BIOL 134 (6) Questions with CORRECT Answers
Question:
What is the difference between normal cells and cancer cells in terms of
densitydependent inhibition and anchorage dependence?
Answer:
Normal healthy cells are both densitydependent and anchoragedependent, meaning
that the cells must be attached to a surface and that crowded cells stop dividing.
Cancer cells are neither densitydependent nor anchoragedependent, meaning they can
form large clumps (tumors) and grow in suspension.
Question:
What are the 6 cellular characteristics of malignant tumors
Answer:
May have unusual number of chromosomes May make their own growth factors May
stimulate angiogenesis Evades the immune system Metabolism is disabled, thus is an
unconstructive cell. Destroy organs
Question:
How do mutations in ras and p53 in normal cells lead to cancer? 24. centromere
Answer:
Ras is the go signal for cell division so if it is mutated it may never start. p53
is the stop for cell division so if it mutates cells will keep multiplying.
Question:
What are the cytoskeletal elements that make up the contractile ring?
Answer:
Microfilaments
Question:
What is the difference between Cytokinesis in plants vs animal cells?
Answer:
In animal cells, cytokinesis occurs by forming a cleavage furrow, using
microfilaments to form a contractile ring. In plants, it uses a cell plate which
forms during cytokinesis.
Question:
What is the difference between normal cells and cancer cells in terms of
densitydependent inhibition and anchorage dependence?
Answer:
Normal healthy cells are both densitydependent and anchoragedependent, meaning
that the cells must be attached to a surface and that crowded cells stop dividing.
Cancer cells are neither densitydependent nor anchoragedependent, meaning they can
form large clumps (tumors) and grow in suspension.
Question:
What are the 6 cellular characteristics of malignant tumors
Answer:
May have unusual number of chromosomes May make their own growth factors May
stimulate angiogenesis Evades the immune system Metabolism is disabled, thus is an
unconstructive cell. Destroy organs
Question:
How do mutations in ras and p53 in normal cells lead to cancer? 24. centromere
Answer:
Ras is the go signal for cell division so if it is mutated it may never start. p53
is the stop for cell division so if it mutates cells will keep multiplying.
Question:
What are the cytoskeletal elements that make up the contractile ring?
Answer:
Microfilaments
Question:
What is the difference between Cytokinesis in plants vs animal cells?
Answer:
In animal cells, cytokinesis occurs by forming a cleavage furrow, using
microfilaments to form a contractile ring. In plants, it uses a cell plate which
forms during cytokinesis.
