Biochemistry Questions
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The aldolase reaction is spontaneous in vivo because:A) It is metabolically irreversible under standard biochemical conditions.B) Aldolase uses ATP hydrolysis to make the reaction irreversible.C) The rapid consumption of products pulls the reaction forward.D) The reaction occurs very rapidly.ADCB
glycolysis:starting substrates: glucose or pyruvateenergy requirements (ATP/GTP): 2 ATP or 6 ATPUse of NAD+ and NADH: 2NAD+ or 2NADH
Malonate is a competitive inhibitor of succinate dehydrogenase. Which of the following TCA intermediates accumulate if malonate is present in a preparation of isolated mitochondria?α-ketoglutarateMalateSuccinyl-CoASuccinateFumarate
Both glycogen synthesis and glycogen breakdown share the metabolite:cAMPbiotinGlucose-6-phosphataseGlucose-1-phosphate
Identify if the following statement is true or false:Pyruvate kinase is used in the process of gluconeogenesis.TrueFalse
The anaerobic conversion of 1 mol of glucose to 2 mol of lactate by fermentation is accompanied by the net gain of:1 mol ATP2 mol ATP4 mol ATP3 mol ATP
Which of the following enzymes catalyzes a substrate-level phosphorylation?HexokinaseGlyceraldehyde-3-phosphate dehydrogenaseAldolasePhosphofructokinasePyruvate kinase
In glycogen synthesis, the intermediate between glucose-1-phosphate and glycogen is:glucose-1,6-bisphosphateUDP-glucoseGlucose-6-phosphateGlucose
gluconeogenesis:starting substrates: glucose or pyruvateenergy requirements (ATP/GTP): 2 ATP or 6 ATPUse of NAD+ and NADH: 2NAD+ or 2NADH
Complete the analogy:Glycogen synthase is to the branching enzyme as glycogen phosphorylase is to the ________ enzyme.UDP-glucose phosphorylasedebranchingglycogenin
Under anaerobic conditions within a cell, how many net ATPs are formed from one glucose molecule by substrate-level phosphorylation?2461
Which enzyme is used in gluconeogenesis, but NOT in glycolysis?Phosphoenolpyruvate (PEP) carboxykinasePhosphoglycerate mutaseTriose phosphate isomeraseEnolase
One of the most important products of the pentose phosphate pathway is;NADHQH2NADPHFADH2
What is the net energetic cost of converting two pyruvate to one glucose by gluconeogenesis, in ATP equivalents?68432
What is the initial investment of ATP in the glycolytic pathway per molecule of glucose?1423
The glycolytic enzymes are located in the:ERinner mitochondrial matrixmitochondrial matrixnucleuscytosol
What is the net equation of glycolysis?Glucose + 2 ADP + 2 Pi + 2 NAD+ --> 2 pyruvate + 2 ATP + 2 NADH + 4 H+Glucose + 2 ADP + 2 Pi + 2 NAD+ --> 2 lactate + 2 ATP + 2 NADH + 4 H+
The enzyme phosphoglucomutase catalyzes the isomerization of glucose-6-phosphate to:galactose-6-phosphatefructose-6-phosphateglucose-1-phosphate
State the property of amphipathic phospholipids that enables them to form a bilayer [1]
Once germinated bean grows above the ground, state the process used by the bean in the production starch [1]