Search results for: 'Mechanisms for chromosome movement Animation'

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By: HWC, Views: 6434

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: 5523

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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Predator- prey competition and symbiosis

By: HWC, Views: 9491

Predator-prey relationships occur when one species, the predator, kills and eats an organism of another species, the prey. This graph shows the cyclical nature of predator-prey relationships, in this case among populations of Canada lynx and snowshoe rabbits. If predation is without some li...

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Phases of an Action Potential - Resting Potential, Threshold, Rising, Falling, & Recovery Phases

By: HWC, Views: 9082

In this tutorial, we will review the phases of an action potential measured from a small area of a neuron's membrane. The action potential can be divided into five phases: the resting potential, threshold, the rising phase, the falling phase, and the recovery phase. When the neuron is at rest,...

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Lung Sounds Animation (1 of 5)

By: Administrator, Views: 331

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: 12485

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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Red alga life cycle Animation

By: HWC, Views: 3882

Life cycle of Porphyra. The most conspicuous part of this algal life cycle is the haploid gametophyte. This sheetlike form is collected and dried for use as nori, the wrapping for sushi. Gametes form in packets interspersed between vegetative cells near the sheet margins. The gamet...

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Protein Secondary and Tertiary Structures - Animation

By: HWC, Views: 5801

Amino acid sequence dictates a protein's final shape. The presence of certain amino acids favors a pattern of hydrogen bonding that causes part of the polypeptide chain to coil and twist into an alpha helix. The presence of other amino acids enables hydrogen bonding between strand like r...

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Energy inputs and release in glycolysis Animation

By: HWC, Views: 3512

Glycolysis breaks the six-carbon sugar glucose into two three-carbon molecules of pyruvate. The first steps of glycolysis require an energy input in the form of two phosphate-group transfers from ATP. These phosphorylations raise the energy level of glucose enough to allow the energy-releas...

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