Label the model below representing the change in the DNA content of a cell during the cell cycle.
Move ONE correct answer to each box. Not all answers will be used.
Mmuae Afoforo a Wobɛpaw:
G1 Phase
G2 Phase
Cytokinesis
S Phase
Scientists have reported that more than 95% of the factors that lead to some types of cancers are caused by random DNA-copying errors. During which phase of the cell cycle do these DNA-copying errors most likely occur?
Label the model below representing the change in the DNA content of a cell during the cell cycle.
Move ONE correct answer to each box. Not all answers will be used.
In the table above, a teacher wrote out descriptions of the different phases of mitosis. She then asked her students to put the phases in the correct order that they occur during mitosis. Which of the following would be the correct answer?
This model of the cell cycle includes two arrows that each represent a process in the cycle.
What do the two arrows represent?
Which of the following best describes the purpose of the cell cycle?
Which correctly describes what is occurring at the four different stages of the cell cycle?
Below is a student drawing of the cell cycle. The student made an error in their cell cycle diagram.
What is the name of the missing phase, AND explain what important event happens during that phase.
Read the question carefully. Then enter your answers in the box provided.
Cell division is regulated by a variety of internal and external signals. What reasons might a cell undergo cell division?
Select THREE answers.
A student observed an onion root tip cell under a microscope and made the following observations.
Sister chromatids are separating
Spindle fibers are attached at the centromere
There is no visible nucleolus
What phase of the cell cycle is this student MOST LIKELY observing?
When cells lose their ability to regulate the cell cycle, they can divide at an accelerated rate and form a mass of cells. This mass of cells is referred to as --
Oncogenes are mutated forms of genes. Oncogenes can transform a cell into a tumor cell. Some tumor cells are benign, while others are malignant. How does the presence of an oncogene lead to the formation of a tumor?
Tumor suppressor genes normally catch errors in cells and can trigger programmed cell death before the cells become cancerous. What could cause tumor suppressor genes to malfunction?
Fibroids are a specific type of tumor that grow inside the uterus (female reproductive organ). These tumors are easily treatable and can be removed through surgery.
If fibroids do not spread to other cells or tissues, what kind of tumor are they?
