3593 + Interview Questions in BIOMOLECULES IN GENERAL AWARENESS Page 5 InterviewSolution

201.	Phosphodiester linkage present betweenA. 1 and 2 carbon atoms of two pentose sugarB. 3 and 5 carbon atoms of two pentose sugarC. 2 and 3 carbon atoms of two pentose sugarD. 1 and 3 carbon atoms of two pentose sugar
Answer» Correct Answer - B

Discussion

202.	Pentose sugar present in RNA isA. `beta`-D-riboseB. `alpha`-D-riboseC. `beta`-D-2-deoxyriboseD. `alpha`-D-deoxyribose
Answer» Correct Answer - A

Discussion

203.	Which of the following is used for making mucilage for postal stamps?A. DextrinB. PectinC. ReffinoseD. Melibiose
Answer» Correct Answer - A The dextrins, `(C_(6) H_(10) O_(5))_(n)`, are polysaccharides which are produced by the partial hydrolysis of starch by boiling with water under pressure at about `250^(@)C`. They are white powders, and are used for making adhesives and confectonery. For sizing paper etc, Pectins are polysaccharides found in plant and fruit juices. Their characterstic property is the ability of their solutions to gelate, i.e., form jellies. Thus, these carbohydrates are used in preparing fruit jams and jellies. `(+) -` Raffinose is a trisaccharide, having the formula `C_(18) H_(32) O_(16)` . It is non reducing sugar found in beet molasses. Hydrolysis by acid gives `D-` fructose, `D-` galactose and `D-` glucose , hydrolysis by the enzyme `alpha`-galactosidase gives `D-` galactose and sucrose and hydrolysis by invertase (a sucrose-splitting enzyme) gives `D-` fructose and the disaccharide melibose, in which the two monosaccharide molecules are linked by the `6^(th)` carbon atom (the aldehyde carbon atom being number one ) of the reducing monosaccharide.

Discussion

204.	Why are hormones known as ‘glandular juice’?
Answer» Hormones are also known as ‘Glandular Juices’ because they are secreted by endocrine glands.

Discussion

205.	The conversion of protein to amino acids takes place by which of the following enzyme?(a) Lipase(b) Maltase(c) Trypsin(d) Renin
Answer» The answer is (c) Trypsin

Discussion

206.	Number of the thyroid gland in humans is(a) One(b) Two(c) Three(d) Four
Answer» The answer is (a) One

Discussion

207.	Why are hormones known as “Chemical messengers”?
Answer» Hormones are known as chemical messengers because they are secreted by glands and they work in the cells and the tissues away from their origin.

Discussion

208.	Chemical messengers are(a) Hormones(b) Enzymes(c) Vitamins(d) Nucleic acids
Answer» (a) Hormones

Discussion

209.	EnzymesA. have optimum activity at body temperatureB. consists of nuclei acidsC. carbohydrateD. have all these properties
Answer» Correct Answer - A Enzymes have maximum efficiency at body temperature

Discussion

210.	The sequence in nucleic acids is(a) Base – sugar – phosphate(b) Sugar – base – phosphate(c) Phosphate – base – sugar(d) Base – phosphate-sugar
Answer» (a) Base – sugar – phosphate

Discussion

211.	The nucleic acids are broken into nucleotides by………A. AmylasesB. NucleasesC. LipasesD. Proteases
Answer» Correct Answer - B

Discussion

212.	In nucleic acids, the sequence isA. Phosphate-Base-SugarB. Sugar-Base-PhosphateC. base-phosphate-sugarD. None
Answer» Correct Answer - C In nucleic acids, the sequence is base-sugar phophate.

Discussion

213.	Enzymes in the living systemsA. provide energyB. provide immunityC. transport oxygenD. catalyse biochemical processes
Answer» Correct Answer - D Enzymes in living system catalyse biological processess.

Discussion

214.	Enzymes belog to the class of compoundsA. polysaccharideB. polypeptidesC. polynitrogen heterocyclic compoundD. hydrocarbons
Answer» Correct Answer - B Enzymes are polypeptides.

Discussion

215.	Protein is a polymer ofA. glucoseB. tetephathalic acidC. amino acidsD. glycol
Answer» Correct Answer - C Proteins is a polymer of `alpha`-amino acids

Discussion

216.	Which amino acid has no assymmetric carbon atom?A. histidineB. glycineC. `alpha`-alanineD. threonim
Answer» Correct Answer - B Glycine has no assymmetric carbon atom `H_(2)N-CH_(2)-CO OH`

Discussion

217.	Which of the following is not present in nucleotide?A. GuanineB. CytosineC. adenineD. Thyroxine
Answer» Correct Answer - D Tryoxine is not present in nucleotide.

Discussion

218.	Which of the following is found in cod-liver oil ?A. AB. `B_(12)`C. `B_(1)`D. C.
Answer» Correct Answer - A Cod liver oil is rich in vitamin A and D

Discussion

219.	Which of the following is a molecular disease?A. allergyB. cancerC. german measlesD. sickel cell anemia.
Answer» Correct Answer - D Sickel cell anemia is a molecular disease.

Discussion

220.	Vitamin A is present inA. liverB. milkC. green vegetablesD. all.
Answer» Correct Answer - D vitamin a is present in liver, milk and green vegetables.

Discussion

221.	Which of the following is capable of forming a zwitter ion ?A. `NH_(2)CH_(2)CO OH`B. `CH_(3)CO OH`C. `CH_(3)CH_(2)NH_(2)`D. `C Cl_(3)NO_(2)`.
Answer» Correct Answer - A Amino acids (e.g., `NH_(2)CH_(2)CO OH`) forms zwitter ions at isoelectric point.

Discussion

222.	Glycoproteins containA. Protein and fatB. Protein and saltC. Protein and vitaminD. Protein and carbohydrates
Answer» Correct Answer - D (d) When protein adjoins with carbohydrates, is known as gylcoprotein, which is a conjugated protein.

Discussion

223.	The prosthetic group in glycoproteins isA. carbohydrateB. fatC. vitaminD. nucleic acid
Answer» Correct Answer - A The prosthetic group in glycoprotein is carbohydrate.

Discussion

224.	Insulin is secreted byA. stomachB. pancreasC. lungsD. none
Answer» Correct Answer - B Insulin is secreted by pancrease.

Discussion

225.	The chemical substance which acts as emulsifier is:A. phosphoric acidB. fatty acidC. bile acidsD. mineral acids (HCl).
Answer» Correct Answer - C Bile acids acts as a eumulsifers oils and fats present in our food.

Discussion

226.	Choose the correct non-protein amino acidA. hydroxyprolineB. hydroxylysineC. cysteineD. `gamma` amino butyric acid
Answer» Correct Answer - D

Discussion

227.	The two polypeptides of human insulin are linked together byA. Hydrogen bondsB. Phosphodiester bondC. Covanlent bondD. Disulphide bridges
Answer» Correct Answer - D

Discussion

228.	Salicin (structure given below) is a glycoside, found in the bark of willow tree, used in relieving pain. Observe the following reaction of salicin. The correct statement (s) is (are): .A. `P` is `D`-glucoseB. `Q` is 2-hydroybenzylalcoholC. `Q` can be converted to a modern analgensic (pain killer), aspirinD. The above reaction occurs through a carbocation
Answer» Correct Answer - A::B::C::D

Discussion

229.	Antibodies that help to fight infectious agents areA. PolysaccharidesB. Amino acidsC. ProteinsD. Glucose
Answer» Correct Answer - C

Discussion

230.	Primary structure of protein is due toA. sequence in which `alpha`-amino acids are linked to one anotherB. sequence in which amino acid of one polypeptide chain are joined to other chainC. the folding patterns of polypeptide chainsD. the pattern in which the polypeptide chains are arranged.
Answer» Correct Answer - A The sequence in which the `alpha`-amino acids are linked to one another in a protein molecule is called its primary structure.

Discussion

231.	Mark the incorrect example.A. Keratin and myosin-Fibrous proteinsB. Insulin and albumins -Globular proteinsC. Glycylalanine-DipeptideD. Enzymes and haemoglobin -Derived proteins
Answer» Correct Answer - D Enzymes and haemoglobin are the examples of globular proteins.

Discussion

232.	Enumerate the reactions of `D`-Glucose which cannot be explained by its open-chain structure.
Answer» (a) `D(+) -` glucose does not undergo certain characteristic reactions of aldehydes, e.g., glucose does not form `NaHSO_(3)` addition product. (b) Glucose reacts with `NH_(2)OH` to form an oxime but glucose pentaccetate does not. This implies that the aldehydic group is absent in glucose pentaccetate. (c) `D - (+) -` glucose exists in two stereoisomeric forms, i.e., `alpha`-glucose and `beta-`glucose. (d) Both `alpha - D -` glucose and `beta - D -` glucose undergo mutarotation in aqueous solution. Although the crystalline forms of `alpha -` and `beta - D (+) -` glucose are quite stable in aqueous solution but each form slowly changes into an equilibrium. mixture of both. (e) `D(+)-` glucose forms two isomeric methyl glucosides. Aldehydes normally react with two moles of methanol per mole of the aldehyde to form an acetal but `D(+) -`glucose when treated with methanol in presence of dry HCl gas, reacts with only one mole of methanol per mole of glucose to form a mixture of two methyl `D-`glucosides i.e., methyl `- alpha - D -`glucoside (melting point 43.8 K, specific rotation `+158^(@)`) and methyl `-beta - D -` glucoside (melthing point 308 K, specific rotation `-33^(@)`)

Discussion

233.	Enumerate the reactions of D-glucose which cannot be explained by its open-chain structure.
Answer» The following reactions of D- glucose cannot be explained by its open chain structure. 1. D - glucose does not undergo certain characteristic reactions of aldehydes. For example glucose does not form NaHSO₃ addition product, aldehyde-ammonia adduct, 2, 4, DNP derivative and does not respond to Schiff’s reagent test. 2. Glucose reacts with NH₂OH to form an oxime but glucose pentaacetate does not. This implies that the aldehyde group is absent in glucose pentaacetate. 3. D (+) - Glucose exists in two stereoisomeric forms ie. α – glucose and β- glucose, α - D (+) - glucose is obtained when a concentrated aqueous or alcoholic solution is crystallised at 303K. It has a melting point of 419K and has a specific rotation of +111° in a freshly prepared aqueous solution. However when glucose is crystallised from water above 371 K β - D (+) glucose is obtained. 4. Both α - D glucose and β - D glucose undergo mutarotation in aqueous solution.

233.

Enumerate the reactions of D-glucose which cannot be explained by its open-chain structure.

Answer»

The following reactions of D- glucose cannot be explained by its open chain structure.

1. D - glucose does not undergo certain characteristic reactions of aldehydes. For example glucose does not form NaHSO₃ addition product, aldehyde-ammonia adduct, 2, 4, DNP derivative and does not respond to Schiff’s reagent test.

2. Glucose reacts with NH₂OH to form an oxime but glucose pentaacetate does not. This implies that the aldehyde group is absent in glucose pentaacetate.

3. D (+) - Glucose exists in two stereoisomeric forms ie. α – glucose and β- glucose, α - D (+) - glucose is obtained when a concentrated aqueous or alcoholic solution is crystallised at 303K. It has a melting point of 419K and has a specific rotation of +111° in a freshly prepared aqueous solution. However when glucose is crystallised from water above 371 K β - D (+) glucose is obtained.

4. Both α - D glucose and β - D glucose undergo mutarotation in aqueous solution.

Discussion

234.	With reference to DNA, mention the types of(a) Pyrimidine bases(b) Purine bases
Answer» (a) Pyrimidine bases – Cytosine & Thymine (b) Purine bases – Adenine & Guanine

234.

With reference to DNA, mention the types of(a) Pyrimidine bases(b) Purine bases

Answer»

(a) Pyrimidine bases – Cytosine & Thymine

(b) Purine bases – Adenine & Guanine

Discussion

235.	Which of the following are purine bases?A. GuanineB. AdenineC. ThymineD. Uracil
Answer» Correct Answer - A::B

Discussion

236.	Which of the following monosaccharides are present as five membered cyclic structure (furanose structure)?(i) Ribose(ii) Glucose(iii) Fructose(iv) Galactose
Answer» (i), (iii) (i) Ribose (iii) Fructose

236.

Which of the following monosaccharides are present as five membered cyclic structure (furanose structure)?(i) Ribose(ii) Glucose(iii) Fructose(iv) Galactose

Answer»

(i), (iii)

(i) Ribose

(iii) Fructose

Discussion

237.	Which of the following are purine bases?(i) Guanine(ii) Adenine(iii) Thymine(iv) Uracil
Answer» (i), (ii) (i) Guanine (ii) Adenine

237.

Which of the following are purine bases?(i) Guanine(ii) Adenine(iii) Thymine(iv) Uracil

Answer»

(i), (ii)

(i) Guanine
(ii) Adenine

Discussion

238.	In fibrous proteins, polypeptide chains are held together by........ .A. van der Waals forcesB. electrostatic forces of attractionC. hydrogen bondsD. covalent bonds.
Answer» Correct Answer - C Polypeptide chains in fibrous proteins are held together by disulphide and hydrogen bonds.

Discussion

239.	In fibrous proteins, polypeptide chains are held together by ___________.(i) van der Waals forces(ii) disulphide linkage(iii) electrostatic forces of attraction(iv) hydrogen bonds
Answer» (ii), (iv) (ii) disulphide linkage (iv) hydrogen bonds

239.

In fibrous proteins, polypeptide chains are held together by ___________.(i) van der Waals forces(ii) disulphide linkage(iii) electrostatic forces of attraction(iv) hydrogen bonds

Answer»

(ii), (iv)

(ii) disulphide linkage

(iv) hydrogen bonds

Discussion

240.	In fibrous proteins, polypeptide chains are held together by........ .A. van der Waals forcesB. disulphide linkageC. electrostatic forces of attractionD. hydrogen bonds
Answer» Correct Answer - B::D In fibrous proteins, polypeptide chains are held together by hydrogen and disulphide bond, in parallel manner. Due to which fibre-like structure is obtained. Such proteins are generally known as fibrous proteins. These proteins are generally insoluble in water e.g., keratin, myosin.

Discussion

241.

Give the sources of the following vitamins- A,B1,B2,B6,B12,C

Answer»

S .No.	VITAMINS	SOURCES
1	A	Milk,butter,carrot,fish liver oil
2	B₁	Milk,green vegetables,cereals,yeast
3	B₂	Milk,egg white,liver,kidney
4	B₆	Milk,egg yolk,cereals,gram,yeast
5	B₁₂	Curd,meat,milk,fish,egg
6	C	Cirtus fruits

Discussion

242.

Name the deficiency diseases due to following vitamins - A,B1,B2,B6,B12,C

Answer»

S No	VITAMINS	DISEASES
1	A	Night blindness, Xeropthlamia
1	B₁	Retarded growth, Beri-Beri
2	B₂	Cracking of corners of lips, Digestive disorder, burning sensation of skin
3	B₆	Convulsions
4	B₁₂	Pernicious anemia
6	C	Scurvy, Bleeding of gums

Discussion

243.	Assertion. Cellulose of our diet simply provides bulk (fibre, roughage) and no nutrient. Reason. Cellulose is not hydrolysed (digested) in our gut. It hastens movement of faeces through the intestine.A. If both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.B. If both Assertion and Reason are true but Reason is not a correct explanation of the Assertion.C. If Assertion is true but the Reason is false.D. If both Assertion and Reason are false.
Answer» Correct Answer - A

Discussion

244.	Shanti, a domestic helper of Mrs. Anuradha, fainted while mopping the floor. Mrs. Anuradha immediately took her to the nearby hospital where she was diagnosed to be severely 'anaemic‘. The doctor prescribed an iron rich diet and multivitamins supplement to her. Mrs. Anuradha supported her financially to get the medicines. After a month, Shanti was diagnosed to be normal. After reading the above passage, answer the following questions: (i) What values are displayed by Mrs. Anuradha? (ii) Name the vitamin whose deficiency causes 'pernicious anaemia‘. (iii) Give an example of a water soluble vitamin.
Answer» (i) Helpfulness, caring, generosity, kindness attitude towards poor. (ii) Vitamin B₁₂. (iii) Vitamin C.

244.

Shanti, a domestic helper of Mrs. Anuradha, fainted while mopping the floor. Mrs. Anuradha immediately took her to the nearby hospital where she was diagnosed to be severely 'anaemic‘. The doctor prescribed an iron rich diet and multivitamins supplement to her. Mrs. Anuradha supported her financially to get the medicines. After a month, Shanti was diagnosed to be normal. After reading the above passage, answer the following questions: (i) What values are displayed by Mrs. Anuradha? (ii) Name the vitamin whose deficiency causes 'pernicious anaemia‘. (iii) Give an example of a water soluble vitamin.

Answer»

(i) Helpfulness, caring, generosity, kindness attitude towards poor.

(ii) Vitamin B₁₂.

(iii) Vitamin C.

Discussion

245.	The two polynucleotide chains in DNA areA. parallelB. discontinuousC. antiparallelD. semiconservative
Answer» Correct Answer - C In 1953 James Watson and Francis Crick suggested that in a DNA molecule there are two polynucleotide chains arranged antiparallel or in opposite directions.

Discussion

246.	Which statementsare correct?A. Lactose is a disaccharide and is a reducing sugar.B. `alpha`-D-glucopyranoside and `beta` - D-glucopyranose are anomers.C. Methyl `-alpha`-D-glucopyranoside has an acetal structure and is a non-reducing sugar.D. `alpha`-D-Glucopyranose has a hemiacetal structure ans is a reducing sugar.
Answer» Correct Answer - A::B::C::D

Discussion

247.	The structure of a basic amino acid, lysine, is given below: `(HOOC-underset(.^(o+)NH_(3))underset(\|)(C)H-(CH_(2))_(3)-CH_(2)overset(o+)(N)H_(3))(A)` The `pK_(a_1),pK_(a_2),` and `PK_(a_3)` of `(A)`, respectively, are: `2.18,8.95`, and `10.53`. What is the `pH` at isoelectric points `(pI)`?A. `(pK_(a_(1))+pK_(a_(2)))/(2)`B. `(pK_(a_(1))+pK_(a_(3)))/(2)`C. `(pK_(a_(2))+pK_(a_(3)))/(2)`D. `(pK_(a_(1))+pK_(a_(2))+pK_(a_(3)))/(3)`
Answer» Correct Answer - C

Discussion

248.	Polynucleotide chain isA. Polyamide chainB. polyster chainC. polypeptide chainD. polyglycosidic chain
Answer» Correct Answer - B

Discussion

249.	`HOOC-CH_(2)-NH-overset(O)overset(\|\|)C-overset(CH_(2)-Ph)overset(\|)(CH)-NH-overset(O)overset(\|\|)C-overset(Me)overset(\|)CH-NH_(2)` what will the correct representation of the above tripeptide?A. Gly-Phe-AlaB. Ala-Gly-PheC. Gyl-Ala-PheD. Ale-Phe-Gly
Answer» Correct Answer - d Peptide chain grow and written from N-terminal to C-terminal so give tripeptide is Ala-Phe-Gly.

Discussion

250.	`CH_(3)-overset(overset(NH)(\|))(CH)-COOH overset((X))rarr CH_(2)- overset(overset(NH_(2))(\|))(CH_(2))OH` The reagent `(X)` can be.A. `H_(2)//Pd//BaSO_(4)//`quinolineB. `NaBH_(4)`C. `LiAlH_(4)`D. `CH_(3)Mgl`
Answer» Correct Answer - C `CH_(3)-overset(overset(NH_(3))(\|))(CH)-COOH overset(LiAlH_(4))(rarr) CH_(3)-overset(overset(NH_(2))(\|))(CH)-CH_(2)OH`, hence `X` is `LiAlH_(4)`.

Discussion

Explore topic-wise InterviewSolutions in .

Phosphodiester linkage present betweenA. 1 and 2 carbon atoms of two pentose sugarB. 3 and 5 carbon atoms of two pentose sugarC. 2 and 3 carbon atoms of two pentose sugarD. 1 and 3 carbon atoms of two pentose sugar

Pentose sugar present in RNA isA. `beta`-D-riboseB. `alpha`-D-riboseC. `beta`-D-2-deoxyriboseD. `alpha`-D-deoxyribose

Which of the following is used for making mucilage for postal stamps?A. DextrinB. PectinC. ReffinoseD. Melibiose

Why are hormones known as ‘glandular juice’?

The conversion of protein to amino acids takes place by which of the following enzyme?(a) Lipase(b) Maltase(c) Trypsin(d) Renin

Number of the thyroid gland in humans is(a) One(b) Two(c) Three(d) Four

Why are hormones known as “Chemical messengers”?

Chemical messengers are(a) Hormones(b) Enzymes(c) Vitamins(d) Nucleic acids

EnzymesA. have optimum activity at body temperatureB. consists of nuclei acidsC. carbohydrateD. have all these properties

The sequence in nucleic acids is(a) Base – sugar – phosphate(b) Sugar – base – phosphate(c) Phosphate – base – sugar(d) Base – phosphate-sugar

The nucleic acids are broken into nucleotides by………A. AmylasesB. NucleasesC. LipasesD. Proteases

In nucleic acids, the sequence isA. Phosphate-Base-SugarB. Sugar-Base-PhosphateC. base-phosphate-sugarD. None

Enzymes in the living systemsA. provide energyB. provide immunityC. transport oxygenD. catalyse biochemical processes

Enzymes belog to the class of compoundsA. polysaccharideB. polypeptidesC. polynitrogen heterocyclic compoundD. hydrocarbons

Protein is a polymer ofA. glucoseB. tetephathalic acidC. amino acidsD. glycol

Which amino acid has no assymmetric carbon atom?A. histidineB. glycineC. `alpha`-alanineD. threonim

Which of the following is not present in nucleotide?A. GuanineB. CytosineC. adenineD. Thyroxine

Which of the following is found in cod-liver oil ?A. AB. `B_(12)`C. `B_(1)`D. C.

Which of the following is a molecular disease?A. allergyB. cancerC. german measlesD. sickel cell anemia.

Vitamin A is present inA. liverB. milkC. green vegetablesD. all.

Which of the following is capable of forming a zwitter ion ?A. `NH_(2)CH_(2)CO OH`B. `CH_(3)CO OH`C. `CH_(3)CH_(2)NH_(2)`D. `C Cl_(3)NO_(2)`.

Glycoproteins containA. Protein and fatB. Protein and saltC. Protein and vitaminD. Protein and carbohydrates

The prosthetic group in glycoproteins isA. carbohydrateB. fatC. vitaminD. nucleic acid

Insulin is secreted byA. stomachB. pancreasC. lungsD. none

The chemical substance which acts as emulsifier is:A. phosphoric acidB. fatty acidC. bile acidsD. mineral acids (HCl).

Choose the correct non-protein amino acidA. hydroxyprolineB. hydroxylysineC. cysteineD. `gamma` amino butyric acid

The two polypeptides of human insulin are linked together byA. Hydrogen bondsB. Phosphodiester bondC. Covanlent bondD. Disulphide bridges

Antibodies that help to fight infectious agents areA. PolysaccharidesB. Amino acidsC. ProteinsD. Glucose

Primary structure of protein is due toA. sequence in which `alpha`-amino acids are linked to one anotherB. sequence in which amino acid of one polypeptide chain are joined to other chainC. the folding patterns of polypeptide chainsD. the pattern in which the polypeptide chains are arranged.

Mark the incorrect example.A. Keratin and myosin-Fibrous proteinsB. Insulin and albumins -Globular proteinsC. Glycylalanine-DipeptideD. Enzymes and haemoglobin -Derived proteins

Enumerate the reactions of `D`-Glucose which cannot be explained by its open-chain structure.

Enumerate the reactions of D-glucose which cannot be explained by its open-chain structure.

With reference to DNA, mention the types of(a) Pyrimidine bases(b) Purine bases

Which of the following are purine bases?A. GuanineB. AdenineC. ThymineD. Uracil

Which of the following monosaccharides are present as five membered cyclic structure (furanose structure)?(i) Ribose(ii) Glucose(iii) Fructose(iv) Galactose

Which of the following are purine bases?(i) Guanine(ii) Adenine(iii) Thymine(iv) Uracil

In fibrous proteins, polypeptide chains are held together by........ .A. van der Waals forcesB. electrostatic forces of attractionC. hydrogen bondsD. covalent bonds.

In fibrous proteins, polypeptide chains are held together by ___________.(i) van der Waals forces(ii) disulphide linkage(iii) electrostatic forces of attraction(iv) hydrogen bonds

In fibrous proteins, polypeptide chains are held together by........ .A. van der Waals forcesB. disulphide linkageC. electrostatic forces of attractionD. hydrogen bonds

Give the sources of the following vitamins- A,B1,B2,B6,B12,C

Name the deficiency diseases due to following vitamins - A,B1,B2,B6,B12,C

The two polynucleotide chains in DNA areA. parallelB. discontinuousC. antiparallelD. semiconservative

Polynucleotide chain isA. Polyamide chainB. polyster chainC. polypeptide chainD. polyglycosidic chain

`HOOC-CH_(2)-NH-overset(O)overset(||)C-overset(CH_(2)-Ph)overset(|)(CH)-NH-overset(O)overset(||)C-overset(Me)overset(|)CH-NH_(2)` what will the correct representation of the above tripeptide?A. Gly-Phe-AlaB. Ala-Gly-PheC. Gyl-Ala-PheD. Ale-Phe-Gly

`CH_(3)-overset(overset(NH)(|))(CH)-COOH overset((X))rarr CH_(2)- overset(overset(NH_(2))(|))(CH_(2))OH` The reagent `(X)` can be.A. `H_(2)//Pd//BaSO_(4)//`quinolineB. `NaBH_(4)`C. `LiAlH_(4)`D. `CH_(3)Mgl`