In Notch/Delta pathway, 

signaling molecule is Delta, an integral membrane protein bound to the surface of the signaling cell.

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#Unit 11. Evolution and Behavior

The Forces of Evolution

mutation, 

genetic drift

gene flow or migration

selection.

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#Unit 3. Fundamental Processes

The modified base can be repaired before replication by DNA glycosylase via the base excision pathway. If replication occurs before the oxoG is removed, resulting in the misincorporation of an A, then a fail-safe glycosylase can remove the A, allowing it to be replaced by aC. This provides a second opportunity for the DNA glycosylase to remove the modified base.

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#Unit 2. Cellular Organization

When CDK activity is low= helicases are loaded in G1

When CDK activity is high= helicases are activated in

S, G2 & M

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#Unit 3. Fundamental Processes

Opening oriC involves action at two types of sequence in the origin: 9-bp and 13 -bp repeats.

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#Unit 4. Cell Communication and Cell Signaling

Hinge region provide the flexibility  and  found in only IgD, IgG and IgA, while hinge region are not found in other two antibodies IgM and IgE.