#Question id: 30049
#Unit 7. System Physiology – Animal
Myocardial fibers are separated by membranes, but depolarization spreads radially (syncytium) because of the presence of:
#Question id: 28628
#Unit 2. Cellular Organization
In case of yeast G1/S phase cyclin-CDKs stimulated by__
#Question id: 2894
#Unit 2. Cellular Organization
Which of the following statements is INCORRECT regarding the assembly of DNA into higher-order chromatin structure?
I. Histone H1 is not part of the histone octamer, but binds to linker DNA and is responsible for higher-order chromatin structure.
II. The 30 nm fibers of a chromosome are attached to a/an RNA-protein scaffold that holds the fibers in large loops.
III. It is not possible for linear DNA to be supercoiled. Only circular DNA, which has no ends, can have regions of supercoiling.
IV. Core histones lacking their amino-terminal tails are capable of forming 30-nm fibers as they help to stabilize the 30-nm fiber in internucleosomal interactions.
#Question id: 7012
#Unit 5. Developmental Biology
The differentiated cells divide but maintain their differentiated functions. The new cells do not come from stem cells, nor do they come from the dedifferentiation of the adult cells. Each cell produces cells similar to itself; no mass of undifferentiated tissue forms. This type of regeneration is:
#Question id: 11473
#Unit 7. System Physiology – Animal
Lateral inhibition via horizontal cells in the mammalian retina ________.