The Trichromatic Theory States That

question 1

Multiple Choice

The trichromatic theory states that:

• A) the visual system treats triads of colour as antagonistic to each other.
• B) three types of colour feature detectors in the visual cortex are responsible for colour perception.
• C) three types of cones exist, each sensitive to a certain range of wavelengths.
• D) species that detect ultraviolet light perceive three colours that are outside of the range of humans.

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Definitions:

Nucleosomes

Repeating units of chromatin structure, each consisting of a length of DNA wound around a complex of eight histone molecules. Adjacent nucleosomes are connected by a DNA linker region associated with another histone protein.

Scaffolding Proteins

Nonhistone proteins that help maintain the structure of a chromosome.

Pericentriolar Material

Fibrils surrounding the centrioles in the microtubule-organizing centers in cells of animals and other organisms having centrioles.

Fibrils

Thin, elongated threads found in cells, often made of proteins, contributing to the structure and function of cells.