Biology 101

DNA is not a major component of the plasma membrane.

Ribosomes are created in the nucleolus which is inside of the nucleus.

The rough endoplasmic reticulum is the area in a cell where proteins are synthesized.

The chloroplast functions in photosynthesis.

Cell membranes are made of two phospholipid layers called a bilayer.

the nucleus is surrounded by a double layer membrane called the nuclear envelope.

Not all substances can cross the cell membrane, for this reason the cell membrane is said to be selectively permeable.

The cell organelle that process and packages for export substances produced by the cell is the Golgi apparatus.

The cell organelle that digests molecules, old organelles and foreign substances is the lysosomes.

Organelle involved in the synthesis of steroids in glands and the break down of toxic waste is the smooth ER.

The part of the cell that regulates movement of substances into and out of the cell is the cell membrane.

Cells that have high energy requirement generally have many mitochondria.

Suspended in the eukaryotic cell's cytosol are tiny organelles.

Organelle that transfers energy from organic compounds to ATP are mitochondria.

Organelle that converts sunlight, carbon dioxide, and water into sugars are chloroplasts.

The fluid mosaic model presents the modern view of a membrane's structure.

"All matter consists of at least one cell" is not a principle of the cell theory.

A cell membrane is a thin layer of lipid and protein.

Immerse a living cell in a hypotonic solution, and water will tend to diffuse into the cell.

Sodium ions cross a membrane at transport proteins that receive an energy boost. This is a case of active transport.

The phospholipids let hydrophobic and small molecules through (passive transport) but not all molecules. This is important because it acts as a filter for some or all of the solvents such as filtering out salt but allowing the smaller sugar molecules to pass though.

Works Cited

Capbell, NA., Simon, EJ., Reece, JB., & Dickely, JL.

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