Which of the following regulatory scenarios of cell-type-specific expression of fibronectin isoforms in humans is (are) consistent with information on known splicing factors?

a. A Tra-like splicing factor expressed in fibroblasts is required for inclusion of EIIIA and EIIIB exons.

b. An Sxl-like splicing factor is required in hepatocytes for exclusion of EIIIA and EIIIB exons.

c. A Tra-2-like factor enhances binding of the cleavage/polyadenylation complex in fibroblasts.

d. A Dsx-like protein is required to inhibit transcription of the fibronectin gene.

TLS Online TPP Program

#Question id: 6998

#Unit 5. Developmental Biology

Which of the following is an adult organism that has fewer than 1,000 cells?

TLS Online TPP Program

#Question id: 21955

#Unit 2. Cellular Organization

Matrix associated region are 

TLS Online TPP Program

#Question id: 14970

#Unit 2. Cellular Organization

A research lab is trying to produce new antibiotics. They come up with drugs that detach the hydrophilic heads from the phospholipids in plasma membranes. This drug

TLS Online TPP Program

#Question id: 3462

#Unit 11. Evolution and Behavior

Which describes brightly colored peacocks mating more frequently than drab peacocks?

TLS Online TPP Program

#Question id: 2571

#Unit 2. Cellular Organization

While examining a rock surface, you have discovered an interesting new organism. Which of the following criteria will allow you to classify the organism as belonging to Bacteria but not Archaea or Eukarya?