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Cell Junctions BSC 1010C Ch6 HW Answers

Which of these cell junctions form a barrier to the passage of materials?
Tight junctions form a barrier that prevents fluids from moving between cells.
The primary role of _____ is to bind animal cells together.
The primary role of desmosomes (anchoring junctions) is to bind cells together.
____ aid in the coordination of the activities of adjacent animal cells
Gap junctions allow for the passage of material between cells, thus facilitating communication between these cells.

Which of the following clues would tell you if a cell is prokaryotic or eukaryotic?

whether or not the cell is partitioned by internal membranes

whether or not the cell contains DNA

whether or not the cell carries out cellular metabolism

the presence or absence of a rigid cell wall

the presence or absence of ribosomes

whether or not the cell is partitioned by internal membranes

Which of the following are common traits of chloroplasts and mitochondria?

Both are surrounded by a single membrane.

Both have their own DNA.

Both are found in plant and animal cells.

Both reproduce by meiosis.

Proteins for both are synthesized on ribosomes in the rough ER.

Both have their own DNA.

Which of these cell junctions form a barrier to the passage of materials?

desmosomes (anchoring junctions)
tight junctions
keratin fibers
plasmodesmata
gap (communicating) junctions

tight junctions

The primary role of _____ is to bind animal cells together.

desmosomes
gap (communicating) junctions
plasmodesmata
the cytoskeleton
tight junctions

desmosomes

_____ aid in the coordination of the activities of adjacent animal cells.

Gap (communicating) junctions
Tight junctions
Desmosomes
Plasmodesmata
Keratin fibers

Gap (communicating) junctions

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