Qcm Biochimie 1ere Annee Medecine Exclusive [ PLUS ]

This report focuses on the "exclusive" core curriculum found in most medical faculties (France, North Africa, Canada, etc.). It is organized by major modules and includes Multiple Choice Questions (QCM) with detailed answer keys.

QCM 6: Glycolysis

Question: Regarding glycolysis: A. It occurs in the mitochondria. B. It produces a net gain of 2 ATP and 2 NADH per glucose molecule. C. The rate-limiting enzyme is Phosphofructokinase-1 (PFK-1). D. Pyruvate kinase catalyzes the final step, producing pyruvate and ATP. E. Glycolysis requires oxygen.

Answer Key:

A. False. It occurs in the cytosol.
B. True. (Consumes 2 ATP, produces 4 ATP, net 2 ATP; and produces 2 NADH).
C. True. PFK-1 is the main control point (committed step).
D. True. Substrate-level phosphorylation.
E. False. Glycolysis is anaerobic.

2. L'Analyse des Items "Vrais"

Parfois, un item est faux à cause d'un seul détail (un chiffre, une enzyme), mais le reste de la phrase est pertinent. qcm biochimie 1ere annee medecine exclusive

Exemple : "L'insuline est une hormone hyperglycémiante."
Action : Notez dans vos fiches : "Insuline = hypoglycémiante". Utilisez l'erreur du QCM pour corriger votre propre cours.

Section 3: Bioenergetics & Oxidative Phosphorylation (Q13–18)

Q13. The complete oxidation of one molecule of glucose yields approximately how many ATP equivalents in human cells?
A) 12–15
B) 20–25
C) 30–32
D) 36–38
E) 40–45

Q14. Which complex in the electron transport chain does not pump protons?
A) Complex I (NADH dehydrogenase)
B) Complex II (Succinate dehydrogenase)
C) Complex III (Cytochrome bc1 complex)
D) Complex IV (Cytochrome c oxidase)
E) ATP synthase

Q15. Uncoupling proteins (UCP1) in brown adipose tissue:
A) Increase ATP synthesis
B) Generate heat by dissipating the proton gradient
C) Inhibit fatty acid oxidation
D) Require ADP to function
E) Block electron flow through complex III This report focuses on the "exclusive" core curriculum

Q16. (True/False) Rotenone inhibits electron transfer from Complex I to CoQ.

A) True
B) False

Q17. The primary purpose of the citric acid cycle is to:
A) Produce glucose from pyruvate
B) Generate high-energy electron carriers (NADH, FADH2)
C) Synthesize ketone bodies
D) Store fat
E) Directly produce most ATP

Q18. Which coenzyme is required for the pyruvate dehydrogenase complex?
A) Biotin
B) Thiamine pyrophosphate (TPP)
C) Coenzyme A only
D) Tetrahydrofolate
E) S-adenosylmethionine QCM 6: Glycolysis Question: Regarding glycolysis: A

Report: QCM Biochimie – 1ère Année Médecine

Subject: Core Biochemistry Fundamentals Target: 1st Year Medical Students (PCEM1) Format: QCM Type "K" (Multiple True/False) or Single Best Answer, categorized by module.

4. Lipides et membranes (Niveau : Expert)

Un bon QCM exclusif mélange biochimie et physiopathologie.

Le cholestérol est un stéroïde.
Il augmente la fluidité membranaire à basse température. (Vrai, c'est un "buffer de fluidité").

QCM 8: Cycle Properties

Question: A. The Krebs cycle takes place in the mitochondrial matrix. B. Acetyl-CoA enters the cycle and condenses with Oxaloacetate to form Citrate. C. One turn of the cycle produces 3 NADH, 1 $FADH_2$, and 1 GTP. D. $CO_2$ is produced during the cycle. E. The cycle is anabolic only.

Answer Key:

A. True.
B. True. Catalyzed by Citrate Synthase.
C. True. (3 NADH + 1 $FADH_2$ + 1 GTP/ATP).
D. True. Two molecules of $CO_2$ are released per turn.
E. False. It is amphibolic (both catabolic and anabolic, providing precursors for synthesis).