Which factor could not regulate the cell cyle（）
A. Growth factors
B. cAMP and cGMP
C. Oncogen
D. Cholesterol
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What’s the main funtion of MPF（mature promoting factors）（）
A. Induce the condesion of chromatin
B. Induce the phosphorylation of nuclear lamin
C. Induce the phosphorylation of nucleolus and its dissolution
D. All of the above
About the homologous chromosomes, which is not correct（）
A. One comes from mother, the other comes from father
B. They are the same length and show the same morphology
C. They are two chromosomes coming from chromosome duplication in S pahse
D. They can form synapsis complex
According to the differentiation potential, which of the following sequence is correct（）
A. embryonic stem cell—fetal stem cells—totipotent stem cells
B. totipotent stem cells—adult stem cells—embryonic stem cells
C. pluripotent stem cells—adult stem cells—umbilical cord stem cells
D. unipotent stem cells—multipotent stem cells—totipotent stem cells
Which description is correct about the relationship between cell cycle and cell differentiation（）
A. The cell cycle and cell differentiation is positive related
B. The cell cycle and cell differentiation is negative related
C. The cell cycle and cell differentiation is not directed related
D. The relationship between cell cycle and cell differentiation is random
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