Plasma membrane Membranous

Serves as the boundary of the cell, maintains its integrity; protein molecules embedded in plasma. ex-receptor molecules for certain hormones, s transport mechanisms .

Endoplasmic reticulum (ER) Membranous

Network of canals and sacs extending from the nuclear envelope. Ribosomes attached to rough ER synthesize polypeptides that enter rough ER for folding and finishing, then move on to smooth ER; ER synthesizes integral membrane proteins.

Golgi apparatus Membranous

Synthesizes carbohydrate, combines it with protein, and packages the product as globules of glycoprotein.

Temporarily contain molecules for transport or later use.

Digestive enzymes break down defective cell parts (autophagy) and ingested particles; a cell’s “digestive system”; some lysosomes involved in membrane repair or secretion.

Peroxisomes Membranous

Enzymes detoxify harmful substances in the cell.

Mitochondria Membranous

Catabolism; adenosine triphosphate (ATP) synthesis; a cell’s “power plants”

Houses the genetic code, which in turn dictates protein synthesis, thereby playing an essential role in other cell activities, namely, cell transport, metabolism, and growth

Ribosomes Nonmembranous

Site of protein synthesis; a cell’s “protein factories”.

Proteasomes Nonmembranous

Destroys misfolded or otherwise abnormal proteins manufactured by the cell; a “quality control” mechanism for protein synthesis

Cytoskeleton Nonmembranous

Supporting framework of the cell and its organelles; functions in cell movement (using molecular motors); forms cell extensions (microvilli, cilia, flagella

Centrosome Nonmembranous

Acts as the microtubule-organizing center (MTOC) of the cell; centrioles assist in forming and organizing microtubules

Microvilli Nonmembranous

Tiny, fingerlike extensions that increase a cell’s absorptive surface area

Cilia and flagella Nonmembranous

Cilia move substances over the cell surface or detect changes outside the cell; flagella propel sperm cells.

Nucleolus Nonmembranous

Dense area of chromatin and related molecules within nucleus, Site of formation of ribosome subunits.

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Sara Douglass

weeks 1-6 221

Question	Answer
Plasma membrane Membranous	Serves as the boundary of the cell, maintains its integrity; protein molecules embedded in plasma. ex-receptor molecules for certain hormones, s transport mechanisms .
Endoplasmic reticulum (ER) Membranous	Network of canals and sacs extending from the nuclear envelope. Ribosomes attached to rough ER synthesize polypeptides that enter rough ER for folding and finishing, then move on to smooth ER; ER synthesizes integral membrane proteins.
Golgi apparatus Membranous	Synthesizes carbohydrate, combines it with protein, and packages the product as globules of glycoprotein.
Vesicles Membranous	Temporarily contain molecules for transport or later use.
Lysosomes Membranous	Digestive enzymes break down defective cell parts (autophagy) and ingested particles; a cell’s “digestive system”; some lysosomes involved in membrane repair or secretion.
Peroxisomes Membranous	Enzymes detoxify harmful substances in the cell.
Mitochondria Membranous	Catabolism; adenosine triphosphate (ATP) synthesis; a cell’s “power plants”
Nucleus Membranous	Houses the genetic code, which in turn dictates protein synthesis, thereby playing an essential role in other cell activities, namely, cell transport, metabolism, and growth
Ribosomes Nonmembranous	Site of protein synthesis; a cell’s “protein factories”.
Proteasomes Nonmembranous	Destroys misfolded or otherwise abnormal proteins manufactured by the cell; a “quality control” mechanism for protein synthesis
Cytoskeleton Nonmembranous	Supporting framework of the cell and its organelles; functions in cell movement (using molecular motors); forms cell extensions (microvilli, cilia, flagella
Centrosome Nonmembranous	Acts as the microtubule-organizing center (MTOC) of the cell; centrioles assist in forming and organizing microtubules
Microvilli Nonmembranous	Tiny, fingerlike extensions that increase a cell’s absorptive surface area
Cilia and flagella Nonmembranous	Cilia move substances over the cell surface or detect changes outside the cell; flagella propel sperm cells.
Nucleolus Nonmembranous	Dense area of chromatin and related molecules within nucleus, Site of formation of ribosome subunits.

Created by: user-1988304

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