Proteins are unbranched polymers constructed from 22 standard α-amino acids.
The protein show four levels of structural organisation; the primary structure, secondary structure, tertiary structure and quaternary structure.
The structure of proteins are stabilized by peptide bonds between the amino acid and hydrogen bond between the peptide chainds.
The primary structure of a protein is determined by the sequence of amino acids, but secondary and tertiary structures of protein define their natural or native conformation.
The solubility of protein varies according to the pH, ionic strength, nature of solvent, temperature etc.
Proteins can be classified as simple proteins or conjugated proteins on the basis of their composition.
The proteins can also be classified as fibrous proteins or globular proteins on the basis of their shape.
Proteins play a major part in body structure and function as most of the molecules like antibodies, immunoglobulins, hemoglobin, myoglobin ,most of the enzymes are proteins.
So proteins are also called building blocks of the body.
Answer:
To stay inflated, the lungs rely on a vacuum inside the chest. The diaphragm is a sheet of muscle slung underneath the lungs. When we breathe, the diaphragm contracts and relaxes. This change in air pressure means that air is 'sucked' into the lungs on inhalation and 'pushed' out of the lungs on exhalation.Explanation: hope this helps
Cancer happens when there is an alteration in the normal division and growth of the cells in the body which would commonly result in lumps or masses called tumors. In cancer, cells continue to form abnormal cells and invade other tissues of the body. T<span>elomeric</span><span /><span> stop signals are reduced and cells which normally shouldn't be dividing at a rate multiply exponentially. </span>
Answer:
Yes
Explanation:
Current evolutionary hypothesis state that all plants share a common ancestor. However, throughout time, as plants needed to colonize other habitats to survive, they were forced to develop specific adaptations, for example, the development of seeds, which enables them to be spread (by wildlife) and colonize many habitats.
However, seedless plants, still require humid conditions. This is the case of ferns and mosses. These groups of plants didn't (or haven't) develop complete independence from water, therefore they still need to be close to moist areas.
Therefore, <u>ferns and mosses indeed have a close relation to water plants. I would suggest an even closer one than those plants that have developed seeds and better adaptations to live their whole lives in land.</u>