Which of the following is able to phosphorylate target proteins and facilitate progress through the cell cycle: O A cyclin alone O A CDK alone O A complex of a cyclin and a CDK O A steroid hormone receptor O The signal recognition particle
Which of the following is able to phosphorylate target proteins and facilitate progress through the cell cycle: O A cyclin alone O A CDK alone O A complex of a cyclin and a CDK O A steroid hormone receptor O The signal recognition particle
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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Transcribed Image Text:**Question:**
Which of the following is able to phosphorylate target proteins and facilitate progress through the cell cycle:
- A cyclin alone
- A CDK alone
- A complex of a cyclin and a CDK
- A steroid hormone receptor
- The signal recognition particle
**Explanation:**
The question is a multiple-choice question pertaining to cell cycle regulation. The focus is on identifying which components are responsible for phosphorylating proteins, a critical process in regulating the cell cycle.
Cyclins are proteins that regulate the cell cycle by activating cyclin-dependent kinases (CDKs) which are crucial for cell cycle progression. A CDK alone does not have catalytic activity without binding to a cyclin. Therefore, the correct answer is a complex of a cyclin and a CDK.
Other options, such as a steroid hormone receptor and the signal recognition particle, are not directly involved in cell cycle regulation through phosphorylation.
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