Microbes in Human Welfare — BIOLOGY STD 12 Science — Question

What is ex situ conservation?

If the base adenine constitutes 31 percent of an isolated DNA fragment, then what is the expected percentage of the base cytosine in it?

What are Eurythermic species?

High fever, loss of appetite, stomach pain and constipation are some of the symptoms seen in a patient. How would the doctor confirm that the patient is suffering from typhoid and not amoebiasis?

Write the name of microorganism used in bread making

The phenotype of the F, hybrid resembles the dominant parent, when there is incomplete dominance. True/ False

Name two alcoholic drinks produced in each of the following ways: (i) with distillation and (ii) without distillation.

A garden pea plant produced axial while flowers. Another of the same species produced terminal violet flowers. Identify the dominant traits.

Directions: In the following questions, the Assertions (A) and Reason(s) (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: PCR can detect very low amounts of DNA and is now routinely used to defect HIV in suspected AIDS patient.
Reason: PCR is a powerful technique to identify many other genetic disorders.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
3. Assertion is correct but Reason is incorrect.
4. Both Assertion and Reason are incorrect.

What is gene gun?