Glycogen is a branched chain polymer of α-D-glucose units in which chain is formed by C1—C4 glycosidic linkage whereas branching occurs by the formation of C1-C6 glycosidic linkage. Structure of glycogen is similar to ______.
Glycogen is a branched chain polymer of αD glucose units in which chain is formed by C1−C4 glycosidic linkage whereas branchin occurs by the formation of C1−C6 glycosidic linkage. Structure of glycogen can be shown below similar to the sturcture amplopectin.
Which of the following polymer is stored in the liver of animals?
If blood glucose levels become too low, glucagon (pancreatic hormone) is released, which causes the liver to convert the stored glycogen back into glucose, and release it into the bloodstream.
Sucrose (cane sugar) is a disaccharide. One molecule of sucrose on hydrolysis gives _________.
Proteins are found to have two different types of secondary structures viz. α-helix and β-pleated sheet structure. α-helix structure of protein is stabilised by :
In α-helix, hydrogen bonds are present between –NH group of one amino acid residue to the >C= O group of another aminoacid residue.
Which of the following is NOT a culinary use of oil in the food industry?
Flavor, texture and shortening are all major culinary uses of oil in the food industry.
Dinucleotide is obtained by joining two nucleotides together by phosphodiester linkage. Between which carbon atoms of pentose sugars of nucleotides are these linkages present?
Nucleic acids are the polymers of ______________.
Nucleotides are organic molecules that serve as the monomer units for forming the nucleic acid polymers deoxyribonucleic acid and ribonucleic acid, both of which are essential biomolecules within all life-forms on Earth.
Which of the following statements is not true about glucose?
Each polypeptide in a protein has amino acids linked with each other in a specific sequence. This sequence of amino acids is said to be ____________.
The primary structure of a protein refers to the sequence of amino acids in the polypeptide chain. The primary structure is held together by peptide bonds that are made during the process ofprotein biosynthesis.
DNA and RNA contain four bases each. Which of the following bases is not present in RNA?
Thymine is one of the four nucleobases in the nucleic acid of DNA that are represented by the letters G–C–A–T. The others are adenine, guanine, and cytosine. Thymine is also known as 5-methyluracil, a pyrimidine nucleobase. In RNA, thymine is replaced by the nucleobase uracil.
Which of the following B group vitamins can be stored in our body?
Which one of the following bases is not present in DNA?
Quinoline is an alkaloid, it is not present in DNA. DNA has four nitrogen bases in adenine, guanine, cytosine and thymine
Three cyclic structures of monosaccharides are given below which of these are anomers.
Structures (I and II) differ only in the position of OH at C2 and hence are anomers.
Which of the following reactions of glucose can be explained only by its cyclic structure?
Due to absence of free OH group at C2 cyclic structure of glucose pentacetate cannot revert to open chain aldehydic form and hence cannot form an oxime.
Optical rotations of some compounds along with their structures are given below which of them have D configuration.
Structure of a disaccharide formed by glucose and fructose is given below. Identify anomeric carbon atoms in monosaccharide units.
Carbon adjacent to the oxygen atom in the cyclic structure of glucose or fructose is known as anomeric carbon. As shown in the structure above ‘a’ and ‘b’ are present adjacent to an oxygen atom. Both carbons differ in configurations of the hydroxyl group.
Three structures are given below in which two glucose units are linked. Which of these linkages between glucose units are between C1 and C4 and which linkages are between C1 and C6?
Carbohydrates are classified on the basis of their behaviour on hydrolysis and also as reducing or non-reducing sugar. Sucrose is a __________.
Proteins can be classified into two types on the basis of their molecular shape i.e., fibrous proteins and globular proteins. Examples of globular proteins are :
Which of the following carbohydrates are branched polymer of glucose?
Which of the following monosaccharides are present as five membered cyclic structure (furanose structure)?
In fibrous proteins, polypeptide chains are held together by ___________.
Which of the following are purine bases?
Which of the following terms are correct about enzyme?