front 1 How many chromosomes are in a somatic cell? | back 1 46 |
front 2 How many chromosomes are in a gametic cell? | back 2 23 |
front 3 Define gene | back 3 unit of DNA that contains the information to specify synthesis of single polypeptide chain. |
front 4 The total DNA in the chromosomes of an organism is referred as its __________ | back 4 genome |
front 5 Define sister chromatids | back 5 duplicated chromosome (2 strands) |
front 6 The cell cycle is composed of ______________ (I) and __________ (M) phase | back 6 interphase, mitotic |
front 7 Mitotic phase consists of both mitosis and cytokinesis. The former one is divided to _____ subphases | back 7 five |
front 8 What are the names of the phases in mitotic division? | back 8 Interphase, prophase, prometaphase, metaphase, anaphase, telophase, cytokinesis |
front 9 Animal cells form a __________ __________ while plant cells form a ______ ________ to separate. | back 9 cleavage furrow, cell plate |
front 10 Define a checkpoint in a cell | back 10 a critical control point where stop and go signals can regulate the cycle |
front 11 Which signal has to be overridden, the "stop" signal or the "go" signal? | back 11 stop |
front 12 What does Cdk abbreviate? | back 12 Cyclin dependant kinases |
front 13 What does MPF abbreviate? | back 13 maturation promotion factor |
front 14 What is MPF? | back 14 Cdk-cyclin complex, a cyclin and a Cdk attached to each other |
front 15 MPF and cyclin levels rise and fall during mitosis. At what point are MPF levels the highest? When do the levels of cyclin reach their highest and lowest points? | back 15 MPF levels start from zero, peak and return to zero during mitosis. Cyclin levels are lowest during the end of mitosis and rise slowly until they peak in the middle of mitosis |
front 16 Anaphase promoting complex (APC) is normally in an inactive state. What triggers it into an active state? | back 16 when all the kinetochores are attached to the spindle at the metaphase plate |
front 17 What three things are required for animal cells to divide? | back 17 PDGF – platelet-derived growth factor, enough space, Anchorage - attachement to a substratum |
front 18 When cancer cells divide which external inhibitor do they lack? (Scientific term) | back 18 Density-dependent inhibition |
front 19 What are the two types of tumors and what is the difference between them? | back 19 Benign tumor is localised at original site, malignant tumor becomes invasive |
front 20 The spread of cancer cells beyond their original site is called __________ | back 20 metastasis |