Molecules always tend to move downhill i.e, from higher concentration to lower concentration, but if a molecule has to move uphill i.e towards higher concentration then energy has to be spent.
Active transport requires energy in the form of ATP i.e. ATP must break down for the movement of molecule against its concentration gradient. (ans is A)
The two main components of the extracellular matrix are Elastin and Collagen.
The extracellular matrix is an intricate macromolecular network that is found in the extracellular space. The matrix is composed of polysaccharides and very diverse proteins, locally secreted and assembled forming a complex network that surrounds the cells. The matrix is highly developed in connective tissue and its derivatives. The extracellular matrix is formed mainly by proteins, glycosaminoglycans,proteoglycans and glycoproteins, organized in diverse networks that constitute the different tissues. <em>The most abundant proteins are collagen and elastin.</em>
Collagen is a family of very abundant proteins in the body of animals. Collagen molecules can represent 25 to 30 % of all body proteins. Its main mission in the tissues is to form a framework that supports the tissues and that resists the forces of mechanical tension.
The elastin molecules are very close to each other through links between the regions rich in the amino acid lysine. It is an abundant protein in may extracellular matrices and appears as a component of the so called elastic fibers, which are onsoluble aggregates of proteins.
Answer:
Gqalpha.
Explanation:
The signalling processing occurs in the brain with the helps of different receptors, proteins and hormones. These receptors determines the taste sensation, visual and hearing sensation as well.
In case of the increase in the level of the diacylglycerol, the Gqalpha trimeric G protein bounds to the GTP. This subunit helps in the hydrolysis of phosphatidylinositol 4,5-bisphosphate (PIP2) to diacyl glycerol (DAG) and inositol trisphosphate (IP3) by activating the enzyme known as phospholipase C.
Thus, the answer is Gqalpha.
Answer:
What are the parts of female reproductive system and its function?
The female reproductive system includes the ovaries, fallopian tubes, uterus, vagina, vulva, mammary glands and breasts. These organs are involved in the production and transportation of gametes and the production of sex hormones.
Explanation: