________ Proteins Extend All the Way Across the Cell Membrane

question 131

Multiple Choice

________ proteins extend all the way across the cell membrane.

• A) Nuclear
• B) Transmembrane
• C) Cytoskeletal
• D) Peripheral
• E) Glycolipid

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Definitions:

Cortex

The outer layer of an organ or structure, such as the brain’s cortex involved in many higher-level brain functions, or the cortex of plants responsible for storage and transport.

Pericycle

A layer of cells in plant roots that can give rise to lateral roots and is involved in secondary growth.

Endodermis

The innermost layer of cells in the cortex of a plant root, functioning as a selective barrier that regulates the passage of substances from the soil into the vascular system.

Stele

The central part of a root or stem containing the vascular tissue of xylem and phloem, responsible for the transport of water and nutrients.