Which of the Following Statements About Cell Signaling Is CORRECT

question 144

Multiple Choice

Which of the following statements about cell signaling is CORRECT?

• A)Signaling pathways and the molecules involved (e.g., kinases)evolved before the evolutionary split between plants and animals and thus are similar in the two groups.
• B)Molecular mechanisms for signaling between cells exist in complex multicellular organisms, but not single-celled eukaryotes.
• C)All animals have gap junctions to allow targeted signaling between cells.
• D)Signaling molecules are generally polysaccharides that activate receptors on target cells and activate or repress gene expression.
• E)Only cells on the exterior surface of an organism have receptors to detect environmental signals.

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Definitions:

Sense of Control

The perception of having influence over the events in one's life, contributing to psychological well-being.

Principle of Conservation

A concept in child development discovered by Jean Piaget that states children learn that quantities remain consistent despite changes in their shape or arrangement.

Deduction

The logical process of deriving specific conclusions from general principles or premises.

Attachment

The emotional bond that forms between an individual, typically an infant, and another person, often a caregiver, which is critical for personal development.