Which of the following antibiotic is active against fungus?

Which of the following is maintained for optimum production of vinegar?

Which of the following is widely used as a successful biofertiliser in Indian rice field?

Select the correct combination of the statements a-d regarding the characteristics of certain organisms
(1) Methanogens are archaebacteria which produce methane in marshy areas.
(2) Nostoc is a filamentous blue green alga which fixes atmospheric nitrogen.
(3) Chemosynthetic autotrophic bacteria synthesise cellulose from glucose.
(4) Mycoplasma lacks a cell wall and can survive without oxygen.

When domestic sewage mixes with-------

Transgenic plants are developed by

Restriction endonucleases are most widely used in recombinant DNA technology. They are obtained from

Enzyme that cleaves nucleic acids within the polynucleotide chain is known as

Blindness is prevented by use of which crop in poor countries?

Match List I with List II and select the correct option

What is the source organism for EcoRI restriction endonuclease?

Name any genetically modified crop.

Name any two industrially impotant enzymes.

What is the advantage of sparged stirredtank bioreactor?

What are sampling ports in a bioreactor?

Name two enzymes involved in PCR.

What are selectable markers?

Collect 5 examples of palindromic DNA sequences by consulting your teacher. Better try to create a palindromic sequence by following base pair rules.

Discuss with your teacher and find out how to distinguish between RNA and DNA

Give the name of techniques, that are used genetic engineering.

Give the name of the source organisms of the gene cry Iac and its target pest.

Name the blank spaces a,b,c and d given in the following table:

How do microbes reduce the environmental degradation caused by chemicals?

What is BOD? What does it mean if a water sample gas more BOD?

Do eukaryotic cells have restriction endonucleases? Justify your answer.

From what you have learnt, can you tell whether enzymes are bigger or DNA is bigger in molecular size? How did you know?

In the daily Tribune dt. August 20, 2012 there was a news under heading 'New Stem Cell treatement to cure cancer'. Professor Revenue head of bone marrow transplantation at Israel's Hadassah' Medical Centre in Jerusalem said: The technique uses specialised harvested cells to produce infection - fighting bone marrow. Patients with blood cancers have most of their bone marrow destroyed when given radiation or chemotherapy to destroy their disease.
(i) What are stem cells?
(ii) What is the source of stem cells?
(iii) What are the infection - fighting cells produced by bone marrow?
(iv) Name the diseases which can be curved by this life saving treatements.
(v) What is the effect of bone marrow transplantation?

Name the enzyme that can link these two DNA fragments.

Given below is the diagram of agarose gel kept under UV light:

(a)Mark the positive and negative terminals.
(b) What is the charge carried by DNA molecule and how does it help in its separation?
(c)How are the separated DNA fragments finally isolated?

Refer to the diagram given below and answer the questions that follow.

(i) The diagram shown above is insulin or proinsulin, Justify.
(ii) How is mature insulin syntheised?

An organic farmer releies on natural predection for controlling plant pests and diseases. Justify giving reasons why this is considered to be holistic approch.

Identify a,b, c, d, e and f in the table given below:

What will happen if you add a small amount of curd to the fresh milk and keep it for few hours at 25^oC.name the process, chemical changes and the resultant products? Name any three edible products prepared from it.

Few gaps have been left in the following table. Fill up the gaps.

Give an example of a natural form of genetic engineering in which the bacterium inserts gene into plants to cause gall or tumour formation.

Two of the steps involved in producing nematode resistant tobacco plants based on the process of RNAi are mentioned below. Write the missing steps in its proper sequence.

As we know, our rivers Ganga and Yamuna are getting polluted day-by-day.
Many factories discharge sewage effluents into these rivers. The load of pollution in these rivers also increases due to municipal sewage and many things thrown by people in the name of worship. The government has however taken some steps to save these rivers.
(i) What are the values shown by people who throw wastes in rivers?
(ii) How could we help in decreasing pollution of rivers?
(iii) State some advantages of saving the river.
(iv) State the action taken by the government to stop the pollution in these rivers.

Unless the vector and source DNA are cut, fragments separated and joined, the desired recombinant vector molecule cannot be created.
(a) How are the desirable DNA sequence cut?
(b) Explain the technique used to separate the cut fragments.
(c)How are the resultant fragments joined to the vector DNA molecule?

Sohan's mother was suffering from diabetes. Doctors suggested her to take insulin injection, but she refused to go for it because she knows that the insulin is prepared from the body organs of animals (usually from pancreas of cattle and pig). Sohan convinced his mother that the insulin which is being prepared now-a-days is not that which is prepared by slaughterid animals, but it is being prepared by making use of biotechnology. Answer the following questions on the basis of above information.
(i) How insulin is produced through recombinant DNA technology?
(ii) How is the insulin produced through recombinant DNA technology better than one used earlier by diabetic patients.
(iii) What values were exhibited by Sohan in the above situation?

Mohan is a farmer in a village of Karnataka. He is worried about his cotton crop, which being destroyed by insects. His friend suggested him to use Bt variety of cotton. Explain:
(i)Why to use Bt variety of cotton?
(ii) What are the advantage of genetically modified crops?