At the G₁-To-S Checkpoint, One of the Cyclins Has Reached

question 79

Multiple Choice

At the G₁-to-S checkpoint, one of the cyclins has reached a concentration great enough to complex with one of the CDKs to initiate DNA synthesis. Which cyclin and which CDK are the ones involved?

• A)cyclin G₁/S and CDK2
• B)cyclin G₁/S and CDK1
• C)cyclin S and CDK2
• D)cyclin S and CDK1

---

Definitions:

Metabolic Rate

Metabolic rate is the rate at which the body uses energy to maintain basic bodily functions when at rest, known as the basal metabolic rate (BMR).

Exophthalmos

A condition characterized by the bulging of the eyes out of the orbit, often associated with thyroid disease, particularly Grave's disease.

Thyroid Hormone Levels

The concentration of hormones produced by the thyroid gland, which are critical for regulating metabolism, energy generation, and overall growth and development.

Thyroid-stimulating Hormone

A pituitary hormone that regulates the production of hormones by the thyroid gland, influencing metabolism, energy levels, and growth.