You are studying a metabolic enzyme that is found in organisms living at extremely high temperatures and an acidic environment.
You carry out your reactions on your lab bench at room temperature in water and find that the reaction is quite slow, even though you are able to reach a Vmax. Which of the following is not a good way to increase the rate of the reaction? A) Add more enzyme to the reaction.
B) Increase substrate concentration.
C) Decrease the pH of the reaction solution.
D) Increase the temperature.
As the organism is living in environment with high temprature and (acidic) low pH the enzymes are affected as follows :
<u>Increased Temprature : </u>Initially the rate of reaction increase (10 degrees rise in T causes 50 to 100% rise in activity of enzyme) but ultimately over the period of time enzymes become denatured , hence they cannot stimulate the rate of reaction even if the substrates are added.
<u>Effect of pH: </u>pH is the factor of stability of the enzymes but if the pH becomes extremely low or high the activity of enzymes is affected in such a way resulting in complete loss of activity of enzyme hence addtion of substrates can't increase the activity.
Thus among the given options , option B is the right choice as the increase in the substrate won't increase the activity of the enzyme as they are already denatured.
Increasing the substrate concentration can increase the rate of the reaction to a certain point. However, once all of the enzymes bounded to the substrate, any further addition of it will not be going to affect or increase the rate of the reaction at all, as all the enzymes will be saturated and working in their maximum rates.
Los volcanes Villarrica, Llaima, Volcán Osorno, Chillán (en Chile), Nevado de Colima, Volcán Ceboruco, Popocatépetl (en México)ejemplos de estratovolcanes
with traits best suited to their current environment
Explanation:
Natural selection proposes that nature selects those organisms that are well adapted to the prevailing environmental conditions to survive and reach reproductive maturity with the favourable characteristics being passed on to the offspring. Those organisms that are poorly adapted die leaving no offspring and their traits are eventually eliminated.
Sedimentary rock can become metamorphic rock under intense heat and
pressure. The heat and pressure do not change the rock's chemical
composition, but do change its physical properties like hardness,
texture, and structure.
SEM and TEM are electron microscopes whereas the SEM uses reflected electrons and TEM uses transmitted electrons to form an image
Explanation:
SEM is the scanning electron microscopes and TEM is the Transmission electron microscope
SEM works by detecting the scattered electrons to create an image of the sample whereas the TEM detects the transmitted electrons to create the image of the sample
SEM will only be analysing the surface of the sample whereas TEM collects data vertically also
TEM sample needs to cut thinner than SEM and TEM will give high-resolution images than SEM
