Initiation timing depends on accumulating the active initiator protein DnaA and on inhibitors that turn off newly synthesized origins until the next cell cycle

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#Id: 9624

#Unit 4. Cell Communication and Cell Signaling

Two Mechanisms Down-Regulate Signaling from RTKs

1. Phosphotyrosine phosphatases

2. Receptor-mediated endocytosis followed by degradation in lysosomes

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#Id: 8577

#Unit 2. Cellular Organization

In skeletal muscle, 

The desmin filaments encircle the Z disk and are cross-linked to the plasma membrane. 

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#Id: 6973

#Unit 8. Inheritance Biology

SEX-CHROMOSOME ANEUPLOIDIES 

The most common aneuploidies seen in living humans.

Aneuploidy of the human sex chromosomes is better tolerated than aneuploidy of autosomes.

AUTOSOMAL ANEUPLOIDIES

There is no mechanism of dosage compensation for autosomes.

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#Id: 2729

#Unit 12. Applied Biology

 Golden rice

The transgenic rice, popularly called "golden rice" contains good quantities of carotene, which gives the grains a golden colour. In one transgenic line, the β-carotene content was as high as 85% of the total carotenoids present in the grain.

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#Id: 4781

#Unit 5. Developmental Biology

The P2 cell is also critical in giving the signal that distinguishes ABp from its sister, ABa