Answer:
Explanation:
A Pure bacterial culture must be grown in sterile tryptophan or peptone broth for 24–48 hours before performing the test. A sterile environment helps to avoid contamination.
When a test is conducted and it shows the presence of a red or red-violet color in the surface alcohol layer it means the result is positive
But when the colour is yellow it indicate negative reaction due to glucose fermentation.
A deviation from two color may also occur when we have an orange color. This colour change is due to the presence of methyl indole
When there is no color change this indicate No decarboxylase which is an enzyme needed for the fermentation reaction.
Color changes are indicator of how successful the reaction was.
Answer:
a) Km = increase, Vmax and kcat = remain same
b) resembles competitive inhibition
Explanation:
Given Data:
- presence of individuals in population having mutation in enzyme gene.
- residue at position 50 substituted with alanine.
- location : site important for substrate bonding but not for enzyme catalysis.
a)
There would be increase in value of Km.
As higher substrate presence could overcome the presence of inhibitors so Vmax value would remain same.
The value of Kcat would also remain the same.
b)
The type of inhibition this mutation resembles is that of competitive inhibition.
Answer:
The gametes are produced within the anthers of the male part and the ovary of the female part of the flower.
A larger number of plant species means a greater variety of crops. Greater species diversity ensures natural sustainability for all life forms. Healthy ecosystems can better withstand and recover from a variety of disasters.
C. CO2 diffuses by way of the stomata.
Carbon dioxide enters the plants through its leaves. Present under the surface of leaves are small holes through which carbon dioxide diffuses into the plant to fulfil its requirements. The leaf also gives off oxygen from these same holes in the leaves. These small holes are called stomata which is the plural form. the singular form of this word, or a single hole on the underside of the leaf is called a stoma.