1. Testing only one variable
A controlled variable means its the one that stays the same. In a controlled experiment, it means there is only one manipulated, (changed) variable.
Answer:
DNA-binding proteins are proteins that have DNA-binding domains and thus have a specific or general affinity for single- or double-stranded DNA.[3][4][5] Sequence-specific DNA-binding proteins generally interact with the major groove of B-DNA, because it exposes more functional groups that identify a base pair. However, there are some known minor groove DNA-binding ligands such as netropsin,[6] distamycin, Hoechst 33258, pentamidine, DAPI and others.
Explanation:
here are some examples
DNA-binding proteins include transcription factors which modulate the process of transcription, various polymerizes, nucleases which cleave DNA molecules, and histones which are involved in chromosome packaging and transcription in the cell nucleus. DNA-binding proteins can incorporate such domains as the zinc finger, the helix-turn-helix, and the leucine zipper (among many others) that facilitate binding to nucleic acid. There are also more unusual examples such as transcription activator like effectors. i hope this helped -w-
Stimulated by the action of the ions on its receptors, the pump transports them in opposite directions against their concentration gradients. ... The sodium-potassium pump carries out a form of active transport—that is, its pumping of ions against their gradients requires the addition of energy from an outside source.
Answer:
Welcome to the promised follow-up to our previous examination of the digital television revolution. This week we finally take an opportunity for tortured reference to the revolution being digitized. I suppose everyone is probably making that joke. You heard it here last.
To recap the situation as seen from television-free floor 2B: there are around 275 million TVs in the U.S. These historically were cathode-ray sets receiving analog signals. All stations are to convert to digital signal by mid-June, hastening the obsolescence of analog-only CRTs, the sale of digital converter sets, and the potential change to LCD, plasma, or rear-projection televisions. Last time we learned that CRT recycling is possible and urgent, that Energy Star certifies digital converter boxes, and that Umbra thinks Jon Stewart is cute. Luckily for me I can watch his digital likeness over the internets.