Milk starts to coagulate when Lactic Acid Bacteria (LAB) is added to milk as a starter. Mention two benefits which LAB provides.

Write any two benefits of lactic acid bacteria.

Lactic acid bacteria (LAB) grow in milk and convert it to curd and improve its nutritional quality by increasing :

In which food would you find lactic acid bacteria? Mention some of their useful applications.

In which food would you find lactic acid bacteria? Mention some of their useful applications.

The circuit arrangement given in the figure shows that when an ac. passes through the coil A, the current starts flowing in the coil B. Mention two factors on which the current produced in the coil B depends.

Mention the importance of acid bacteria to humans other than setting milk into curd.

Two questions consist of two statements each, printed as Assertion and Reason. While answering these questions, you are required to choose any one of the followng four responses. If both Assertion and Reason are true and Reason is a correct explanation of Assertions. If both Assertion and Reason are true but Reason is not a correct explanation of Assertion. If Assertion is true but Reason is false. If both Assertion and Reason are false. Assertion:Only Lactobacillus lactis causes curdling of milk. Reason:Only these bacteria can produce lactic acid.

A colloidal solution is a type of mixture which consists of particles whose size varies between 1 and 1000 nanometres. In colloidal solution the particles are distributed evenly. During this process the particles do not settle down. This is one of the best know thing about colloidal solutions. Properties of colloids and their variation are a well-known area ever since the primitive age. The best example to prove their familiarity with us is that we know from very early times that coagulation of milk results in the formation of curd. Physical properties of colloids 1. The nature of the colloidal solution is heterogeneous i.e. unlike. These solutions dwell with two different phases : • Dispersed medium Dispersed phase. 2. Despite the fact that colloidal dispersions are unlike in description (nature), yet the dispersed fragments are not detectable by the human eye. This is due to the microscopic size of the particles in the solution. 3. The colour of the colloidal dispersion is determined by particles in the solution based on their size. The wavelengths of light that is absorbed will be longer ifthe size of the particle is large. 4. As a result of its size, the colloidal fragments can easily be passed through a traditional filter paper. However, these particles can be filtered by using membranes such as animal, cellophane, and ultrafilters. What are colloidal solution particle.