There were four rules of parity given by Erwin Chargaff 

1) Base A in one strand of the duplex is matched by (T) in the other strand, and base G in one strand of the duplex is matched by a complementary base (C) in the other strand

2) equal amounts of A and T, and equal amounts of C and G, in each single strand of the duplex. 

3) Purines in non-template strand applies more closely to Exons

4) GC content tends to be greater in exons than in introns

choose the correct option regarding rules 

#Question id: 19297

#Unit 13. Methods in Biology

#Question id: 11522

#Unit 2. Cellular Organization

#Question id: 11485

#Unit 7. System Physiology – Animal

In the odorant cells of mammals, specific odorants are detected by binding to _______

#Question id: 5544

#Unit 5. Developmental Biology

Which embryonic membrane forms the commonly of the placenta?

#Question id: 7766

#Unit 5. Developmental Biology

The relationship between shortened telomeres and stem cell depletion has been seen in degenerative diseases such as mouse muscular dystrophy,

I) When____ is activated by damaged telomeres, DNA replication halts, and if the repair doesn’t work, apoptosis is initiated. If the cell is a stem cell or some other rapidly replicating cell, this will reduce the numbers of cells produced, and the lack of stem cells will produce an “aged” phenotype.

 II) When ____ is activated by damaged telomeres, DNA replication halts, repair do its work, apoptosis is inhibited. If the cell is a stem cell or some other rapidly replicating cell, this will increase the numbers of cells produced, and then these cells will produce an “aged” phenotype.

 Choose correct gene name with right statement