![naomicervero](/avatars/24093.jpg)
naomicervero
18.10.2019 •
Biology
Hexokinase can use glucose or fructose as a substrate. the km forglucose is 0.15 mm and for fructose km = 1.5 mm.
which of the following statement is true?
a. for which substrate does hexokinase have the highest affinity? why?
b. calculate v as a percentage of vmax for each substate when [s]equals 0.15mm.
Solved
Show answers
More tips
- H Health and Medicine What to Eat to Lose Weight?...
- S Society and Politics Will Japan become Russia s Military Enemy?...
- P Philosophy Is Everything We Strive for Eventually Achieved and Destroyed?...
- S Society and Politics Understanding Politics and Its Role in the Development of Civilization...
- P Philosophy Why Did God Create Man and Place Him in Obscurity?...
- S Society and Politics Skoptsy: Who They Are and How They Perform Castration?...
- O Other Childhood Fears: What Many of Us Experienced...
- P Philosophy What is Something for you?...
- H Health and Medicine Why Do Humans Have One Heart?...
- P Philosophy Unbelievable stories of encounters with otherworldly forces...
Answers on questions: Biology
- B Biology RNA differs from DNA in that RNA: A. contains a different sugar molecule. B. contains the nitrogen base uracil. C. All of the above...
- B Biology How does the process of ridge push cause the formation of new oceans?...
- B Biology Draw, classify and give characters body form, reproduction and symbiotic or pathogenic characters of following protists. Giardia, Trypanosoma, Euglena, Diatom, Dinoflagellate,...
- B Biology Answer the following: 1. Make a comparison and write down ways in which plant cells are different from animal cells. 2. How is a prokaryotic cell different from a...
- B Biology Scientific research companies sell kits that allow researchers to produce proteins in test tubes via aprocess known as in vitro translation. Which one of following...
- B Biology Question Q2. A student places peaches into a pure water solution Give two differences you would expect to find in the water after ino hours....
- B Biology Can all illnesses be treated the same? Explain your answer....
- B Biology Two species of sunflowers grow on either side of a mountain. For a while, the two sunflower populations evolve separately. With the climatic changes, an animal population...
- B Biology Need help asap Kevin dislikes his teacher; therefore, Kevin thinks his teacher dislikes him. Which of the following defense mechanisms best represents this scenario?...
- B Biology Southern ocean islands and surface area...
Ответ:
a) glucose because Km is less for glucose.
b) For glucose, V as a percentage of Vmax = 50 %
For fructose, V as a percentage of Vmax = 9 %
Explanation:
a) Hexokinase has highest affinity for glucose because it's Km for glucose is low.
When enzyme [E] binds a substrate [S] an [ES] complex is formed. It is represent as under:
[E] + [S] ⇌ [ES] ⇌ [E] + [P]
As soon as [ES] is formed it may either form [E] & [P] in a forward reaction or dissociate back into [E] & [S]. Km is known as dissociation constant which represents the extent to which [E] & [S] are being formed. A higher value of Km represents formation of more [E] & [S] back from [ES]. It also means that binding affinity of enzyme with substrate is less or we can say that Km is inversely proportional to binding affinity.
Km ∝ 1 / binding affinity.
So, it simply means that lower the Km more will be the affinity of the enzyme for the substrate. In the given question, Km for glucose is 0.15 mM which is less than fructose (Km for fructose = 1.5 mM) that is why glucose is the answer.
b) The formula for Michaelis–Menten equation is as under:
V = Vmax × [S] / ([S] + Km)
V / Vmax = [S] / ([S] + Km)
Here, for glucose Km = 0.15 mM and [S] = 0.15mM.
So V as a percentage of Vmax for glucose will be as under:
V / Vmax = 0.15/0.15 + 0.15
→ V / Vmax = 0.15/0.30
→ V / Vmax = 0.5 = 1/2 = 50 %
Here, for fructose Km = 1.5 mM and [S] = 0.15mM.
So V as a percentage of Vmax for fructose will be as under:
V / Vmax = 0.15/0.15 + 1.5
→ V / Vmax = 0.15/1.65
→ V / Vmax = 0.09 = 9/100 = 9 %
Ответ:
They produce industrial pollution.
Explanation: Biofuels may emit lower carbon footprints but the process involved in the production of these fuels largely depends on oil and water.