CELL DIVISION
CELL DIVISION AND CANCEROUS CELLS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
indicates that cells must be attached to their neighboring cells in order to divide properly
|
|
|
indicates that cells stop dividing when they touch other cells
|
|
|
is influenced by growth factors that bind to cell receptors
|
|
|
all of the above
|
Detailed explanation-1: -The central components of the cell-cycle control system are cyclin-dependent protein kinases (Cdks), whose activity depends on association with regulatory subunits called cyclins. Oscillations in the activities of various cyclin-Cdk complexes leads to the initiation of various cell-cycle events.
Detailed explanation-2: -The core control system of the cell cycle. Cyclins, cyclin-dependent kinases (Cdks), and the APC/C.
Detailed explanation-3: -In eukaryotes, the cell cycle consists of four discrete phases: G1, S, G2, and M. The S or synthesis phase is when DNA replication occurs, and the M or mitosis phase is when the cell actually divides. The other two phases-G1 and G2, the so-called gap phases-are less dramatic but equally important.