Search results for: 'Trp operon Animation'

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Random alignment at Metaphase I Animation

By: HWC, Views: 481

Possible outcomes of random alignment at metaphase I. In this example, three types of chromosomes are labeled 1, 2, and 3. Maternal chromosomes are dark blue; paternal ones are light blue. Suppose that at metaphase I all the maternal chromosomes became attached to one spindle pole and all the ...

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The Nerve Impulse

By: Administrator, Views: 11228

The action potential explained.

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Anatomy and Chemical Makeup of a Single Hair (Animation)

By: HWC, Views: 4932

The hair's outer cuticle surrounds hair cells filled with tough keratin macrofibrils. Each macrofibril consists of smaller microfibrils. A microfibril is made up of three keratin polypeptide chains. The chains are linked together by disulfide bonds. A hair consists of keratin chains held...

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Chemical Synapse Animation

By: HWC, Views: 4016

A neuromuscular junction is a chemical synapse between the axon endings of a motor neuron and a muscle cell. A narrow synaptic cleft separates the presynaptic cell (the motor neuron) from the postsynaptic cell (the muscle cell). The presynaptic cell contains vesicles filled with neurotransmitt...

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Digestion Animation

By: Administrator, Views: 10269

The mouth or oral cavity is formed by: - The hard and soft palates at the top or roof - the cheeks - the tongue - the lips Contains the teeth and salivary glands. The gingivae (gums) surround the necks of the teeth. The lingual frenulum is a thin fold of mucous membrane that connects...

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Chemical Messengers Animation

By: Administrator, Views: 10166

Three types of chemical messengers.

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Green alga life cycle Animation

By: HWC, Views: 1258

Chlamydomonas zoospores are haploid flagellated cells. As long as conditions are favorable, these cells reproduce asexually. As many as sixteen cells may form by mitosis within a parent cell. Daughter cells escape when the cell wall ruptures. When conditions become less favorable, the...

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DNA close up Animation

By: HWC, Views: 544

A section from a DNA double helix The backbone of each DNA strand consists of alternating deoxyribose sugars and phosphate groups. The two strands run in opposite directions. One runs from the 5' to 3' direction, the other in the 3' to 5' direction. Think of the deoxyribose units o...

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Virtual Tour of the Heart

By: Administrator, Views: 9517

Everything you need to know about your heart

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