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One difference between cancer cells and normal cells is that cancer cells

(A) are unable to synthesize DNA.

(B) are arrested at the S phase of the cell cycle.

(C) continue to divide even when they are tightly packed together.

(D) cannot function properly because they are affected by density-dependent inhibition.

Short Answer

Expert verified

(A) The option 鈥渁re unable to synthesize DNA.鈥 is false.

(B) The option 鈥渁re arrested at the S phase of the cell cycle鈥 is false.

(C) The option 鈥渃ontinue to divide even when they are tightly packed together鈥 is true.

(D) The option 鈥渃annot function properly because they are affected by density-dependent inhibition鈥 is false.

Step by step solution

01

Description of cells

Cells are the smaller unit found in the body that processes different functions of the body. The cell cycle occurs at various stages, such as the G0 phase, G1 phase, synthesis phase, and mitosis. It is regulated by certain regulatory proteins such as cyclins.

02

Explanation of option (A)

The DNA is synthesized in both the cancer cells as well as normal cells. DNA is the genetic material that is present in the nucleus of each cell.

The difference between cancer cells and normal cells is not DNA production.

Therefore, the given statement is false.

03

Explanation of option (B)

The cancer cells can undergo a synthesis phase similar to the normal cells. The regular cells undergo the synthesis phase to replicate the genetic material, which also happens in the cancer cells.

The synthesis phase is not the difference between normal cells and cancer cells. The cancer cells are not arrested at the S phase due to the loss of control in the cell cycle.

Therefore, the given statement is false.

04

Explanation of option (C)

The rapid division is the significant difference between the normal cells and cancer cells. The division rate of the normal cells is regulated by having a control in the cell cycle. The cancer cells are the cell that loses this control and starts to divide rapidly, forming tumors.

The rapid multiplication of cells due to the loss of control over the cell cycle is the reason for the cancer cells to divide continuously even they are tightly packed.

Therefore, the given statement is true.

05

Explanation of option (D)

The function of the cells is not affected by the density-dependent inhibition of cells. The regular cells limit their growth concerning the density factor is known as density-dependent inhibition of cells.

The density-dependent inhibition is not the difference between the cancer cells and normal cells.

Therefore, the given statement is false.

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Most popular questions from this chapter

Although both ends of a microtubule can gain or lose subunits, one end (called the plus end) polymerizes and depolymerizes at a higher rate than the other end (the minus end). For spindle microtubules, the plus ends are in the center of the spindle, and the minus ends are at the poles. Motor proteins that move along microtubules specialize in walking either toward the plus end-directed and minus end-directed motor proteins, respectively. Given what you know about chromosome movement and spindle changes during anaphase, predict which type of motor proteins would be present on (a) kinetochore microtubules and (b) non-kinetochore microtubules.

How many chromosomes are drawn in each part of figure 12.5? (Ignore the micrograph in step2.)

The histogram representing the treated sample shows the effect of growing the cancer cells alongside human umbilical cord stem cells that produce the potential inhibitor. (a) Label the histogram with the cell cycle phases. Which phase of the cell cycle has the greatest number of cells in the treated sample? Explain. (b) Compare the distribution of cells among G1, S, and G2 phases in the control and treated samples. What does this tell you about the cells in the treated sample? (c) Based on what you learned in Concept 12.3, propose a mechanism by which the stem cell-derived inhibitor might arrest the cancer cell cycle at this stage. (More than one answer is possible.)

Vinblastine is a standard chemotherapeutic drug used to treat cancer. Because it interferes with the assembly of microtubules, its effectiveness must be related to

(A) disruption of mitotic spindle formation.

(B) suppression of cyclin production

(C) myosin denaturation and inhibition of cleavage furrow formation

(D) inhibition of DNA synthesis

Which of the following does not occur during mitosis?

(A) Condensation of the chromosomes.

(B) Replication of DNA.

(C) Separation of sister chromatids.

(D) Spindle formation

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