What kind of selection did the humans use to create dogs and all the tasty plants we eat )?
Why are there no longer any brown polar bears?
The polar bear has evolved over time from the common brown bear by changing its fur colour to white, the ideal colour to blend in with its ice-covered surroundings. With new data an international research team now documents that the separation from the brown bear into an independent species has gone very quickly.
How many years ago did wolves begin to evolve into dogs?
What is the name of the protein that helps move things around a cell?
How do cells move?
Cell movement is a complex phenomenon primarily driven by the actin network beneath the cell membrane, and can be divided into three general components: protrusion of the leading edge of the cell, adhesion of the leading edge and deadhesion at the cell body and rear, and cytoskeletal contraction to pull the cell …
How are proteins transported?
Protein cargo moves from the ER to the Golgi, is modified within the Golgi, and is then sent to various destinations in the cell, including the lysosomes and the cell surface. The Golgi processes proteins made by the endoplasmic reticulum (ER) before sending them out to the cell.
Where is the protein made?
Where are proteins assembled?
Where are proteins Synthesised inside the cell how are they transported?
Translation is the process of protein synthesis from mRNA. Protein synthesis occurs in the cytoplasm where ribosomes play a major role. The mRNAs synthesized in nucleus gets transported to the cytoplasm where protein synthesis takes place.
What two cells work together in protein synthesis?
The two cell structures that are involved in protein synthesis are the ribosome and the endoplasmic reticulum.
How is a protein shipped from a cell?
Vesicles transport the proteins from the ribosomes to the Golgi apparatus, a.k.a Golgi complex, where they are packaged into new vesicles. The vesicles migrate to the membrane and release their protein to the outside of the cell. Lysosomes digest and recycle the waste materials for reuse by the cell.
How does DNA become a protein?
During transcription, the enzyme RNA polymerase (green) uses DNA as a template to produce a pre-mRNA transcript (pink). The pre-mRNA is processed to form a mature mRNA molecule that can be translated to build the protein molecule (polypeptide) encoded by the original gene.
What is protein made of?
What Are Proteins Made Of? The building blocks of proteins are amino acids, which are small organic molecules that consist of an alpha (central) carbon atom linked to an amino group, a carboxyl group, a hydrogen atom, and a variable component called a side chain (see below).
Why are proteins so important to living organisms?
Protein is a nutrient your body needs to grow, as well as to support and maintain your life. For example, proteins help cells develop and communicate, act as enzymes and hormones, conduct the transport of nutrients throughout your bloodstream and repair damaged tissue. In other words, you can’t live without protein.
What are the 3 stages of transcription?
Transcription takes place in three steps: initiation, elongation, and termination. The steps are illustrated in Figure 2.