Search results for: 'Presumed evolutionary branchings in the primate family tree Animation.'

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By: HWC, Views: 4697

DNA fingerprinting enables a scientist to compare the DNA from two biological samples, such as a blood stain and a suspect's blood. A restriction enzyme is added to the samples to be compared. The enzyme cuts the DNA into smaller fragments. The DNA fragments are placed on an electrophor...

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Body plan of euglena Animation

By: HWC, Views: 2068

Euglenoids are single-celled organisms that live in lakes and ponds. A contractile vacuole pumps out the water that diffuses into the cell from its hypotonic surroundings. The body is covered by a translucent pellicle composed of flexible strips of a protein-rich material. Light passe...

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Condensation and Hydrolysis Animation

By: HWC, Views: 1581

A condensation reaction joins two molecules together to form one larger molecule. An enzyme removes a hydroxyl group from one molecule and a hydrogen atom from another, then speeds the formation of a bond between the two molecules at their exposed sites. Typically the discarded atoms join t...

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Photosynthesis overview Animation

By: HWC, Views: 1806

Illustration of the interrelationships of the light-dependent and light-independent reactions of photosynthesis. The light-dependent reactions split water, and produce ATP and NADPH. Oxygen is a by-product of these reactions. ATP and NADPH, together with carbon dioxide, are reactants in ...

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Complement Proteins Animation

By: HWC, Views: 4507

Formation of membrane attack complexes. Complement proteins can activate when they bind to antibodies that are bound to a pathogen. Complement proteins also activate when they bind directly to bacterial surfaces. Cascading reactions yield huge numbers of different types of complement protei...

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The 4 steps of translation Animation

By: HWC, Views: 3567

Translation is the process of formation of a polypeptide chain according to codon present in mRNA. The four steps of translation are: Activation or charging of tRNA Initiation – recognition of start codon, binding of ribosomal subunits to mRNA and formation of initiation complex with Met-tR...

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Genetic terms Animation

By: HWC, Views: 2126

Diploid organisms have pairs of genes, on pairs of homologous chromosomes. Each gene has a specific location on the chromosome. We call this the gene's locus. In this species, the locus for gene B is always between the loci for genes A and C. Most genes come in two or more slightly differen...

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Lung Sounds Animation (1 of 5)

By: Administrator, Views: 293

83_cr_aRespiratory rates for some different age groups: Newborn 30 – 80/min 1st year 20 – 40/min 5th year 20 – 25/min 15th year 15 – 20/min Adult 12 – 20/min

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Blood Flow Through the Kidneys

By: Administrator, Views: 10569

Purplish-brown, bean-shaped organs located behind abdominal cavity (retroperitoneal area) on either side of spine, between thoracic vertebrae and lumbar region.

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