What are the identifying characteristics of structural polysaccharides?
The identifying characteristics of structural polysaccharides are as follows:
i) They have comparatively higher molecular weight than other carbohydrates
ii) They are non reducing sugar.
iii) They are insoluble in water and don't taste sweet.
What do you mean by active site of an enzyme?
The binding site and the catalytic site of an enzyme are collectively called as active site of an enzyme.
Enzymes as a whole are not involved in catalytic activity, only a small part of it gets actively involved in substrate before going catalysis (binding site) and another small part involved in catalytic process (catalytic site)
Differentiate between micro molecules and macro molecules.
|They are smaller molecules having lower molecular weight.||They are larger molecules with higher molecular weight.|
|They are formed by different elements like C,H,O,N etc. ||They are formed by polymerization of large number of micromolecules|
|For eg: monosaccharide, amino acids, fatty acids, nucleotides etc.||For eg: polysaccharides, proteins, lipids, nucleic acids etc.|
What are the importance of DNA?
- It is the principal genetic material that carries genetic information from generation to generation.
- It controls all the biological activities of a cell. For example. protein synthesis.
- It can replicate and form its own carbon copies.
- It can synthesize RNA by the process of transcription.
- The mutation is caused by changes in the sequence of nitrogen bases in DNA.
yo formation of lipid ma lipid kaha form vayo?? RCOOH ta xaina. How is lipid formed??
Well it's your misconception that every ester is lipid. Only the esters of fatty acids are lipids and in the above reaction ester is formed by the removal of a molecule of water. This is simply a general formula . In the same case if the akyl group(-R) is replaced by fatty acid (which is itself a hydrocarbon chain) then that's lipid. Hope you understood.
Define Storage polysaccharides with example.
Storage polysaccharides are a polysaccharide that occurs in a living organism as a form of stored energy.
Storage polysaccharides include the glycogen in animals and the starch and fructosan in plants.
Examples of polysaccharides : Starch, cellulose and glycogen.
Polysaccharides are also formed as products of bacterial, for example, in yogurt production.
Describe function of polysaccharides in living organism.
Polysaccharides, or polycarbohydrates , are the most abundant carbohydrate found in food which provides very important dietary elements for human nutrition. It can be starch , cellulose or glycogen. They are important class of biological polymers. It's function in living organism is generallly either energy storage or structual support.
Describe structure of DNA according to Watson and Crick Model.
Watson and Crick described DNA as a double helix that contained two long, helical strands wound together. In their model, each DNA strand contained individual units called bases, and the bases along one DNA strand matched the bases along the other DNA strand. Some characteristics of this DNA are,
a.) DNA consists of about 10^10 deoxyribonucleotides.
b.) The diameter of DNA is about 20 Angstrom.
c.) Nitrogen bases are of two types: purines (Adenine and Guanine) and pyrimidines (Cytosine and...
Explain function of amino acids.
Amino acids are molecules that combine to form protein. Some of the important function of amino acids are;
a.) Amino acid are building block of proteins .
b.) Amino acids are amphoteric(able to react both as an acid and a base), thus they can buffer in solutions, resisting change in pH .
c.) Histidine are found in active site of enzymes where it causes making and breaking of bonds.
d.) Cysteine links chain together by forming disulfide bonds.
e.) The non- protein amino acids are useful compounds...
How does water help in maintaining the constancy of the internal environment of an organism?
Maintaining the constancy of internal environment of an organism ishomeostasis. Water plays an important role in maintaining homeostasis which are mentioned below;
- Water dissolves gases thus, helps in exchange and transportation of oxygen and carbondioxide.
- Water , when excreted removes water soluble toxins from the body.
- Water helps to remove excess heat from body in form of sweat that helps to regulate body temperature.
Describe the Structure and function of ATP.
ATP (Adenosine Tri Phosphate ) is a nucleotide that consists of three main structure which includes the nitrogenous base, adenine; the sugar , ribose ; and a chain of three phosphate groups bound to ribose.
It is the major molecule for storing and transferring energy in cells . It is often referred to as the energy currency of the cell .
For more information, watch this informative video.
How are amino acids bonded together? Describe how these bonds are formed?
When the carboxyl group of one amino acid comes to lie adjacent to the amino group of another amino acid then with the loss of one H20 molecule (i.e through dehydration) a covalent bond is formed in between them which is called a peptide bond.
Describe the structure of protein and it's functions.
Proteins are complex molecules that play essential roles in living organisms. They are made up of long chains of amino acids, which are organic compounds. The structure of a protein consists of four levels: primary, secondary, tertiary, and quaternary.
1. Primary structure: This refers to the specific sequence of amino acids in a protein chain. The order of amino acids is determined by the genetic code encoded in the DNA of an organism.
2. Secondary structure: Protein chains often fold into...
Describe the functions of lipid .
Following are the functions of lipid:
1. Energy Storage: Lipids serve as a concentrated source of energy in the body. When broken down, they release more than twice the energy compared to carbohydrates or proteins. Adipose tissue, which is primarily composed of lipids, acts as a long-term energy reserve in the form of triglycerides.
2. Structural Component: Lipids play a crucial role in building and maintaining the structure of cell membranes. Phospholipids, a type of lipid, form a lipid...
Macromolecules in the cells include
Which of the following is not a carbohydrate?
Which of the following doesnot contain metal?
Deficiency of protein leads to:
Glycolipids and phospolipids are
Enzyme is a
(note: enzymes are complex globular protein and enzymes are active in secondary and tertiary structure)
Lipid consists of
Which of the following is a polysaccharide?
DNA has which sugar in it
Magnesium is present in
Yeast is an important source of
Keratin is a protein having larger amount of
Which stage is marked by terminalization of chiasmata?
DNA is composed of repeating units of
Cholestrol amount is minimum in
Immediate source of energy is
The smallest structural unit of protein is
Omega 3 fatty acid will be found
A heteropolysaccharide is
Carrier of genetic information is