Practice free Biomolecules (Zoology) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
Deficiency of vitamin B1 causes the disease
Deficiency of vitamin B1 causes beri-beri in which there occurs loss of appetite and vigour, weak heart beat etc.
Which one of the following sets of monosaccharides forms sucrose?
Sucrose is a disaccharide formed by the condensation of α-D-glucopyranose (a glucose monomer) and β-D-fructofuranose (a fructose monomer). The α and β refer to the orientation of the glycosidic bond between the two monosaccharides.
Which one of the following does not exhibit the phenomenon of mutarotation ?
Reducing sugars that exist in hemiacetal and hemiketal forms, undergo mutarotation in aqueous solution.
Among the given carbohydrates, only sucrose is a non-reducing sugar as in it the hemiacetal and hemiketal groups of glucose and fructose are linked together through O-atom and thus, not free. Due to the absence of free hemiacetal or hemiketal group, sucrose does not exhibit mutarotation.
Which of the following hormones contains iodine ?
Thyroxine, also known as T4, is a hormone produced by the thyroid gland. It contains four iodine atoms in its molecular structure, which is essential for its proper functioning in regulating metabolism and other physiological processes.
In DNA, the complimentary bases are:-
In DNA, the complementary base pairing is Adenine (A) pairs with Thymine (T), and Guanine (G) pairs with Cytosine (C). This specific pairing is known as Watson-Crick base pairing, which forms the double-helical structure of DNA.
Which one of the following vitamins is water-soluble?
(a) Vitamins are classified as
(i) Fat soluble vitamin : A, D, E, K
(ii) water soluble : Vitamin B complex and C
So vitamin B is water soluble.
RNA and DNA are chiral molecules, their chirality is due to :-
RNA and DNA are chiral molecules due to the presence of D-sugar component (deoxyribose in DNA and ribose in RNA). The D-sugar component introduces chirality in the backbone of the nucleic acid molecules.
Which of the following natural products is not a polymer ?
(c) ATP is a monomer molecule
Which of the following protein destroy the antigen when it enters in body cell?
(a) Antibodies are the proteins which protect the body against toxic substances and infections. When an antigen enter in the body cells, the antibodies present in the body destroyed the antigen.
Enzymes take part in a reaction and
(b) The enzymes are biological catalyst produced by living cells which increase the rate of biochemical reactions in living organisms.
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