The active principle in foxglove (Digitalis sp.) is cardinolide digitoxin  is a

a. cardiac glycoside 

b. that activate ATPase activity 

c. that inhibits ATPase activity 

d. can increase myocardial contraction

Which of the following is not true regarding digitoxin

#Question id: 4530

#Unit 3. Fundamental Processes

A protein complex engaged in the pairing of homologous chromosomes during cell division has also been implicated in stabilizing certain enhancer–promoter loops.

#Question id: 4531

#Unit 3. Fundamental Processes

Specific elements called insulators control the actions of activators. When placed between an enhancer and a promoter,

#Question id: 4532

#Unit 3. Fundamental Processes

Locus control region, or LCR,

#Question id: 4533

#Unit 3. Fundamental Processes

When multiple activators work together, they often do so synergistically. That is, the effect of

#Question id: 4534

#Unit 3. Fundamental Processes

The yeast Saccharomyces cerevisiae divides by budding: instead of dividing to produce two identical daughter cells, the so-called mother cell buds to produce a daughter cell, The HO gene is expressed only in mother cells and only at a certain point in the cell cycle,

#Question id: 4535

#Unit 3. Fundamental Processes

The activators bind—and the enhanceosome forms—in a highly cooperative manner, ensuring that all three activators must be present. The following are three ways the regulators might be binding cooperatively:

I- Through direct protein–protein interactions between them

II- By changes in the DNA caused by binding of one protein helping binding of another;

III- By the fact that the activators all interact simultaneously with the coactivator.