Biochemistry review

How many molecules of ATP are consumed in the preparatory phase of glycolysis

• 3

• 1

• 5

• 2

Which enzyme is responsible for the reversible conversion of ribulose-5-phosphate to ribose-5-phosphate

• Transaldolase

• Transketolase

• Ribulose-5-phosphate isomerase

• Ribose-5-phosphate reductase

In gluconeogenesis, the conversion of oxaloacetate to phosphoenolpyruvate (PEP) requires:

• Hexokinase

• Fructose-1,6-bisphosphatase

• Glucose-6-phosphatase

• Phosphoenolpyruvate carboxykinase

How many molecules of NADH are produce in glycolysis

• 3 NADH

• 2 NADH

• 5 NADH

• 4 NADH

In which cellular compartment does glycolysis occur?

• Cytoplasm

• Nucleus

• Endoplasmic reticulum

• Mitochondria

Whenever the cell's ATP supply is depleted, which of the following enzyme's activity is increased?

• Glucokinase

• Hexokinase

• Pyruvate Kinase

• Phosphofructokinase-1

Gluconeogenesis is energetically costly compared to glycolysis due to the consumption of:

• ADP and NADH

• ADP and NAD+

• ATP and NAD+

• ATP and NADH

The conversion of pyruvate to phosphoenolpyruvate (PEP) in gluconeogenesis requires the input of:

• NAD+

• FADH2

• NADH

• ATP

What is the main purpose of oxidative phosporylation in cellular metabolism

• To generate reducing equivalent for glycolysis

• To produce heat

• To generate ATP from the energy of electron transfer

• To form a proton gradient

What is the general term used for the anaerobic degradation of glucose to obtain energy

• Oxidation

• Metabolism

• Fermentation

• Anabolism