Answer:
Differentiated cells have retained all their genetic potential
Explanation:
Differentiated cells are important in a multicellular organism because they are able to perform a specialised function in the body. Multicellular organisms must therefore retain some unspecialised cells that can replenish cells when needed. These unspecialised cells are called stem cells.
Answer:
Protein synthesis consists of a series of steps ranging from the transcription of DNA to messenger RNA (mRNA), to the coupling of this to transfer RNA (tRNA) and ribosomes to produce polypeptide chains by the addition of amino acids.
Explanation:
DNA is a molecule present in the nucleus of the cell, formed by a double <u>complementary strand</u> that is linked by specific sequences of nitrogenous <u>base pairs</u>. This sequential order contains the organized genetic information of a species.
- The first step in protein synthesis occurs in the nucleus, through the transcription of DNA into mRNA, in which a single strand of mRNA is formed from the sequence of nitrogenous bases, with the help of the enzyme RNA polymerase. This transcription also includes the synthesis of <u>tRNA</u> and ribosomal RNA. Transcription occurs in the 5' → 3' direction of the DNA strand.
- Once the different RNA molecules have been synthesized, the next step occurs in the cell's cytoplasm, with the binding of the mRNA to the minor subunit of the ribosome. In the sequence of nitrogenous bases in mRNA, a triplet of bases is called a <u>codon</u> -the base of the genetic code- each of which will encode a specific <u>amino acid</u>.
- To the complex formed by mRNA and minor subunit of the ribosome a tRNA is coupled, which contains the <u>anticodon</u> that determines this coupling, in addition to the amino acid it encodes. This is the moment when the major subunit of the ribosome is attached and protein synthesis begins.
Each of the amino acids will be linked to others by peptide bonds -following the sequence of codons in the RNA- until synthesis stops with the appearance of the stop codons.
Primary Succession Gradual growth of organisms in an area that was previously bare, such as rock. (For example lichens, mosses, and ferns will first appear on bare rock). The Following Steps: Secondary Succesion It is the series of community changes which take place on a previously colonized, but disturbed or damaged habitat, (examples include areas which have been cleared of existing vegetaion such as a tree-felling in a woodland). Primary succession occurs following an opening of a pristine habitat, for example, a lava flow, an area left from retreated glacier, or abandoned strip mine.
In contrast, secondary succession is a response to a disturbance, for example, forest fire, tsunami, flood, or an abandoned field. Compare && Contrast Primary Succession starts at bare rock. Secondary Succession starts with soil and dirt already there. Secondary Succession takes 100 +(plus) years to develop. Primary Succession takes thousands of years to develop.
<h2><em><u>B</u></em></h2>
boi what class are you in
Membrane functions are important for transporting substances across the cell membrane
