Ferrocene is :
1. Fe(-C5H5)2
2. Fe(-C5H5)2
3. Cr(-C5H5)5
4. Os(-C5H5)2
Phospholipids are esters of glycerol with
1. one carboxylic acid residue and two phosphate groups
2. three phosphate groups
3. three carboxylic acid residues
4. two carboxylic acid residues and one phosphate groups
Compound that gives positive Fehling's solution test is :
1. Sucrose
2. Glucose
3. Fat
4. Protein
Which of the following is the sweetest sugar?
1. Sucrose
2. Glucose
3. Fructose
4. Maltose
Which one of the following sets of monosaccharides forms sucrose ?
1. a-D-galactopyranose and a-D-glucopyranose
2. a-D-glucopyranose and b-D-fructofuranose
3. b-D-glucopyranose and a-D-fructofuranose
4. b-D-glucopyranose and b-D-fructofuranose
a-D-(+)-glucose and b-D-(+)-glucose are
1. | Anomers | 2. | Epimers |
3. | Enantiomers | 4. | Geometrical isomers |
The couplings between base units of DNA is through :
1. | Hydrogen bonding | 2. | Electrostatic bonding |
3. | Covalent bonding | 4. | Van der waal's forces |
Which of the following does not exihibit the phenomena of mutarotation?
1. (+) Sucrose
2. (+) Lactose
3. (+) Maltose
4. (-) Fructose
RNA and DNA are chiral molecules, their chirality is due to
1. L-sugar component
2. chiral bases
3. chiral phosphate ester units
4. D-sugar-component
The correct option about the presence of H-bond in nucleotides is:
1. A-T, G-C
2. A-G, T-C
3. G-T, A-C
4. A-A, T-T
Glycolysis is
1. oxidation of glucose to pyruvate
2. conversion of glucose to haem
3. oxidation of glucose to glutamate
4. conversion of pyruvate to citrate
Which is not a true statement?
1. a-carbon of a-amino acid is asymmetric except glycine
2. All proteins are found in L-form
3. Human body can synthesis all proteins they need
4. At pH = 7 both amino and carboxylic groups exist in ionised form
An amine among the following that acts as hormone is :
1. Thyroxine
2. Oxypurin
3. Insulin
4. Progesterone
An example of biopolymer is
1. teflon
2. neoprene
3. nylon-66
4. DNA
Among the following non-reducing sugar is :
(1) Glucose
(2) Fructose
(3) Sucrose
(4) Galactose
When glucose is reacted with phenyl hydrazine then osazone is formed. In this reaction how many phenyl hydrazine molecules are used ?
1. 1
2. 2
3. 3
4. 4
Sucrose on treatment with conc. HCl produces:-
(1) Glucose
(2) Fructose
(3) Glucose + Fructose
(4) Maltose
Which type of amino acid is lysine ?
1. b - amino acid
2. Acidic
3. Basic
4. Neutral
The above process in which a and b form remain in equilibrium with acyclic form and a change in optical rotation is observed which is called as–
(1) Mutarotation
(2) Epimerisation
(3) Condensation
(4) Inversion
At iso-electric point:
(1) conc. of cation is equal to conc of anion
(2) Net charge is zero.
(3) Maximum conc. of di-polar ion (Zwitterion) will be present
(4) All of the above
Which amino acid does not contain a chiral center?
1. Valine
2. Leucine
3. Glycine
4. Iso-leucine
Which of the following pair gives same phenyl osazone ?
(1) D-Glucose and D-Allose
(2) D-Glucose and D-Alfrose
(3) D-Glucose and D-Mannose
(4) D-Glucose and D-Talose
Proteins mainly contain:
(1) C, H, O and N
(2) only C and H
(3) C, H and O
(4) N and H
The main structural feature(s) of protein is/are:
1. The ester linkage
2. The ether linkage
3. The peptide linkage
4. All of these
Keratin, a structural protein is present in:
1. hair
2. skin
3. wool
4. All of the above
Blood protein is ?
(1) albumin
(2) haemoglobin
(3) both (1) and (2)
(4) none of these
A vitamin which plays a vital role in the coagulating property of blood is:-
(1) vitamin A
(2) vitamin D
(3) vitamin B
(4) vitamin K
Which is not a poison for enzymes?
(1) CN-
(2) Fe3+
(3) Pb2+
(4)
The non-proteinous substances which certain enzymes required for their activity are called:
(1) catalysts
(2) inhibitors
(3) co-enzymes
(4) epimers
Antibodies are?
(1) Carbohydrates
(2) proteins
(3) phospholipids
(4) lipids
Which of the following statements about enzymes is incorrect?
(1) The catalytic action of an enzyme is not specific
(2) An enzymatic reaction is highly sensitive to temperature
(3) The catalytic action of enzymes is due to their capacity to lower the energy of activation of a particular reaction
(4) None of the above
An antigen develops antibodies which protect the body from their harmful effects. The antibodies
are:-
(1) immunoglobulins
(2) phospholipids
(3) albumins
(4) lymphocytes
Deficiency of which Vitamin develops impotence: |
(1) B
(2) C
(3) D
(4) E
Which of the following is protein hormones?
1. Insulin
2. Oxytocin
3. Both (1) and (2)
4. None of the above
The function of DNA is:
1. | To synthesize RNA. |
2. | To synthesize the necessary proteins. |
3. | To carry the hereditary characteristics from generation to generation. |
4. | All of the above. |
Which one of the following vitamins contains a metal atom?
1. Riboflavin
2. Vitamin B12
3. Vitamin A
4. Vitamin B6
Adenosine is an example of:
(1) nucleotide
(2) nucleoside
(3) purine base
(4) pyrimidine base
The incorrect statement among the following is:
1. | Insulin maintains the sugar level in the blood of a human body. |
2. | Ovalbumin is a simple food reserve in egg white. |
3. | Blood proteins thrombin and fibrinogen are involved in blood clotting. |
4. | Denaturation makes the proteins more active. |
In a protein molecule, various amino acids are linked together by
(1) b-glycosidic bond
(2) peptide bond
(3) dative bond
(4) a-glycosidic bond
Which of the following hormones is produced under the condition of stress which
stimulates glycogenolysis in the liver of human beings?
1. Thyroxin
2. Insulin
3. Adrenaline
4. Estradiol
Deficiency of vitamin B1 causes the disease
1. convulsions
2. beri-beri
3. cheilosis
4. sterility
Which one of the following sets of monosaccharides forms sucrose?
1. a-D-galactopyranose and a-D-glucopyranose
2. α-D-glucopyranose and b-D-fructofuranose
3. b-D -glucopyranose and a-D fructofuranose
4. α-D-glucopyranose and b-D-fructopyranose
Which one of the following does not exhibit the phenomenon of mutarotation ?
1. (+) Sucrose
2. (+) Lactose
3. (+)Maltose
4. (-)Fructose
During the process of digestion, the proteins present in food materials are hydrolysed to amino acids. The two enzymes involved in the process
are respectively:
(1) amylase and maltase
(2) diastase and lipase
(3) pepsin and trypsin
(4) invertase and zymase
The human body does not produce
(1) DNA
(2) vitamins
(3) hormones
(4) enzymes