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-
The answer is septic systems, agricultural chemicals, <span>leaking of landfills.
</span>
<span>Groundwater is a water under the surface of the
Earth. It is widely used as a source of freshwater. Thanks to
its underground position, it is not as much vulnerable to pollution such as surface
water. However, some leaking of landfills, septic systems and agricultural
chemicals that can reach it deep down under the surface can cause groundwater
pollution.</span>
Answer: The question is not complete as options are not complete , the remain part are;
A. 3.7 years, photosynthetic bacteria.
B. 3.7 years cyanobacteria.
The correct option is
3.7 billion years old, cyanobacteria and stromatolite.
Explanation:
This is because cyanobacteria is the oldest fossil to exist and they have been in existence for about 3. 7 billion years. These cyanobacteria photosynthesized because they have thread like chlorophyll filament, they produce food through the process of photosynthesis which is needed for their survival and they release oxygen as bye product.
This is because it is the code language that tRNA uses during the process of translation.
In the cell, DNA has the genetic code for proteins needed for the cell to be able to function. To be able to make a particular protein, the code for that protein, which can be compared to a blue print has to be delivered from the DNA to the ribosome which can be compared to a work shop for it is here that amino acids, the building blocks of protein, are put together to form the protein.
In the cell nucleus, DNA transcribes (copies) the blue print on to mRNA, which then leaves the nucleus and carries the blue print to the ribosomes in the cell cytoplasm and attaches to a ribosome. tRNA begins to translate or read the information on the attached mRNA in triplets or codons and not as single nucleotides. Each codon is a code for a specific amino acid. tRNA then fetches amino acids (coded for by each codon) from the pool of free amino acids in the cytoplasm and brings them to the ribosome where they are joined to each other to form a chain thus creating the protein.