Lecture Exam 4 Biology 1408 Questions With
Complete Answers
A specific gene, called GRAB, prevents a cell from entering mitosis if there are any signs of
DNA damage. This means that GRAB would be a type of - ANSWER cell cycle checkpoint
Apoptosis - ANSWER programmed cell death; often referred to as cellular suicide
Cell cycle checkpoints detect and control - ANSWER DNA content, signals that promote cell
division, DNA damage, and proper chromosome alignment.
-monitor each stage of the cell cycle and prevent progression through the cell cycle until
previous stages have been successfully completed.
Cell division is usually kept under control by - ANSWER several checkpoints in the cell cycle
and by apoptosis
At the G2 checkpoint, cells pause to - ANSWER make sure that all chromosomes have been
copied and are undamaged.
-DNA damage
- DNA replication completeness
(Have chromosomes replicated properly?)
, At the G1 checkpoint, cells pause to - ANSWER cell size, nutrients, growth factors, DNA
damage
(Is there DNA damage that needs repair?)
Programmed cell death is called - ANSWER apoptosis
Proteins scan chromosomes for damage during the - ANSWER G2 checkpoint
Cancer consists of too much - ANSWER cell division
Which of the following helps to prevent cancer? - ANSWER all of the above
-quit smoking, maintain a healthy weight, and get vaccinated.
---- EX: HPV vaccine,
Cancer is: - ANSWER uncontrolled cell growth/division (mitosis)
-a disease of unregulated cell division: cells divide inappropriately and accumulate, in some
instances forming a tumor.
What causes cancer to kill people? - ANSWER Cancer cells crowd out normal cells and disrupt
organ functions.
-when cells accumulate enough DNA damage to interfere with multiple checkpoints
-mutated oncogene is overactive, allowing the cell to divide more often without normal
Complete Answers
A specific gene, called GRAB, prevents a cell from entering mitosis if there are any signs of
DNA damage. This means that GRAB would be a type of - ANSWER cell cycle checkpoint
Apoptosis - ANSWER programmed cell death; often referred to as cellular suicide
Cell cycle checkpoints detect and control - ANSWER DNA content, signals that promote cell
division, DNA damage, and proper chromosome alignment.
-monitor each stage of the cell cycle and prevent progression through the cell cycle until
previous stages have been successfully completed.
Cell division is usually kept under control by - ANSWER several checkpoints in the cell cycle
and by apoptosis
At the G2 checkpoint, cells pause to - ANSWER make sure that all chromosomes have been
copied and are undamaged.
-DNA damage
- DNA replication completeness
(Have chromosomes replicated properly?)
, At the G1 checkpoint, cells pause to - ANSWER cell size, nutrients, growth factors, DNA
damage
(Is there DNA damage that needs repair?)
Programmed cell death is called - ANSWER apoptosis
Proteins scan chromosomes for damage during the - ANSWER G2 checkpoint
Cancer consists of too much - ANSWER cell division
Which of the following helps to prevent cancer? - ANSWER all of the above
-quit smoking, maintain a healthy weight, and get vaccinated.
---- EX: HPV vaccine,
Cancer is: - ANSWER uncontrolled cell growth/division (mitosis)
-a disease of unregulated cell division: cells divide inappropriately and accumulate, in some
instances forming a tumor.
What causes cancer to kill people? - ANSWER Cancer cells crowd out normal cells and disrupt
organ functions.
-when cells accumulate enough DNA damage to interfere with multiple checkpoints
-mutated oncogene is overactive, allowing the cell to divide more often without normal
