Which of the Following Properties Is Associated with a Cyclin-Dependent

question 61

Multiple Choice

Which of the following properties is associated with a cyclin-dependent kinase (Cdk) ?

• A) A Cdk is inactive, or "turned off", in the presence of a cyclin.
• B) The number of Cdk molecules increases during the S and G₂ phases and decrease during M.
• C) A Cdk is an enzyme that catalyses the attachment of kinetochores to microtubules.
• D) A Cdk is an enzyme that attaches phosphate groups to other proteins.

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Definitions:

Cohesion-tension

A hypothesis that explains the process of water movement up plants due to water molecules' cohesive and adhesive properties and the evaporation of water from the leaves.

Xylem

the vascular tissue in plants that conducts water and dissolved nutrients upward from the root and also helps to form the woody element in the stem.

Transpiration

Plant’s loss of water to the atmosphere, mainly through evaporation at leaf stomata.

Petioles

The stalks that join a leaf to the stem of a plant.