Molecular Basis of Inheritance — BIOLOGY STD 12 Science — Question

Name the basic requirement of any ecosystem to function and sustain properly.

What are the sampling port in a bioreactor?

Which DNA polymerase remains active even at high temperature?

The transgenic animals are those which have __________________:

1. Foreign DNA in some of its cells
2. Foreign DNA in all its cells
3. Foreign DNA and RNA in some of its cells
4. Foreign DNA and RNA in all its cells

About 200 species of cichlid fish became extint when a particular fish was introduced in lake Victoria of Africa. Name the invasive fish.

Write the expanded form of IUCN.

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.

When does DNA replicate in the cell cycle?

What is called a small knob like structure located above the urethra near the upper meeting point of two labia majora?

Given below is a schematic representation of a lac operon in the absence of an inducer. Identify 'a'and 'b' in it.