In Early Experiments to Understand the Control of the Cell

question 72

Multiple Choice

In early experiments to understand the control of the cell cycle, researchers fused HeLa cells that were at different stages of the cell cycle. What did the results of these experiments suggest? ​

• A)The concentrations of cyclin dependent kinases (Cdks)fluctuate throughout the cell cycle.
• B)The concentrations of cyclins fluctuate throughout the cell cycle.
• C)The cell cycle has three checkpoints through which the cell must pass in order to progress through to mitosis.
• D)Microtubules play an essential role in the progression of the cell cycle.
• E)Molecules in the cytoplasm control the progression of the cell cycle.

---

Definitions:

RNA Polymerase

An enzyme responsible for copying a DNA sequence into an RNA sequence, during the process of transcription.

Promoter Sequence

A promoter sequence is a region of DNA that initiates transcription of a particular gene, controlling gene expression.

PAX6 Gene

A gene crucial for the development of the eyes, brain, and pancreas in mammals, mutations in which can lead to various eye disorders.

Eyeless Mutant

A type of mutation, often studied in genetic research, that results in the absence of eyes in organisms due to specific genetic alterations.