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Related Concept Videos

Feedback Inhibition00:46

Feedback Inhibition

Biochemical reactions are occurring constantly in cells, converting starting substances to different products, usually with the help of enzymes that speed the reactions. Without enzymes, it would take far too long for most reactions to occur to be useful to the cell!
Feedback Loops01:01

Feedback Loops

In most cases, excessive hormone production is prevented by negative feedback—a loop that starts with a stimulus inducing the release of a particular substance, like a hormone, to maintain a certain level before triggering a signal that results in a decrease in further release of the hormone.
Proofreading01:43

Proofreading

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Proofreading01:31

Proofreading

Synthesis of new DNA molecules is carried out by the enzyme DNA polymerase, which adds nucleotides on the daughter strand complementary to the template DNA strand. DNA polymerase has a higher affinity to add the correct base and ensures fidelity during DNA replication. Furthermore,  it exhibits proofreading activity during replication, using an exonuclease domain that cuts off incorrect nucleotides from the nascent DNA strand.
Errors During Replication are Corrected by the DNA Polymerase Enzyme
Allergic Reactions02:06

Allergic Reactions

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Contact-dependent Signaling01:19

Contact-dependent Signaling

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Gap Junctions
In animal cells, gap junctions are formed...

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Related Experiment Video

Updated: May 9, 2026

Light/dark Transition Test for Mice
10:35

Light/dark Transition Test for Mice

Published on: November 13, 2006

Authors' reply

Amit K Dinda

    Saudi Journal of Kidney Diseases and Transplantation : an Official Publication of the Saudi Center for Organ Transplantation, Saudi Arabia
    |July 23, 2013
    PubMed
    Summary

    No abstract available in PubMed .

    Related Experiment Videos

    Last Updated: May 9, 2026

    Light/dark Transition Test for Mice
    10:35

    Light/dark Transition Test for Mice

    Published on: November 13, 2006