DNA polymerase “grips” the template and the incoming nucleotide when a correct base pair is made via Arg, Lys and Tyr residue in its alpha helix

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#Id: 939

#Unit 5. Developmental Biology

In drosophila, the stem cells for sperm reside in a regulatory microenvironment called the hub.

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#Id: 5880

#Unit 10. Ecological Principles

Without some type of greenhouse effect, global temperatures would be much lower than they are, perhaps averaging only –17°C compared with the existing average of +15°C.

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#Id: 5729

#Unit 10. Ecological Principles

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#Id: 8563

#Unit 1. Molecules and their Interaction Relevant to Biology

Substrate-binding could cause a conformational change to take place in the enzyme and reveal an inhibitor binding site, or the inhibitor could bind directly to the enzyme-bound substrate. 

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#Id: 3244

#Unit 3. Fundamental Processes

DNA also undergoes depurination by spontaneous hydrolysis of the N-glycosyl linkage, and this produces an abasic site (i.e., deoxyribose lacking a base) in the DNA.