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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 2901. |
The sequence in which amino acids are linked to one another in a protein molecule is called its:A. Primary structureB. Secondary StructureC. tertiray structureD. all of these |
| Answer» Correct Answer - A | |
| 2902. |
Which one is chain growth polymer `?`A. StarchB. Nucleic acidC. PolystyreneD. Protein |
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Answer» Correct Answer - C Formation of polystyrene from styrene in the presence of potassium amide is an important example of anionic polymerization which is one of the mechanism of chain growth polymerization. |
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| 2903. |
Which one given below is a non`-` reducing sugar ?A. SucroseB. MaltoseC. LactoseD. Glucose |
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Answer» Correct Answer - A Sucrose is nonreducing sugar. `(` If both the anomeric carbon are bonded to each other, then such sugars are called nonreducing `)`. |
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| 2904. |
The sequence in which amino acids are linked to one another in a protein molecule is called its:A. quaternary structureB. tertiary structureC. secondary structureD. primary sturcture |
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Answer» Correct Answer - D Proteins many have one or more polypeptide chains. Each polypeptide in a protein has `alpha`-amino acids linked with each other in a specific sequence and it is this sequence of amino acids that is said to be the primary structure i.e., the sequence of amino acids creates a different protein. For a polypeptide containing 20 different amino acids, each occuring once in the chain, the number of different amino acid sequences, i.e., primary sturctures is 20 ! (factorial twenty). A protein containing a total of 100 amino acid residues is a very small protein, yet 20 different amino acid can be combined at one time in `(20)^(100)` different ways. |
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| 2905. |
The sequence in which amino acids are linked to one another in a protein molecule is called its:A. Primary structureB. secondary structureC. tertiarry structureD. quaternary structure |
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Answer» Correct Answer - A The sequence of amino -acid in a protein is known as its primary structure. |
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| 2906. |
In a protein molecule various amino acids are linked together by `:`A. dative bondB. `alpha`- glycosidic bondC. `beta`- glycosidic bondD. peptide bond |
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Answer» Correct Answer - D In a protein molecule various amino acids are linked together by the `- CO - NH-` bond, called the peptide bond or the peptide linkage. |
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| 2907. |
The sequence in which amino acids are linked to one another in a protein molecule is called its:A. Primary structureB. Secondary structureC. Tertiary structureD. Quaternary structure |
| Answer» Correct Answer - A | |
| 2908. |
The monomeric unit, composed of a nitrogenous base, a sugar and a phosphate, that is present in nuleic acids is called aA. nucleotideB. nucleosideC. phosphotideD. phosphoside |
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Answer» Correct Answer - A Nucleic acids are long chain polymers of nucleotides and thus called polynucleotides. |
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| 2909. |
In a protein molecule various amino acids are linked together by `:`A. a peptide linkageB. an ether linkageC. an ester linkageD. a secondary amine linkage |
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Answer» Correct Answer - A Proteins are the polymers of `alpha`-amino acids which are connected to each of peptide bond or peptide linkage. Chemically, peptide linkage is an amide functional unit, `-CO-NH-` formal between `-COOH` group and `-NH_(2)` group. |
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| 2910. |
The general formula of carbohydrate isA. `C_(n)H_(2n+1)O`B. `C_(n)H_(2n)O`C. `C_(n)(H_(2)O)_(n)`D. `C_(n)(H_(2)O)_(2n)` |
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Answer» Correct Answer - C The general formula of carbohydrates is `C_(n)(H_(2)O)_(n)`, where n is an integer. |
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| 2911. |
Cellulose is a:A. monosaccharideB. disaccharideC. polysaccharideD. none of these |
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Answer» Correct Answer - C A polysaccharide containing glucose units. |
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| 2912. |
Common table sugar is more formally described as:A. glucoseB. fructoseC. lactoseD. sucorse |
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Answer» Correct Answer - D Sucrose , a disaccharide, is the common table sugar. Glucose is blood sugar, fructose is fruit sugar while lactose is milk sugar. |
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| 2913. |
Dhydroxy acetrone `(CH_(2)OH.CO.CH_(2)OH))` has the general formula of carbohydrate but not included in this class because:A. it does not contain polydroxy groupB. it does not contain aldehyde groupC. it is not optically activeD. all of the above |
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Answer» Correct Answer - C It does not contain asymmetric carbon. |
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| 2914. |
Lactose has the same molecular formula as:A. glucoseB. maltoseC. laevuloseD. galactose |
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Answer» Correct Answer - B Both have molecular formula `C_(12)H_(22)O_(11)`. |
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| 2915. |
Common table sugar is more formally described as:A. glucoseB. lactoseC. maltseD. sourose |
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Answer» Correct Answer - D It is obtained fron sugar cane and is a disaccharide |
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| 2916. |
Which does not contain carbohydrate?A. celluloseB. WaxC. StrachD. Wheat flour |
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Answer» Correct Answer - B Wax is ester. |
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| 2917. |
Dexto rotatory sucrose is named equal as eitherA. `alpha`-D-glucopyranosyl `beta`-D-fructofuranosideB. `alpha`-D-glucopyranoside `beta`-D-fructofuranosylC. `alpha`-D-fructopyronosideD. Both a and b |
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Answer» Correct Answer - D |
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| 2918. |
To become a carbohydrate, a compound must contain at least:A. 3 carbonsB. 6 carbonsC. 4 carbonsD. 2 carbons |
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Answer» Correct Answer - A |
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| 2919. |
Match column I with column II and select the correct option from the given codes. `{:(" Column I",," Column II"),(A."""Glut ",,(i)"Intercellular ground substance"),(B."" "Antibody",,(ii)"Enzyme"),(C."" "Collagen",,(iii)"Hormone"),(D."""Trypsin",,(iv)"Fights infectious agents"),(E."""Insulin",,(v) "Enables glucose transport in cells"):}`A. `A-(i), B-(ii), C-(iii), D-(iv), E-(v)`B. `A-(v), B-(iv), C-(i), D-(ii), E-(iii)`C. `A-(v), B-(iv), C-(iii), D-(ii), E-(i)`D. `A-(ii), B-(i), C-(iv), D-(v), E-(iii)` |
| Answer» Correct Answer - B | |
| 2920. |
Glucose or sucrose are soluble in water but cyclohexane or bezene (simple six membered ring compounds) are insoluble in water. Explain. |
| Answer» Correct Answer - Due to intermolecular H-bonding, glucose and sucrose are soluble in waterm Benzene (molecular mass `=78 g mol^(-1)`) and cyclohexane (molecular mass `=84 g mol^(-1)`) are insoluble in water. The reason being that these compounds do not contain `-DH` groups and hence do not form H-bonds with water. Alternatively, benzene and cyclohexane which are non-polar molecules do not dissolve in polar water molecules while glucose and surose being polar molecules dissolve in polar water molecules. | |
| 2921. |
Transition state structure of the substrate formed during an enzymatic reaction isA. Permanent and stableB. Transient but stableC. Permanent but unstableD. Transient but unstable |
| Answer» Correct Answer - D | |
| 2922. |
Transition state structure of the substrate formed during an enzymatic reaction isA. permanent but unstableB. transient and unstableC. permanent and stableD. transient but stable |
| Answer» Correct Answer - B | |
| 2923. |
A phosphoglyceride is always made up ofA. A saturated or unsaturated fatty acid esterified to a glycerol molecules to which a phosphate group is also attachedB. A saturated or unsaturated fatty acid esterified ot a phosphate group to which is also attached to a glycerol moleculeC. Only a saturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attachedD. Only an unsaturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached |
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Answer» Correct Answer - A (A) A phosphoglyceride is always made up of a saturated or unsaturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached. |
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| 2924. |
Transition state structure of the substrate formed during an enzymatic reaction isA. Transient and unstableB. Permanent and stableC. Transient but stableD. Permanent but unstable |
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Answer» Correct Answer - A (A) Transition state structure of the substrate formed during an enzymaic reaction is transient and unstable. |
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| 2925. |
Quaternary structure is present inA. HistoneB. HaemoglobinC. GlobulinD. Elastin |
| Answer» Correct Answer - B | |
| 2926. |
Coenzyme isA. Often a vitaminB. Always an inorganic compoundC. Always a proteinD. Often a metal |
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Answer» Correct Answer - A (A) Coenzyme is often a Vitamin. |
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| 2927. |
The quaternary structure can be formed by only aA. Protein made up of a single polypeptideB. Protein made up of a minimum of two polypeptideC. Protein made up of a minimum of four polypeptidesD. Glycoprotein |
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Answer» Correct Answer - B (B) The quanternary structure can be formed by only a protein made up of a minimum of two polypeptides. |
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| 2928. |
The amino acid, phenylalanine is poorly soluble in water because its side chain or R group isA. HydrophilicB. Heterocyclic chainC. Aromatic and non-polarD. Aromatic and polar |
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Answer» Correct Answer - C (C) The amino acid, phenyl alanine is poorly soluble in water, because its side chain or R group is aromatic and non-polar. |
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| 2929. |
The hormone which controls the process of burning of fats, protiens, and carbohydrates and liberates energy in the body is:A. CortisoneB. AdrenalineC. ThyroxinD. Insulin |
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Answer» Correct Answer - D Insulin a hormone secreted by the pancreas, regulates glucose metabolism. Insulin deficiency in humans is the major problem in dibetes mellitus. |
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| 2930. |
Which of the following is correct state H-bonding in nucleotide ?A. A-T,G-CB. A-G,T-CC. G-T,A-CD. A-A,T-T |
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Answer» Correct Answer - A The structure of DNA molecules is a double helical structure . In this structure double helix are made up of two right handed helical polynucleotide chains which are held together by H-bonds. In these helixes the adenine (A) base is linked with thymine (T) by two H-bonds and guanine (G) is linked with cytocine (C) by three H-bonds are A=T, and G=C |
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| 2931. |
The hormone which controls the process of burning of fats, protiens, and carbohydrates and liberates energy in the body is:A. cortisoneB. thyroxineC. adrenalineD. insulin |
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Answer» Correct Answer - B Thyroxine is a hormone secreted by thyroid gland. This hormone controls various biochemicals reactions involving burning of proteins, carbohydrates, fats to release energy. It is an iodinated derivatives of amino acid tyrosine. |
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| 2932. |
Which of the following has magnesium?A. Vitamin`-B_(12)`B. chlorophyllC. HaemocyaninD. Carbonic anhydrates |
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Answer» Correct Answer - B Formula of chlorophyll is `C_(55)H_(72)MgN_(2)O_(6)`.so Mg is present in chlorophyll. It is the green colouring matter of leaves and green stems. Vitmin -`B_(12)` contains cobalt, haemocyanin contains copper and carbonic anydrates contains zinc. |
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| 2933. |
Which of the following is the sweetest sugar?A. sucroseB. glucoseC. fructoseD. maltose |
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Answer» Correct Answer - C Fructose is the sweetest sugar and highely soluble in water and slightly soluble in alcohol. It is insoluble in either fructose in laevorotatory hence, called laevulose. |
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| 2934. |
In DNA, the complementory bases areA. adenine and thymine, guanine and cytosineB. uracil and adenine, cytosine and guanineC. adenine and guanine, thymine and cytosineD. adenine and thymine, guanine and uracil |
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Answer» Correct Answer - A DNA has a double helical structure. These helix contains polynucleotides chain and these chains are held together by hydrogen bonds . In these polynucleotide chain of DNA , adenine has thymine opposite to it and guanine has cytosine opposite to it. |
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| 2935. |
Which statements are correct about lactose?A. `(C_(1)-beta)(OH)` of glucose is linked with `(C_(4)-OH)` of galactose.B. `(C_(1)-beta)-(OH)` of galactose is linked with `(C_(4)-OH)` of `beta`-glucose.C. It is hydrolysed both by amylase and lactase.D. It exhibits mutarotation. |
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Answer» Correct Answer - B::D Amylase hydrolyses `alpha-` linkage. (d) It exhibits mutarotation, since in `beta-D-`glucose `C-1 (OH)` group is hemiacetalic. |
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| 2936. |
Which statements are correct about lactose?A. IUPAC name of lactose is `beta-` galactopyranosyl-`beta`-D-glucopyranoside.B. IUPAC name of lactose is `beta-D`-glucopyranosyl `beta-D`- galactopyranosideC. On methylation with `MeOH//HCl`, it gives methyl-`beta`- D-glactopyranosyl- `beta`-D-glucopyranoside.D. On methylation with `MeOH//HCl`, it gives methyl- `beta`-D-glucopyranosyl-`beta`-D-galactopyranoside. |
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Answer» Correct Answer - A::B::C Since `C-1 OH` group in `beta-D-`glucose is hemiacetalic, so with `MeOH//HCl`, this `OH` group is methylated to form acetal. Thus with `beta-D-`glucose, the word glucopyranoside is named. |
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| 2937. |
Raphides are foundA. DahliaB. AsparagusC. NutD. Guav |
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Answer» Correct Answer - B (b) Raphides are needle shaped structures of calcium oxalate.These are found in epidermal cells of Asparagus, Eichhornia, Lemna etc. Cell with raphides are called idioblasts. |
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| 2938. |
A mixture of three protiens, `(A)` (pepsin), `(B)` (haemo-globin), and `(C )` (lysozyme) was seperated by elctrophoresis method at `pH=7`. The `pH` at isoelectric point `(pI)` of the proteins are `pI` of `(A)`, `(B)`, and `(C )` which are `1.1,6.7`, and `11.0`, respectively. which of the statement are correct?A. Pepsin (A) will migrate to the cathode.B. Lysozyme (C ) will migrate to the anode.C. Haemoglobon will not migrate.D. At pH=7, (A) and (C ) would precipitate out while (B) would remain in the solution. |
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Answer» Correct Answer - A::B::C Is in a very acidic range, has more anionic groups at `pH=7`, and will migrate to the positive electrode (cathode). `(B)(pI=6.7)` is present mostly with net zero charge and moves very littel or will not migrate. `(C )(pH=11.0)`, the very basic protein, exists mainly in the cationic form and migrates to the negative electrode (anode). At `pI`, amino acids have least solubities, so `(B)` `(pH=6.7)`, `[pH` very close to `pH` of the mixture `(pH=7)]`, is least soluble and would precipitate out, while `(A)` and `(C )` would remain in the solution. |
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| 2939. |
Pepsin is inactivated at pHA. Below 3B. Below 2C. Above 5D. Above 3 |
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Answer» Correct Answer - C (c) All enzymes are temperature and pH specific in nature pepsin of gastric juice works well at pH2. |
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| 2940. |
Enzymes have a very narrow optima forA. LightB. TemperatureC. pHD. Humidity |
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Answer» Correct Answer - C (c) All enzyme operates within a narrow range of pH. It is most effective at a particular point of this range which is called optimum pH. |
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| 2941. |
As temperature changes from `3^(@)C` to `45^(@)C`, the rate of enzyme activity willA. Decrease and then increaseB. Increase and then decreaseC. Increase onlyD. Decrease only |
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Answer» Correct Answer - B (b) If temperature increase from `3^(@)C` to `45^(@)C`, firstly it reaches to optimum condition and later temperature conditions are not optimum for enzyme activity. Thus the rate of enzyme activity initially increases and then decreases. |
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| 2942. |
Molecular weight of enzyme isA. Less than 5000B. 5000 to 10000C. 10000 to 20000D. More than 40000 |
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Answer» Correct Answer - D (d) Peroxidase one of the smaller enzymes has molecular weight of 4,000, where as catalase one of the largest has a molecular weight of 250,000. |
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| 2943. |
The four elements called "big-four" which make up 95% of all elements found in a living system areA. C,H,O,NB. C,H,O,PC. C,H,O,SD. C,N,O,P. |
| Answer» Correct Answer - A | |
| 2944. |
(a) Name the plant pigments present in the following : (i) carrots (ii) tomatoes. (b) Name the category of micromolecules of the cells whose examples include natural rubber, vitamin K etc. ( c) List any two conjugated lipids. |
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Answer» (a) (i) carotene (ii) lycopene. (b) Lipids ( c) Phospholipids, glycolipids. |
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| 2945. |
Which is correct statement?A. Starch is a polymer of `alpha`-glucoseB. Amylose is a component of celluloseC. Proteins are composed of only one type of amino acidsD. In cyclic structure of pyranose, there are five carbons and one oxygen atom |
| Answer» Correct Answer - A | |
| 2946. |
Which is an essential constituent of a diet?A. SoapB. GlucoseC. CarbohydratesD. Protein |
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Answer» Correct Answer - A |
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| 2947. |
Which one is not the essential constituent of balance dietA. carbohydratesB. vitaminsC. fatsD. hormones |
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Answer» Correct Answer - D |
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| 2948. |
Enzymes areA. ProteinsB. mineralsC. OilsD. fatty acids |
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Answer» Correct Answer - A Enzymes are proteins |
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| 2949. |
Which is an essential constituent of a diet?A. StarchB. GlucoseC. carbohydratesD. protein |
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Answer» Correct Answer - D Proteins forms an essential constituent of the diet. |
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| 2950. |
What is a nucleic acid ? In spite of having bases why they are called 'acids' ? |
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Answer» Nucleic acids are condensation polymers of nucleotides. To understand their functions you will find it helpful to look at how their molecules are built up and the structures of these molecules. |
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