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Other ways that substances can cross the plasma membrane include facilitated transport, where molecules or ions must interact with a channel/carrier protein to be transported across the membrane, down a c...

Initally, the rate of reaction is able to increase as concentration does because at this point, not all enzymes active sites are occupied. Therefore, by adding more substrate, a higher percentage of enzym...

Transcription factors together with enzymes such as DNA topoisomerase and DNA helicase reach the gene of interest. These enzymes uncoil the DNA and revelea the two strands of DNA that are wrapped around h...

ATP, which stands for adenosine triphosphate, is a biomolecule formed by a purine base (adenine), a sugar molecule (ribose) and three phosphate groups. Its main function is to store energy within the cell...

The differences in the birds' beaks are due to evolution and natural selection. One island may have an abundance of seeds and nuts which require a large beak to crack them open, meaning that birds with a ...