Concept explainers
Introduction:
In cell cycle, a mother cell divides into two daughter cells. The cell cycle mechanism is divided into four stages G1, S, G2 and M. G1, first gap phase within interphase, also known as growth phase. During G1 phase, cell synthesis proteins and produces more number of mitochondria and ribosomes increase their size of growth. In G1 phase, cell synthesis and accumulate materials are needed for
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Anatomy & Physiology: The Unity of Form and Function
- As a result of lost cell cycle control, a cell may a. immediately die b. continously divide to form a tumor c. prematurely stop dividing d. after itself into a different cell typearrow_forwardMatch the following terms with the correct description Go phase A. During this phase, the cell divides into two identical cells. G, phase B. During this phase, the cell grows In size and synthesizes MRNA Gz phase C. This phase directly precedes mitosis. s phase D. This phase can be percelved as a moment in time in which the cell is nelther dividing nor preparing to divide. M phase E. DNA Is replicated during this phase.arrow_forwardCancer cells can secrete factors which promote the formation of new blood vessels. The formation of the new blood vessels in this manner is called Select one: O a. carcinogenesis O b. angiogenesis O c. metastasis O d. apoptosis O e. contact inhibitionarrow_forward
- Assuming that apoptosis fails and the cell continues through several cell cycles... what would the repercussions of this be? A. a tumor (possibly malignant) may develop- result of cells actively dividing when they are not supposed to B. organ failure C. too many cells would be in G0 and not carrying out daily functions D. too many mutated cells would be in the body and the body would shut downarrow_forward46. If a cell does not receive a go ahead signal at the G1 checkpoint in the cell cycie then it will a. proceed On to the "S" phase b. go directly to jail - Do not pass GO. DO nột collect $200 c. proceed to mitosis d. enter a nondividing state called the Go phase 47. When T2 phages infect bacteria and make more viruses in the presence of radioactive phosphorus, what is the result? The bacterial DNA will be radioactive. b. The viral DNA will be radioactive. The bacterial DNA will be radioactive. c. The viral DNA will be radioactive. The viral proteins will be radioactive. d. The viral DNA will be radioactive. The viral proteins will be radioactive. e. 48. Each amino acid attaches to its proper tRNA with the help Of a. DNA b. an enzyme and ATP c. an enzyme d. ATP e. an enzyme and DNAarrow_forwardIf M-phase-promoting factor is injected into a Xenopus primary oocyte, which of the following occurs? only one answer is correct from the following. a. S phase begins. b. Apoptosis is induced. c.The nuclear envelope breaks down. d. The oocyte arrests in G2. e. Mitosis is completed.arrow_forward
- Explain Correctly , why answer is correct , others option incorrect. ASAParrow_forwardB. Sequence the following events based on when they happen in the cell, starting from the interphase. Write A for the earliest event a nd UNDERSTAND for the latest. 1. G2 phase 2. G1 phase 3. Metaphase 4. Anaphase 5. Cytokinesis 6. Telophase 7. Metaphase checkpoint 8. G1 checkpoint 9. G2 checkpoint 10. Prophasearrow_forwardCells that DO NOT divide or participate in the cell cycle are usually arrested in what phase? a. S phase b. Prophase c. G2 d. G0 e. M phasearrow_forward
- Which of the following cell types would you expect would grow and divide continuously if given sufficient nutrients and mitogens (select all that apply)? A. Carcinoma cells from a liver biopsy B. Embryonic Stem Cells C. Normal human liver cells D. HeLa Cells E. Brain cells from micearrow_forwardIn a normal cell, signals from the external environment play a role in determining whether the cell will grow or replicate during what phase(s) of the cell cycle? A. The S phase only B. The G1 phase only C. The G2 phase only D. Both the G2 and S phases E. All phases of the cell cyclearrow_forwardMatching Terms: A. Prophase B. Anaphase C. Telophase D. Metaphase E. Interphase _____1. The sister chromatids are moving apart. _____2. The nucleolus begins to fade from view. _____3. A new nuclear membrane is forming. _____4. The cell membrane begins to pinch in. _____5. The chromosomes de-condense. _____6. The chromosomes are located at the equator. _____7. The nuclear membrane begins to fade from view. _____8. The chromosomes move towards the poles of the cell. _____9. Sister chromatids line up along the equator. _____10. The division (cleavage) furrow appears _____11. The spindle is formed. _____12. Chromosomes are not visible. _____13. The cell plate begins to be built. _____14. Chromosomes replicated. _____15. The reverse of prophase.arrow_forward
- Biology (MindTap Course List)BiologyISBN:9781337392938Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. BergPublisher:Cengage Learning