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Biotechnology Objective Questions { Cell Cycle }



29.  DNA replication is controlled at which of the following checkpoint?
A.G1
B.G2
C.M
D.S
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30. Which of the following begins when pairs of sister chromatids align in the center of the cell?
A.Anaphase
B.Interphase
C.Metaphase
D.Prophase
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31. How many chromatids are there in a duplicated chromosome?
A.One
B.Two
C.Three
D.Four
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32. The term homologous chromosomes
A.refers to replications of the same chromosome
B.is another name for sister chromatids
C.must be haploid
D.means a pair of chromosomes of the same kind, such as sex chromosomes
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33. At the center of the cell cycle control system is Cdk, a protein that
A.is phosphorylated to become active
B.binds to different cyclins
C.is only active during mitosis
D.manufactures growth factors
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34.  Each chromosome contains two chromatids by the end of the __________ phase in the life cycle of a human cell.
A.C
B.G2
C.M
D.S
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35. Which of the following is the primary growth phase of a cell?
A.G1
B.G2
C.M
D.G0
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