7.The APC protein- ----. a. is essential for degrading B-catenin. b. causes increased activation of B-catenin c. helps to regulate cell motility d. a and c e. b and c 8. Which of the following statements is NOT true of the pRb protein? a. pRb is functionally inactive when it is hyperphosphorylated. b. pRb is mostly unphosphorylated during the G0 phase of the cell cycle. c. pRb promotes growth during early Gl phase. d. RRb phosphorylation is initiated by D-type cyclins and CDK4/6. e. pRb is functionally inactivated at the R point.

Human Anatomy & Physiology (11th Edition)
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ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
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Chapter1: The Human Body: An Orientation
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7.The APC protein
----.
a. is essential for degrading B-catenin.
b. causes increased activation of B-catenin
c. helps to regulate cell motility
d. a and c
e. b and c
8. Which of the following statements is NOT true of the pRb protein?
a. pRb is functionally inactive when it is hyperphosphorylated.
b. RRb is mostly unphosphorylated during the G0 phase of the cell cycle.
c. pRb promotes growth during early G1 phase.
d. RRb phosphorylation is initiated by D-type cyclins and CDK4/6.
e. pRb is functionally inactivated at the R point.
9. In a normal cell, signals from the external environment determine whether the cell will proliferate during
what phase(s) of the cell cycle?
a. The S phase only
b. The G1 phase only
c. The G2 phase only
d. All phases of the cell cycle
Transcribed Image Text:7.The APC protein ----. a. is essential for degrading B-catenin. b. causes increased activation of B-catenin c. helps to regulate cell motility d. a and c e. b and c 8. Which of the following statements is NOT true of the pRb protein? a. pRb is functionally inactive when it is hyperphosphorylated. b. RRb is mostly unphosphorylated during the G0 phase of the cell cycle. c. pRb promotes growth during early G1 phase. d. RRb phosphorylation is initiated by D-type cyclins and CDK4/6. e. pRb is functionally inactivated at the R point. 9. In a normal cell, signals from the external environment determine whether the cell will proliferate during what phase(s) of the cell cycle? a. The S phase only b. The G1 phase only c. The G2 phase only d. All phases of the cell cycle
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