Laticifers are made of individual cells and can occur either as articulated systems (single cells connected by a small tube) or non-articulated systems (one large syncytial cell).

TLS Online TPP Program

#Id: 3371

#Unit 3. Fundamental Processes

Structural studies show that the active site of DNA Pol h is better at accommodating a thymine dimer than is the active site of another translesion DNA polymerase (DNA Pol k

TLS Online TPP Program

#Id: 4317

#Unit 11. Evolution and Behavior

The Theory of Spontaneous Generation

The Greek philosopher Aristotle (384–322 BC) was one of the earliest recorded scholars to articulate the theory of spontaneous generation, the notion that life can arise from nonliving matter.

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#Id: 6462

#Unit 3. Fundamental Processes

A typical gene transcribed by RNA polymerase II has a promoter that extends upstream from the site where transcription is initiated.

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#Id: 3658

#Unit 3. Fundamental Processes

Selenocysteine is incorporated into proteins with the aid of a tRNA that interprets the UGA Stop codon as a Sec codon. tRNASec is initially charged with serine in a reaction catalyzed by the same SerRS that charges tRNASer.

TLS Online TPP Program

#Id: 5550

#Unit 7. System Physiology – Animal

The second half of the distal tubule and the subsequent cortical collecting tubule have two distinct cell types:  principal cells and intercalated cells