
Cellular Respiration and Metabolic Pathways Worksheet
Authored by Nathalia Correa Graiczik
Biology
University
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37 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In which cellular compartment does glycolysis occur?
Mitochondria
Cytoplasm
Nucleus
Mitochondrial matrix
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the main function of NAD+ during glycolysis?
Transport electrons directly to the respiratory chain
Act as a cofactor for the enzyme hexokinase
Oxidize pyruvate to acetyl-CoA
Accept electrons during the oxidation of glyceraldehyde-3-phosphate
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How many ATP molecules are consumed and how many are produced during glycolysis? What is the net ATP gain?
2 consumed, 4 produced, net +2 ATP
1 consumed, 3 produced, net +2 ATP
0 consumed, 2 produced, net +2 ATP
2 consumed, 2 produced, net 0 ATP
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following enzymes is a key regulatory enzyme of glycolysis and is inhibited by high levels of ATP?
Hexokinase
Glyceraldehyde-3-phosphate dehydrogenase
Pyruvate kinase
Phosphofructokinase-1 (PFK-1)
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual é o destino do piruvato produzido na glicólise em condições aeróbicas e anaeróbicas, respectivamente?
Aeróbico: lactato | Anaeróbico: acetil-CoA
Aeróbico: piruvato é excretado | Anaeróbico: entra no ciclo de Krebs
Aeróbico: convertido em acetil-CoA | Anaeróbico: convertido em lactato ou etanol
Aeróbico: vira NADH | Anaeróbico: vira FADH₂
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
O ciclo de Krebs é uma sequência de reações de oxidação que ocorrem na matriz mitocondrial. Durante essa etapa da respiração celular, para cada molécula de piruvato, originadas ao final da glicólise, temos a formação de:
Uma molécula de NADH + H⁺, três moléculas de FAOH₂, duas moléculas de CO₂ e duas moléculas de ATP.
Três moléculas de NADH + H⁺, uma molécula de FADH₂, duas moléculas de CO₂ e uma molécula de GTP.
Três moléculas de NADH + H⁺, duas moléculas de FADH₂, duas moléculas de CO₂ e duas moléculas de ATP.
Duplas moléculas de NADH + H⁺, uma molécula de FADH₂, duas moléculas de CO₂ e uma molécula de GTP.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A glicólise, o ciclo de Krebs e a fosforilação oxidativa ocorrem, respectivamente, em quais regiões da célula?
Citoplasma, matriz mitocondrial, membrana interna da mitocôndria
Núcleo, citoplasma, membrana plasmática
Citoplasma, núcleo, membrana externa da mitocôndria
Retículo endoplasmático, citoplasma, matriz mitocondrial
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