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Pentose Phosphate System and Glycogen metabolism test

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LESSON 19 & 20

Pregunta 1 de 9

1

In the Pentose Phosphate System, in which two reactions is NADPH created?

Selecciona una de las siguientes respuestas posibles:

  • - Glucose-6-Phosphate is transformed into 6-Phosphoglucono-δ-lactose
    - 6-Phosphogluconate is transformed into Ribulose-5-Phosphate

  • - Glucose-6-Phosphate is transformed into 6-Phosphogluconate
    - 6-Phosphogluconate is transformed into Ribulose-5-Phosphate

  • - Glucose-6-Phosphate is transformed into 6-Phosphogluconate
    - Ribulose-5-Phosphate is transformed into Xylulose-5-Phosphate

  • - 6-Phosphogluconate is transformed into Ribulose-5-Phosphate
    - Ribulose-5-Phosphate is transformed into Xylulose-5-Phosphate

  • - Glucose-6-Phosphate is transformed into 6-Phosphogluconate
    - 6-Phosphogluconate is transformed into 6-Phosphoglucono-δ-lactose

Explicación

Pregunta 2 de 9

1

The two enzymes present in the non-oxidative face of the Pentose Phosphate System are?

Selecciona una de las siguientes respuestas posibles:

  • Transketolases (able to transfer 2C atoms) and transaldolases (able to transfer 3C atoms)

  • Transaldolases (able to transfer 2C atoms) and transketolases (able to transfer 3C atoms)

  • Transamines (able to transfer 3C atoms) and transaldolases (able to transfer 2C atoms)

  • Transaldolases (able to transfer 3C atoms) and transamines (able to transfer 2C atoms)

  • Any of these

Explicación

Pregunta 3 de 9

1

Liver will storage glycogen for the fasting state and muscle storage glycogen for the fed state

Selecciona uno de los siguientes:

  • VERDADERO
  • FALSO

Explicación

Pregunta 4 de 9

1

What is true about glycogen phosphorylase?

Selecciona una de las siguientes respuestas posibles:

  • 1.) Glycogen phosphorylase can only work in the non-reducing ends

  • 2.) It will stop acting when there are 4 or less residues in a ramification

  • 3.) Glycogen phosphorylase generates a molecule of Glucogen1P and a molecule of glycogen with a residue less from the degradation of a molecule of glycogen

  • Only 1.) and 2.) are true

  • All statements are true

Explicación

Pregunta 5 de 9

1

What happens in a fasting state?

Selecciona una de las siguientes respuestas posibles:

  • In the liver the predominant form of glycogen phosphorylase is the T state and phosphorylated

  • In the liver the predominant form of glycogen phosphorylase is the R state and diphosphorylated

  • In the muscle the predominant form of glycogen phosphorylase is the R state and phosphorylated

  • In the muscle the predominant form of glycogen phosphorylase is the T state and diphosphorylated

  • Any of these is true

Explicación

Pregunta 6 de 9

1

How acts AMP in the production of glycogen phosphorylase?

Selecciona una de las siguientes respuestas posibles:

  • It acts as a inhibitor as glucose in liver

  • It acts as an activator as glucose in liver

  • It acts as an inhibitor as ATP and glucose-6P in muscle

  • It acts as an activator in muscle

  • It acts as an activator as ATP and glucose-6P in liver

Explicación

Pregunta 7 de 9

1

Glucose phosphorylase kinase diphosphorylates glycogen phosphorylase

Selecciona uno de los siguientes:

  • VERDADERO
  • FALSO

Explicación

Pregunta 8 de 9

1

Rellena los espacios en blanco para completar el texto.

Complete the text:

In a situation of , levels of glucose are ; is an hormone secreted and it will bind to the receptor that will activate that will form AMPc that will activate that is going to phosphorylate glycogen phosphorylase kinase that will phosphorylase .

Explicación

Pregunta 9 de 9

1

Glycogen synthesize is active when is not phosphorylated

Selecciona uno de los siguientes:

  • VERDADERO
  • FALSO

Explicación

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