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
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.
Which of these cell junctions form a barrier to the passage of materials?
desmosomes (anchoring junctions)
tight junctions
keratin fibers
plasmodesmata
gap (communicating) junctions
The primary role of _____ is to bind animal cells together.
desmosomes
gap (communicating) junctions
plasmodesmata
the cytoskeleton
tight junctions
_____ aid in the coordination of the activities of adjacent animal cells.
Gap (communicating) junctions
Tight junctions
Desmosomes
Plasmodesmata
Keratin fibers
