3593 + Interview Questions in BIOMOLECULES IN GENERAL AWARENESS Page 33 InterviewSolution

1601.	(i) Given one structural difference between amylose and amylopectin. (ii) Name the protein and its shape present in oxygen carrier in hyman body. (iii) Name two fat storing tissues in human body.
Answer» (i) Amlose is a long unbranched chain polymer of `alpha-D(+)` glucose while amylopectin chain polymer of `alpha-D(+)` glucose. (ii) It is known as globular protein and its shape is shaperical. (iii) These are liver and adipose tissues.

Discussion

1602.	What is Peptide bond?
Answer» Formed between the carboxyl (-COOH) group of one amino acid and the amino (-NH₂) group of the next amino acid with the elimination of water moeity.

Discussion

1603.	List the Structure of Proteins?
Answer» (a) Primary structure : Is found in the form of linear sequence of amino acids. First amino acid is called N-terminal amino acid and last amino acid is called C-terminal amino acid. (b) Secondary structure : Polypeptide chain undergoes folding or coiling which is stabilized by hydrogen bonding. Right handed helices are observed. e.g., fibrous protein in hair, nails. (c) Tertiary structure : Long protein chain is folded upon itself like a hollow wollen ball. Gives a 3-dimensional view of protein, e.g., myosin. (d) Quaternary structure : Two or more polypeptides with their foldings and coilings are arranged with respect to each other. e.g., Human haemoglobin molecule has 4 peptide chains - 2a and 2b subunits.

1603.

List the Structure of Proteins?

Answer»

(a) Primary structure : Is found in the form of linear sequence of amino acids. First amino acid is called N-terminal amino acid and last amino acid is called C-terminal amino acid.

(b) Secondary structure : Polypeptide chain undergoes folding or coiling which is stabilized by hydrogen bonding. Right handed helices are observed. e.g., fibrous protein in hair, nails.

(c) Tertiary structure : Long protein chain is folded upon itself like a hollow wollen ball. Gives a 3-dimensional view of protein, e.g., myosin.

(d) Quaternary structure : Two or more polypeptides with their foldings and coilings are arranged with respect to each other. e.g., Human haemoglobin molecule has 4 peptide chains - 2a and 2b subunits.

Discussion

1604.	Define Phospholipids. Give an example.
Answer» Phospholipids are compound lipids with phosphorus and a phosphorylated organic compound. e.g., Lecithin.

1604.

Define Phospholipids. Give an example.

Answer»

Phospholipids are compound lipids with phosphorus and a phosphorylated organic compound.

e.g., Lecithin.

Discussion

1605.	What is Micromolecules ?
Answer» Molecules which have molecular weights less than one thousand dalton is called Micromolecules.

Discussion

1606.	Which of the following compound will not give yellow ppt.with `I_(2)/OH^(-)`A. B. C. D. `CH_(3)-CHO`
Answer» Correct Answer - c

Discussion

1607.	Read the given statements and select the option that correctly sorts these with respect to A and B in the given flow chart. (i) Molecular weight ranging from 18 to 800 daltons (Da) approximately (ii) Proteins, nucleic acids, polysaccharides and lipids (iii) Contain chemicals that have molecular weight more than 800 Da (iv) Has monomers (v) Generally has polymers A. `{:(" A",," B"),("(i),(ii),(iii)",,"(iv),(v)"):}`B. `{:(" A",," B"),("(ii),(iv)",,"(i),(iii),(v)"):}`C. `{:(" A",," B"),("(i),(iv)",,"(ii),(iii),(v)"):}`D. `{:(" A",," B"),("(i),(iii),(v)",,"(ii),(iv)"):}`
Answer» Correct Answer - C

Discussion

1608.	The compound A gives folloewing reactions : Its structure can be :A. `CH_(2)=CH-(CH_(2))_(2)-underset(O)underset(\|\|)(C )-CH_(2)OH`B. `OHC-(CH_(2))_(2)-CH=CH-COOH`C. D.
Answer» Correct Answer - c

Discussion

1609.	Transition state structure of the substrate formed during an enzymatic reaction isA. transident and unstableB. permanent and stableC. transient but stableD. permanent but unstable
Answer» Correct Answer - A

Discussion

1610.	In the acetylation of glucose, which group is involved in the reactionA. CHO groupB. gtC=O groupC. alocholic OH groupD. all of these
Answer» Correct Answer - C

Discussion

1611.	Glucose is oxidised by strong oxidising agent givesA. saccharic acidB. gluconic acidC. n-hexaneD. sorbitol
Answer» Correct Answer - A

Discussion

1612.	Sucrose on hydrolysis givesA. two molecules of glucoseB. two molecules of fructoseC. One molecules each of glucose and fructoseD. one molecule each of glucose and mannose.
Answer» Correct Answer - C

Discussion

1613.	Which of the following compounds is found abundantly in nature?A. FructoseB. starchC. GlucoseD. Cellulose
Answer» Correct Answer - D

Discussion

1614.	`alpha-D (+)-`glucose and `beta-D(+)-`glucose are:A. isomersB. anomersC. epimersD. tautomers
Answer» Correct Answer - B `alpha`-D-glucose & `beta`-D-glucose differ at C-1 hence are called anomers.

Discussion

1615.	Kwashiokar is caused by the deficiency of:A. vitaminsB. hormonesC. amino acidsD. essential amino acids
Answer» Correct Answer - D Kwashiorkar is caused by the deficiency of essential amino acids.

Discussion

1616.	Which of the following is not an `alpha`-amino acid?A. glycineB. alanineC. histidineD. benzidine
Answer» Correct Answer - D Benzidine is not a `alpha`-amino acid.

Discussion

1617.	Which of the following bases is prisent in RNA in place of thymineA. UracilB. AdenineC. GuanineD. Water
Answer» Correct Answer - A

Discussion

1618.	Scurry disease is caused by the deficiency of vitaminA. `B_(1)`B. CC. KD. D
Answer» Correct Answer - B Scurvy is due to the deficiency of vitamin C .

Discussion

1619.	Which one is the complimentary base of adenine in one strand to that in the other strand of DNA?A. CytosineB. GuanineC. UracilD. Thymine
Answer» Correct Answer - D

Discussion

1620.	The end product of protein digestion is :A. peptideB. peptonesC. protonesD. `alpha`-Amino acid.
Answer» Correct Answer - D `alpha`-amino acids are the end products of hydrolysis of proteins

Discussion

1621.	The number of tripeptides formed by three different amino acids is:A. threeB. fourC. fiveD. two
Answer» Correct Answer - D Three amino acids combine together to give a tripeptide which has two peptide `(-overset(O)overset(\|\|)(C)-NH-)` linkages.

Discussion

1622.	in which form , the extra sugars is stored in the body ?A. Glucose monosaccharideB. Sucrose disaccharideC. Glycogen polysaccharideD. Fatty acid and glycerol
Answer» Correct Answer - C

Discussion

1623.	Mutarotation does not occur inA. sucroseB. D-glucoseC. L-glucoseD. none of these
Answer» Correct Answer - A Sucrose does not show mutarotation because there is hemiacetal group in it.

Discussion

1624.	Glucose `overset(H_2 O) underset("Enzyme") to C_2 H_5 OH + CO_2 + ` Energy The above reaction is an example ofA. hydrolysisB. saponificationC. dehydrationD. fermentation
Answer» Correct Answer - D Conversion of glucose into ethyl alcohol, `C_(2)H_(5)OH` in the presence of enzymes is fermentation

Discussion

1625.	Glucose reacts with acetyl chloride to form:A. MonoacetateB. Tetra-acetateC. Penta-acetateD. Hexa-acetate
Answer» Correct Answer - C `CHO(CHOH)_(4)CH_(2)OH+5CH_(3)COCl to CHO(CHOCOCH_(3)_(4)CH_(2)OCOCH_(3)+5HCl`

Discussion

1626.	Vitamin `A` is called:A. Ascorbic acidB. RetinolC. CalciferolD. Tocopherol
Answer» Correct Answer - B

Discussion

1627.	Which carbohydrate is an essential constituent of plant cells?A. starchB. SucroseC. CelluloseD. glycogen
Answer» Correct Answer - C

Discussion

1628.	Which of the following is not an essential constituent of carbohydrate?A. NB. OC. CD. H
Answer» Correct Answer - A

Discussion

1629.	Which carbohydrate is an essential constituent of plant cells?A. StarchB. celluloseC. sucroseD. vitamins
Answer» Correct Answer - B Cellulose (a carbohydrate) is an essential constituent of plant cells.

Discussion

1630.	Which carbohydrate is an essential contituent of plant cells?A. StarchB. CelluloseC. SucroseD. Vitamins
Answer» Correct Answer - B

Discussion

1631.	Among the following the achiral amino acid is:A. EthylalanineB. MethylglycineC. `2`-HydroxymethylserineD. Tryptophan
Answer» Correct Answer - C It does not contain a chiral centre `HOH_(2)C-overset(CH_(2)OH)overset(\|)underset(NH_(2))underset(\|)(C)-COOH`

Discussion

1632.	Among the following L-serine isA. B. C. D.
Answer» Correct Answer - c

Discussion

1633.	Which of the following amino acids is not opticallyA. LysineB. TyrosineC. GlycineD. Alanine
Answer» Correct Answer - C Glycine, `HO OC-underset(H)underset(\|)overset(H)overset(\|)(C)-NH_(2)` is not optically active.

Discussion

1634.	Statement I: Thymine occures in `RNA`. Statement II: `RNA` controls the synthesis of proteins.A. Statement `I` is true, Statement `II` is true, Statements `II` is the correct explanation of Statement `I`.B. Statement `I` is true, Statement `II` is true, Statement `II` is not the correct explanation of Statement `I`.C. Statement `I` is true, Statement `II` is false.D. Statement `I` is false, Statement `II` is true.
Answer» Correct Answer - D

Discussion

1635.	A mixture contains three amino acids `A (pH = 3.2)`, `B (pH = 5.7)` and `C (pH = 9.7)` When it is subjected to electrophoresis at pH 7.7, in which direction will each component of the mixture move?A. A to anode, B and C to cathodeB. A to anode, B no movement, C to cathodeC. A and B to anode C to cathodeD. A to cathode, B no movement, C to anode
Answer» Correct Answer - C Since `pH` of `A` and `B` is less than `pH` (7.7), so they will exist in anionic form and will migrate towards anode. Since `pI` of `C` is greater than the `pH` of medium, so it will exist in cationic form and migrate towards cathode.

Discussion

1636.	Which of the following is a heterocyclic amino acid?A. TryptophanB. PhenylalanineC. GlycineD. Alanine
Answer» Correct Answer - A Tryptopan is a heterocyclic amino acid.

Discussion

1637.	The following carbohydrate is: A. a ketchexoseB. an aldohexoseC. an `alpha`-furanoseD. an `alpha`-pyranose
Answer» Correct Answer - B This structure is an example of pyranose and aldohexose. Since the given carbohydrate has five carbon and one oxygen atom is the ring `C_(1)-OH` is `beta`-oriented, therefore, it is a `beta-pyranose. Thus, option (b) is correct

Discussion

1638.	Gums are:A. polysaccharides of more than one type of monosaccharidesB. used as a thicking agentC. used for improvement of texture in food industryD. all of the above
Answer» Correct Answer - D These are facts about gums.

Discussion

1639.	Which organisms store carbohydrates as glycogen ?
Answer» Animals, bacteria and fungi.

Discussion

1640.	Name the 3 kinds of RNAs and a self-reproducing component of chromosomes.
Answer» Ribosomal RNA, messenger RNA and transfer RNA, DNA.

Discussion

1641.	A pure protein should normally haveA. two endsB. one endC. three endsD.
Answer» Correct Answer - a

Discussion

1642.	A pure protein should normally haveA. Two endsB. One endC. Three endsD. No ends
Answer» Correct Answer - A

Discussion

1643.	Glycogen is a homonpolymer made up ofA. Glucose unitsB. Galactose untisC. Ribose unitsD. Aminoacids
Answer» Correct Answer - A

Discussion

1644.	Glycogen is a homonpolymer made up ofA. Glucose unitsB. Galactose unitsC. Ribose unitsD. Amino acids
Answer» Correct Answer - a

Discussion

1645.	The primary structure of a protein molecule hasA. two endsB. one endC. three endsD. no ends.
Answer» Correct Answer - A Primary structure of a protein is simply the amino acid sequence which has two ends the caboxyl and amino terminals.

Discussion

1646.	Which of the following is an uncatalysed metabolic conversion in living system ?A. `CO_(2)` dissolving into waterB. Glucose converted in pyruvic acidC. Glucose becomes lactic acid in our skeletal muscleD. None of the above.
Answer» Correct Answer - D (D) There is no uncatalysed metabolic conversion in living system

Discussion

1647.	How much energy is released by hydrolysis of ATP ?
Answer» About 8.9 Kcal and 6.5 Kcal per mole from 3rd and 2nd phosphate bonds respectively.

Discussion

1648.	Name the processes by which macromolecules form/breakdown from/into micromolecule monomers. List the common macromolecules.
Answer» Condensation/hydrolysis, polysaccharides (glycans), proteins and nucleic acids.

Discussion

1649.	Which one of the biomolecule is insoluble in water? (a) Keratin (b) Haemoglobin (c) Ribonuclease (d) Aclenine
Answer» Keratin is insoluble in water.

Discussion

1650.	The bond that determines the secondary structure of proteins is ……… (a) coordinate bond (b) covalent bond (c) hydrogen bond (d) peptide bond
Answer» (c) hydrogen bond

Discussion

Explore topic-wise InterviewSolutions in .

(i) Given one structural difference between amylose and amylopectin. (ii) Name the protein and its shape present in oxygen carrier in hyman body. (iii) Name two fat storing tissues in human body.

What is Peptide bond?

List the Structure of Proteins?

Define Phospholipids. Give an example.

What is Micromolecules ?

Which of the following compound will not give yellow ppt.with `I_(2)/OH^(-)`A. B. C. D. `CH_(3)-CHO`

The compound A gives folloewing reactions : Its structure can be :A. `CH_(2)=CH-(CH_(2))_(2)-underset(O)underset(||)(C )-CH_(2)OH`B. `OHC-(CH_(2))_(2)-CH=CH-COOH`C. D.

Transition state structure of the substrate formed during an enzymatic reaction isA. transident and unstableB. permanent and stableC. transient but stableD. permanent but unstable

In the acetylation of glucose, which group is involved in the reactionA. CHO groupB. gtC=O groupC. alocholic OH groupD. all of these

Glucose is oxidised by strong oxidising agent givesA. saccharic acidB. gluconic acidC. n-hexaneD. sorbitol

Sucrose on hydrolysis givesA. two molecules of glucoseB. two molecules of fructoseC. One molecules each of glucose and fructoseD. one molecule each of glucose and mannose.

Which of the following compounds is found abundantly in nature?A. FructoseB. starchC. GlucoseD. Cellulose

`alpha-D (+)-`glucose and `beta-D(+)-`glucose are:A. isomersB. anomersC. epimersD. tautomers

Kwashiokar is caused by the deficiency of:A. vitaminsB. hormonesC. amino acidsD. essential amino acids

Which of the following is not an `alpha`-amino acid?A. glycineB. alanineC. histidineD. benzidine

Which of the following bases is prisent in RNA in place of thymineA. UracilB. AdenineC. GuanineD. Water

Scurry disease is caused by the deficiency of vitaminA. `B_(1)`B. CC. KD. D

Which one is the complimentary base of adenine in one strand to that in the other strand of DNA?A. CytosineB. GuanineC. UracilD. Thymine

The end product of protein digestion is :A. peptideB. peptonesC. protonesD. `alpha`-Amino acid.

The number of tripeptides formed by three different amino acids is:A. threeB. fourC. fiveD. two

in which form , the extra sugars is stored in the body ?A. Glucose monosaccharideB. Sucrose disaccharideC. Glycogen polysaccharideD. Fatty acid and glycerol

Mutarotation does not occur inA. sucroseB. D-glucoseC. L-glucoseD. none of these

Glucose `overset(H_2 O) underset("Enzyme") to C_2 H_5 OH + CO_2 + ` Energy The above reaction is an example ofA. hydrolysisB. saponificationC. dehydrationD. fermentation

Glucose reacts with acetyl chloride to form:A. MonoacetateB. Tetra-acetateC. Penta-acetateD. Hexa-acetate

Vitamin `A` is called:A. Ascorbic acidB. RetinolC. CalciferolD. Tocopherol

Which carbohydrate is an essential constituent of plant cells?A. starchB. SucroseC. CelluloseD. glycogen

Which of the following is not an essential constituent of carbohydrate?A. NB. OC. CD. H

Which carbohydrate is an essential constituent of plant cells?A. StarchB. celluloseC. sucroseD. vitamins

Which carbohydrate is an essential contituent of plant cells?A. StarchB. CelluloseC. SucroseD. Vitamins

Among the following the achiral amino acid is:A. EthylalanineB. MethylglycineC. `2`-HydroxymethylserineD. Tryptophan

Among the following L-serine isA. B. C. D.

Which of the following amino acids is not opticallyA. LysineB. TyrosineC. GlycineD. Alanine

Which of the following is a heterocyclic amino acid?A. TryptophanB. PhenylalanineC. GlycineD. Alanine

The following carbohydrate is: A. a ketchexoseB. an aldohexoseC. an `alpha`-furanoseD. an `alpha`-pyranose

Gums are:A. polysaccharides of more than one type of monosaccharidesB. used as a thicking agentC. used for improvement of texture in food industryD. all of the above

Which organisms store carbohydrates as glycogen ?

Name the 3 kinds of RNAs and a self-reproducing component of chromosomes.

A pure protein should normally haveA. two endsB. one endC. three endsD.

A pure protein should normally haveA. Two endsB. One endC. Three endsD. No ends

Glycogen is a homonpolymer made up ofA. Glucose unitsB. Galactose untisC. Ribose unitsD. Aminoacids

Glycogen is a homonpolymer made up ofA. Glucose unitsB. Galactose unitsC. Ribose unitsD. Amino acids

The primary structure of a protein molecule hasA. two endsB. one endC. three endsD. no ends.

Which of the following is an uncatalysed metabolic conversion in living system ?A. `CO_(2)` dissolving into waterB. Glucose converted in pyruvic acidC. Glucose becomes lactic acid in our skeletal muscleD. None of the above.

How much energy is released by hydrolysis of ATP ?

Name the processes by which macromolecules form/breakdown from/into micromolecule monomers. List the common macromolecules.

Which one of the biomolecule is insoluble in water? (a) Keratin (b) Haemoglobin (c) Ribonuclease (d) Aclenine

The bond that determines the secondary structure of proteins is ……… (a) coordinate bond (b) covalent bond (c) hydrogen bond (d) peptide bond