Which of the following statements about the cell cycle is TRUE?   a. The protein APC blocks cells from entering anaphase   b. CDKs are degraded after each cell cycle phase by the addition of a ubiquitin chain to the proteins   c. A kinase is a protein that adds a ubiquitin chain to other proteins Cyclin activity is necessary, but not always sufficient, for CDK activation   d. Cyclin proteins must be degraded before Cdk proteins can be activated

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Which of the following statements about the cell cycle is TRUE?

 

a. The protein APC blocks cells from entering anaphase

 

b. CDKs are degraded after each cell cycle phase by the addition of a ubiquitin chain to the proteins

 

c. A kinase is a protein that adds a ubiquitin chain to other proteins Cyclin activity is necessary, but not always sufficient, for CDK activation

 

d. Cyclin proteins must be degraded before Cdk proteins can be activated

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