BSC 1010C Ch6 HW

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.

_____ aid in the coordination of the activities of adjacent animal cells. Gap (communicating) junctions Tight junctions Desmosomes Plasmodesmata Keratin fibers

Gap (communicating) junctions

The primary role of _____ is to bind animal cells together. desmosomes gap (communicating) junctions plasmodesmata the cytoskeleton tight junctions

desmosomes

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

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