The Compounds in Biological Membranes That Form a Barrier to the Movement

question 35

Multiple Choice

The compounds in biological membranes that form a barrier to the movement of materials across the membrane are:

• A)internal proteins.
• B)carbohydrates.
• C)lipids.
• D)nucleic acids.
• E)external proteins.

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Definitions:

Discharge

The volume of fluid passing a point within a given time, commonly used in reference to the flow of rivers and streams.

Sediment Load

The total volume or mass of sediment that is being transported by a stream, river, or other fluid flow systems.

Sediment

Particles or fragments of rock, minerals, or organic matter that have been transported and deposited by wind, water, or ice.

Stream

A body of water flowing in a channel or bed, usually freshwater and moving towards a river, lake, sea, or another stream.