Which of the following is an example of cooperativity?
A) the binding of an end product of a metabolic pathway to the first enzyme that acts in the pathway
B) one enzyme in a metabolic pathway passing its product to act as a substrate for the next enzyme in the pathway
C) a molecule binding at one unit of a tetramer, allowing faster binding at each of the other three
D) the effect of increasing temperature on the rate of an enzymatic reaction
E) binding of an ATP molecule along with one of the substrate molecules in an active site
Answer: C
Learn More :
Biology
- During aerobic respiration, electrons travel downhill in which sequence?
- A young animal has never had much energy. He is brought to a veterinarian for help and is sent to the animal hospital for some tests. There they discover his mitochondria can use only fatty acids and amino acids for respiration, and his cells produce more lactate than normal. Of the following, which is the best explanation of his condition?
- Carbon dioxide (CO2) is released during which of the following stages of cellular respiration?
- How many carbon atoms are fed into the citric acid cycle as a result of the oxidation of one molecule of pyruvate?
- During cellular respiration, acetyl CoA accumulates in which location?
- Which of the following intermediary metabolites enters the citric acid cycle and is formed, in part, by the removal of a carbon (CO2) from one molecule of pyruvate?
- The transport of pyruvate into mitochondria depends on the proton-motive force across the inner mitochondrial membrane. How does pyruvate enter the mitochondrion?
- Why is glycolysis described as having an investment phase and a payoff phase?
- Which kind of metabolic poison would most directly interfere with glycolysis?
- A molecule that is phosphorylated
- In glycolysis, for each molecule of glucose oxidized to pyruvate
- Starting with one molecule of glucose, the energy-containing products of glycolysis are
- The free energy for the oxidation of glucose to CO2 and water is -686 kcal/mol and the free energy for the reduction of NAD? to NADH is +53 kcal/mol. Why are only two molecules of NADH formed during glycolysis when it appears that as many as a dozen could be formed?
- In addition to ATP, what are the end products of glycolysis?
- During glycolysis, when each molecule of glucose is catabolized to two molecules of pyruvate, most of the potential energy contained in glucose is
- Substrate-level phosphorylation accounts for approximately what percentage of the ATP formed by the reactions of glycolysis?
- Why are carbohydrates and fats considered high energy foods?
- An electron loses potential energy when it
- Which process in eukaryotic cells will proceed normally whether oxygen (O2) is present or absent?
- The oxygen consumed during cellular respiration is involved directly in which process or event?
- The ATP made during glycolysis is generated by
- Where does glycolysis take place in eukaryotic cells?
- Which of the following statements describes NAD??
- When a molecule of NAD? (nicotinamide adenine dinucleotide) gains a hydrogen atom (not a proton), the molecule becomes
- When a glucose molecule loses a hydrogen atom as the result of an oxidation-reduction reaction, the molecule becomes
If the answers is incorrect or not given, you can answer the above question in the comment box. If the answers is incorrect or not given, you can answer the above question in the comment box.