Data, collected from DNAs of a great many different species, led Chargaff to the following conclusions:

A. The base composition of DNA generally varies from one species to another.

B. DNA specimens isolated from different tissues of the same species have the different base composition.

C. The base composition of DNA in a given species changes with an organism’s age, nutritional state, or changing environment.

D. In all cellular DNAs, the sum of the purine residues equals the sum of the pyrimidine residues.

Which of the above statements are INCORRECT regarding Chargaff’s rule?

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#Question id: 1037

#Unit 4. Cell Communication and Cell Signaling

In a rapidly multiplying bacterial population, cell numbers increase

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#Question id: 23913

#General Aptitude

tree, which is popular in social forestry programme in India, is:

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#Question id: 1538

#Unit 4. Cell Communication and Cell Signaling

Many aspects of the biology of stem cells, including maintenance of pluripotency, self-renewal, and differentiation, are controlled by the phenomenon of RNA interference involving a variety of small molecules of RNA.

Match the following miRNA (Column I) with their target gene (Column II).

Column I	Column II
a. Let-7 miRNA	i. Bcl-2
b. miR-16	ii. PTEN phosphatase
c. miR-125a and miR-125b	iii. Myc
d. miR-21	iv. LIN28

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#Question id: 11993

#Unit 10. Ecological Principles

Which of the following statements about light in aquatic environments is correct? 

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#Question id: 10328

#Unit 9. Diversity of Life Forms

The term that is most appropriately associated with clade is