All of the following are part of a prokaryotic cell except

a plasma membrane.
DNA.
ribosomes.
an endoplasmic reticulum.
a cell wall.

an endoplasmic reticulum.
ECM proteins are made by ribosomes in which part of a eukaryotic cell?

Golgi apparatus
nuclear envelope
cytoplasm
mitochondria
rough ER

rough ER
The evolution of eukaryotic cells most likely involved

anaerobic archaea taking up residence inside a larger bacterial host cell to escape toxic oxygen-the anaerobic bacterium evolved into chloroplasts.
endosymbiosis of an aerobic bacterium in a larger host cell-the endosymbiont evolved into mitochondria.
an endosymbiotic fungal cell evolved into the nucleus.
acquisition of an endomembrane system, and subsequent evolution of mitochondria from a portion of the Golgi.

endosymbiosis of an aerobic bacterium in a larger host cell-the endosymbiont evolved into mitochondria.
Which organelle or structure is absent in plant cells?
centrosomes
peroxisomes
mitochondria
Golgi vesicles
microtubules
centrosomes
Which of the following clues would tell you if a cell is prokaryotic or eukaryotic?

the presence or absence of a rigid cell wall
whether or not the cell contains DNA
whether or not the cell carries out cellular metabolism
whether or not the cell is partitioned by internal membranes
the presence or absence of ribosomes

whether or not the cell is partitioned by internal membranes
Which statement correctly describes the nuclear envelope of a eukaryotic cell?

The nuclear envelope is a single membrane, consisting of a phospholipid bilayer.
Plasmadesmosomes in the nuclear envelope permit the exchange of macromolecules between the nucleus and the cytoplasm.
All of the proteins of the cell are synthesized on ribosomes bound on the nuclear envelope.
The nuclear envelope is continuous with the endoplasmic reticulum.
The outer layer of the nuclear envelope is coated with laminin.

The nuclear envelope is continuous with the endoplasmic reticulum.
The liver is involved in detoxification of many poisons and drugs. Which of the following structures is primarily involved in this process and therefore abundant in liver cells?

smooth ER
Golgi apparatus
nuclear envelope
transport vesicles
rough ER

smooth ER
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?

Proteins for digestion of the food are made by ribosomes in the Golgi apparatus.
Digestion of the food particle occurs in a vesicle enclosed by a membrane that separates the digestion from the cytoplasm.
Proteins for digestion of the food particle were initially processed in mitochondria.
The membrane of the food vacuole is derived from the cell wall.
Enzymes for the breakdown of the food are delivered to the food vacuole from the cytosol.

Digestion of the food particle occurs in a vesicle enclosed by a membrane that separates the digestion from the cytoplasm.
Which structure is the site of the synthesis of proteins that may be exported from the cell?

plasmodesmata
free cytoplasmic ribosomes
Golgi vesicles
rough ER
lysosomes

rough ER
Which of the following contains hydrolytic enzymes?

lysosome
mitochondrion
peroxisome
vacuole
Golgi apparatus

lysosome
Which one of the following statements about the endomembrane system is correct?
Proteins that will be secreted from the cell are likely to be found in closed spaces bounded by membranes of the endomembrane system.
Which type of organelle or structure is primarily involved in the synthesis of oils, phospholipids, and steroids?

smooth endoplasmic reticulum
contractile vacuole
mitochondrion
lysosome
ribosome

smooth endoplasmic reticulum
Which plant cell organelle contains its own DNA and ribosomes? peroxisome
mitochondrion
glyoxysome
Golgi apparatus
vacuole
mitochondrion
Which type of organelle or structure is primarily involved in the synthesis of oils, phospholipids, and steroids?

smooth endoplasmic reticulum
contractile vacuole
mitochondrion
lysosome
ribosome

smooth endoplasmic reticulum
Which plant cell organelle contains its own DNA and ribosomes?

peroxisome
mitochondrion
glyoxysome
Golgi apparatus
vacuole

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

Both reproduce by meiosis.
Both have their own DNA.
Both are found in plant and animal cells.
Both are surrounded by a single membrane.
Proteins for both are synthesized on ribosomes in the rough ER.

Both have their own DNA.
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