A: It is a normal cellular gene
B: They are normally involved in the control of the cell cycle
C: When mutated or inappropriately expressed,can cause a cell to become malignant
D: All of the above
举一反三
- Normally, if a healthy cell acquires too many mutations to develop properly, the p53 gene will initiate cellular suicide. If this gene stops working, however, the cell keeps growing and can become malignant .
- Which of the following statements is right? A: RB exerts anti-proliferative effects by controlling the G1-to-S transition of the cell cycle B: RB is a key positive regulator of the cell cycle C: The TP53 was the first tumor suppressor gene to be discovered by the study of retinoblastoma D: Malignant transformation is only derived from one of the normal RB alleles inactivated
- Which<br/>of the following cell cycle descriptions is CORRECT? () A: DNA are replicated during the G2 phase. B: Interphase is when the cell spends most of its time performing its<br/>cell functions. C: The interphase consists of prophase, metaphase, anaphase, and<br/>telophase. D: Cell prepare itself for mitosis during S phase
- The stages which a cell passes from one cell division to the next is called () A: cell cycle B: life cycle C: energy cycle D: regeneration<br/>cycle
- Which of the following cells can not be found in the skin? A: Merkel cell B: Kupffer cell C: Langerhans cell D: Melanocyte
内容
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Which of the following about cell cycle is NOT true？（ ） A: We can get the synchronization of the cells by blocking DNA synthesis by TdR. B: Cytokinesis of animal cells is mediated by a contractile ring of actin and myosin II filaments. C: Meiosis II is similar to meiosis I. D: According to the characteristics of cell division, cell groups can be divided into three types, such as Cycling cells, Terminally Differentiated cells and Quiescent cell.
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Which type of endosperm formation includes two stages: free nucleus formation stage and cell formation stage? A: nuclear endosperm B: cellular endosperm C: helobial endosperm D: the above types are all included
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When you doing transgenic plant, you could do overexpression, gene knock-down or gene knock out. Overexpression usually refers to an experiment when DNA is added to the cell to force expression of the gene to a much higher than normal level.（）
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The chromosome theory of inheritance states that A: All are correct B: chromosomes are made of DN C: genes are located on chromosomes. D: alleles of a gene segregate during cell division.
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During which phase of the cell cycle would a cell go into a quiescent state? A: G0 B: G1 C: G2 D: S