Chapter 4 Flashcards
What theory states All organisms are composed of one or more cells.Cells are the basic living unit of structure and function in organisms and All cells come only from other cells.’
Cell Theory
Factors affecting the quality of the image
Magnification, Resolution, and Contrast
What are surface appendages that allow a bacterium to stick to a surface?
Fimbriae
What is the function of a bacterium’s capsule?
Protection
Where is a bacterial cell’s DNA found?
nucleoid region
In a bacterium, where are proteins synthesized?
Ribosomes
What name is given to the rigid structure, found outside the plasma membrane, that surrounds and supports the bacterial cell?
Cell Wall
What is the bacterial structure that acts as a selective barrier, allowing nutrients to enter the cell and wastes to leave the cell.
Plasma Membrane
Which organelle plays a role in intracellular digestion?
Lysosome
Which of the following correctly matches an organelle with its function? mitochondrion … photosynthesis central vacuole … storage lysosome … movement ribosome … manufacture of lipids nucleus … cellular respiration
Central Vacuole
Which of the following may be found in eukaryotic cells, but not in bacteria?
endoplasmic reticulum
Which one of the following statements about the endomembrane system is correct? Most of the phospholipids of the endomembrane system are synthesized in the mitochondria. The endoplasmic reticulum is continuous with the plasma membrane. Mitochondria function in the modification and sorting of lipids and proteins. Proteins that will be secreted from the cell are likely to be found in closed spaces bounded by membranes of the endomembrane system. Ribosomes move lipids and proteins among the different organelles of the endomembrane system.
Proteins that will be secreted from the cell are likely to be found in closed spaces bounded by membranes of the endomembrane system.
The volume enclosed by the plasma membrane of plant cells is often much larger than the corresponding volume in animal cells. The most reasonable explanation for this observation is that? animal cells are spherical, whereas plant cells are elongated. plant cells are capable of having a much higher surface-to-volume ratio than animal cells. plant cells have a much more highly convoluted (folded) plasma membrane than animal cells. plant cells contain a large vacuole that reduces the volume of the cytoplasm.
plant cells contain a large vacuole that reduces the volume of the cytoplasm.
What is a Cytoskeleton?
is a dynamic network of fibers that can be quickly dismantled and reassembled to change cell shape and the position of cell components
Cyanide binds to at least one molecule involved in producing ATP. If a cell is exposed to cyanide, most of the cyanide will be found within the __________.
Mitochondria
Which of the following will be found in nearly all eukaryotic cells? chloroplast capsule nucleoid mitochondria cell wall
Mitochondria
Which of the following clues would tell you if a cell is prokaryotic or eukaryotic? whether or not the cell contains DNA the presence or absence of ribosomes the presence or absence of a rigid cell wall whether or not the cell is partitioned by internal membranes whether or not the cell carries out cellular metabolism
whether or not the cell is partitioned by internal membranes
A cell has formed a food vacuole as it ingested a food particle. Which of the following events is associated with the breakdown of that food particle? Enzymes for the breakdown of the food are delivered to the food vacuole from the cytosol. Proteins for digestion of the food are made by ribosomes in the Golgi apparatus. The membrane of the food vacuole is derived from the cell wall. Proteins for digestion of the food particle were initially processed in mitochondria. Digestion of the food particle occurs in a vesicle enclosed by a membrane that separates the digestion from the cytoplasm.
Digestion of the food particle occurs in a vesicle enclosed by a membrane that separates the digestion from the cytoplasm.
Which of the following statements concerning cells of bacteria and archaea is correct? DNA is present in both archaea and bacteria. Archaea contain small membrane-enclosed organelles; bacteria do not. DNA is present in the mitochondria of both bacteria and archaea. Archaea contain a membrane-bound nucleus; bacteria do not.
DNA is present in both archaea and bacteria.
What are plasmodesmata?
Openings in the cell wall that allow things to enter and leave
What are the parts present in animal cells absent in plant cells?
Centrosomes and Lysosomes
What are the parts present in plant cells absent in animal cells?
Chloroplast and Cell wall
What are the parts present in both prokaryotic and eukaryotic cells?
Plasma Membrane, DNA, and Ribosomes
Which parts are always present in bacteria?
Nucleoid, Ribosomes, and Plasma Membrane
