TLS Online TPP Program

#Id: 5043

#Unit 3. Fundamental Processes

Dam (Dam-) mutants accumulates hemimethylated products after replication.

If the plasmid is methylated, it undergoes a single round of replication, and then the hemimethylated products accumulate.

Suggesting that a hemimethylated origin cannot be used to initiate a replication cycle.

TLS Online TPP Program

#Id: 3301

#Unit 3. Fundamental Processes

DNA lesions that cause large distortions in the helical structure of DNA generally are repaired by the nucleotide-excision system, a repair pathway critical to the survival of all free-living organisms. 

TLS Online TPP Program

#Id: 188

#Unit 5. Developmental Biology

At high concentrations (about 300 molecules/cell), activin induced expression of the goosecoid gene and instructed the cell to become the frog’s dorsal-most structures.

TLS Online TPP Program

#Id: 4325

#Unit 11. Evolution and Behavior

If a life force besides the airborne microorganisms were responsible for microbial growth within the sterilized flasks, it would have access to the broth, whereas the microorganisms would not.

TLS Online TPP Program

#Id: 5651

#Unit 7. System Physiology – Animal

Homonymous (same side of both 

visual fields) Hemianopia (half blindness)

A lesion in one optic tract causes blindness in half of the visual field