DP1 Term 1 revision

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Selectively permeable

Back

A term describing a membrane that allows some substances to pass while blocking others.

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Role of cholesterol in the plasma membrane

Back

Cholesterol maintains membrane fluidity, allowing for flexibility and stability.

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Monomer of carbohydrates

Back

Monosaccharides are the simplest form of carbohydrates, serving as building blocks for more complex sugars.

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Double membrane

Back

A structure that is surrounded by two lipid bilayers, commonly found in organelles like the nucleus and mitochondria.

Front

70S ribosomes

Back

Ribosomes found in prokaryotic cells and in mitochondria and chloroplasts of eukaryotic cells, smaller than 80S ribosomes.

Front

Peptide bonds

Back

Covalent bonds that link amino acids together in proteins, formed through a dehydration reaction.

Front

Impermeable membrane

Back

A membrane that does not allow any substances to pass through.

Front

Permeable membrane

Back

A membrane that allows all substances to pass through freely.

Front

Active transport

Back

The movement of substances across a membrane against their concentration gradient, requiring energy.

Front

Fluid mosaic model

Back

A model that describes the structure of cell membranes as a mosaic of various components, including phospholipids, cholesterol, and proteins.