The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus.

TLS Online TPP Program

#Id: 3505

#Unit 2. Cellular Organization

Parity rules by Erwin Chargaff

Rule of complementarity (First parity rule)

Rule of Equal amount applies more closely to introns than to exons (Second parity rule)

Cluster rule – Purines in nontemplate strand applies more closely to Exons (Third parity rule)

GC Rule- GC content tends to be greater in exons than in introns (Fourth parity rule

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#Id: 6427

#Unit 8. Inheritance Biology

TLS Online TPP Program

#Id: 2492

#Unit 13. Methods in Biology

In conventional discontinuous gel electrophoresis two type of GEL system is used on top with comb there is a stacking gel with pH 6.8 and below resolving with gel pH 8.8 phenomenon known as isotachophoresis.

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#Id: 169

#Unit 5. Developmental Biology

The optic vesicle secrete two paracrine factors:

 BMP4

 FGF8

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#Id: 1313

#Unit 4. Cell Communication and Cell Signaling

Two large classes of GTPase switch proteins-

Heterotrimeric G proteins

Monomeric G proteins