46) Where is NADPH produced and where is it used in cell metabolism? A) NADPH is

ID: 872610 • Letter: 4

Question

46) Where is NADPH produced and where is it used in cell metabolism?

A) NADPH is produced during glycolysis and used for pyruvate and oxaloacetate synthesis

B) NADPH is produced during pentose phosphate pathway and used in oxidative phosphorylation

C) NADPH is produced during oxidative phosphorylation and used in TCA cycle

D) NADPH is produced during pentose phosphate pathway and used for fatty acid and steroid synthesis

47) What is the role of GDP and GTP in G-protein coupled receptor?

A) a subunit of G-protein coupled receptor is active only when GDP and GTP are bound to it and phosphorylate GDP to GTP.

B) a subunit of G-protein coupled receptor is active only when GTP is bound to it and hydrolyzes GTP to GDP.

C) a subunit of G-protein coupled receptor is active only when GDP and GTP are bound to it and hydrolyzes GTP to GDP.

D) a subunit of G-protein coupled receptor is active only when GDP is bound to it and phosphorylates GDP to GTP.

48) How does high glucagon concentration affect gluconeogenesis?

A) No effect

B) Increases

C) Decreases

D) An increase after insulin concentration increases also.

49) What are transcription factors?

A) Factors bind to unique sequences and provide specificity for gene expression.

B) DNA sequence that allow transcription to terminate.

C) Factor to modify DNA sequences.

D) Short DNA sequences to specify start site for transcription.

50) What is GLUT?

A) Glycerol transport protein

B) Glutamine transport protein

C) Glucose transport protein

D) Glutamate transport protein

50-C) Glucose transport protein[from high to low concentration]

49-A) Factors bind to unique sequences and provide specificity for gene expression.

48-B) Increases [ gluconeoginesis in which non-hexose substrates such as amino acids are converted to glucose]

47-B) a subunit of G-protein coupled receptor is active only when GTP is bound to it and hydrolyzes GTP to GDP.

46-D) NADPH is produced during pentose phosphate pathway and used for fatty acid and steroid synthesis

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