Seq A binds to hemi methylated DNA and is required for delaying rereplication. 

TLS Online TPP Program

#Id: 6372

#Unit 2. Cellular Organization

lacZ encodes for b-galactosidase,a tetramer of 500 kD. The enzyme breaks lactose is cleaved into glucose and galactose.  This enzyme also produces an important byproduct, b-1,6-allolactase.

TLS Online TPP Program

#Id: 6818

#Unit 8. Inheritance Biology

Quantitative character - Large number of possible phenotypes that are not easily distinguished.

TLS Online TPP Program

#Id: 421

#Unit 2. Cellular Organization

The nucleosome is 200 bp of DNA, organized by an octamer of small, basic histone proteins into a beadlike structure. 

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#Id: 7365

#Unit 5. Developmental Biology

Drosophila eggs undergo Superficial cleavage.

TLS Online TPP Program

#Id: 6417

#Unit 2. Cellular Organization

The trp operon is controlled by repression and attenuation, providing a two-stage response to progressively more stringent tryptophan starvation. But attenuation alone can provide robust regulation: other amino acid operons such as leu and his rely entirely on attenuation for their control. In the case of the leucine operon, its leader peptide has four adjacent leucine codons, and the histidine operon leader peptide has seven histidine codons in a row.