of Krebs cycle?
According to the comparison table in this lesson, what is the Input of Krebs cycle?
Stages of cellular respiration
2 pyruvate
2 acetyl-CoA
Glucose
NADH, FADH₂, O₂
9.

The link reaction and Krebs cycle take place in the

cytoplasm
inner membrane
mitochondrial matrix
intermembrane space
10.
How many turns of the Krebs cycle occur per glucose molecule?
1
2
3
6
11.
Which molecule combines with the acetyl group at the start of the Krebs cycle?
Oxaloacetate
Citrate
Pyruvate
Coenzyme A
12.
This reaction occurs in the matrix of the mitochondria and includes FADH2 among its products.
This reaction occurs in the matrix of the mitochondria and includes FADH2 among its products.
Glycolysis
Krebs cycle
Oxidative phosphorylation
Lactic acid fermentation
Chemiosmosis
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Part of 12 · Energy and Respiration — see every lesson and quiz in this unit.
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