Many fish species have a gas-filled swim bladder that can adjust in size to make the density of the fish’s body equal to that of the surrounding water.

TLS Online TPP Program

#Id: 3182

#Unit 3. Fundamental Processes

The molecular apparatus is different in animal cell mitochondria and uses the protein dynamin, which is involved in formation of membranous vesicles

TLS Online TPP Program

#Id: 2381

#Unit 3. Fundamental Processes

Brr2 facilitates U1 and U4 release

TLS Online TPP Program

#Id: 5088

#Unit 6. System Physiology – Plant

Direct regulation of gene expression by phyB transport to the nucleus.

TLS Online TPP Program

#Id: 5423

#Unit 7. System Physiology – Animal

Pseudo-unipolar cells develops, a single process splits into two, both of which function as axons one going to skin or muscle and another to the spinal cord.

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.