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what is intercellular communication explain brieflyboth plant and animal cells have developed means of communication between cells in animals
what is plastidsthe most obvious difference between plant cells and other eukaryotic cells is that cells of most plants contain unique organelles
explain the structure of intermediate filamentsintermediate filaments about 8 to 10 nm in diameter are so named because they are intermediate in size
explain the term microfilaments microfilaments are fine fibrils only 7 nm in diameter composed of a protein called actin actin is one of the two
explain the term intracellular filamentsintracellular filaments the cell contains fibrous proteins which serve to give the cell its shape and
what is lysosomeslysosomes animal and fungal cells contain membrane-bound organelles called lysosomes which are filled with digestive
what is microbodies microbodies microbodies are formed by pinching off of vesicles from rough endoplasmic reticulum they are not found in every
what is organellesorganelles eukaryotic cells contain various membrane-bound structures called organelles in contrast to prokaryotes which lack
what is passive transportpassive transport specialized proteins called permeases also move specific substances across the cell membrane in a
explain the term active transportactive transport at intervals protein assemblies involved in selective or active transport of materials are
explain diffusion and osmosis in cell structurediffusion and osmosis diffusion through a cell membrane occurs as it does elsewhere from an area
explain the differance between pinocytosis and phagocytosispinocytosis and phagocytosis the cell membrane occasionally invaginates or indents to
explain the different types of cells in cell structure types of cells cells can be classified as being either prokaryotic or eukaryotic
what is protein synthesisprotein synthesis protein synthesis begins in the nucleus with the formation of mrna from a dna template through
what is rnarna is a single-stranded molecule which has as its 5-carbon sugar ribose instead of the deoxyribose found in dna also uracil is
explain what is dnadna dna is the source of the information that directs the development of the cell although all segments of dna are not active in
explain briefly nucleic acids dna amp rnanucleic acids dna amp rna nucleic acids are the molecules that contain genetic information that is
explain the various types of protein structureprotein structure the structure of proteins can be examined at four levels of increasing
elaborate proteinsproteins proteins are the primary constituents of most living cells proteins are important components of cell membranes and
explain other lipids in biological compoundother lipids another important type of lipids are the steroids with a basic structure consisting of
what is phospholipids phospholipids phospholipids are similar to triglycerides except that they contain only two fatty acid and one or both of
explain fats in biological compoundfats monoglycerides diglycerides and triglycerides are fats consisting of a backbone of the alcohol molecule
explain lipidslipids lipids function as energy-storing molecules such as fats and oils protective waxes digestive tract lubricants heat insulation
what is carbohydratescarbohydrates carbohydrates function mainly as immediate sources of energy stored energy such as starch and structural
explain the compound waterwater water is the most important compound in living cells making up most of the bulk of living organisms our own