Form I is found in most autotrophic organisms. Contributing up to 50% of soluble leaf protein, it is the predominant protein in plant leaves.

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#Id: 5629

#Unit 7. System Physiology – Animal

The sensory receptors for vision are photoreceptors, located on the retina.

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#Id: 7433

#Unit 5. Developmental Biology

Once all proteins are functioning, a few starving cells start to emit cAMP pulses.

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#Id: 2302

#Unit 3. Fundamental Processes

As RNA polymerase moves along the DNA template, it unwinds the duplex at the front of the bubble (the unwinding point), and the DNA automatically reforms the double helix at the back (the rewinding point). 

1. The length of the transcription bubble is 12 to 14 bp, but the length of the RNA–DNA hybrid within the bubble is only 8 to 9 bp. 

2. As the enzyme moves along the template, the DNA duplex reforms, and the RNA is displaced as a free polynucleotide chain. 

3. The last 14 ribonucleotides in the growing RNA are complexed with the DNA and/or the enzyme at any given moment.

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#Id: 3670

#Unit 3. Fundamental Processes

mRNAs containing multiple ORFs are known as polycistronic mRNAs, and those encoding a single ORF are known as monocistronic mRNAs.

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#Id: 10303

#Unit 4. Cell Communication and Cell Signaling

T-cell costimulatory