3593 + Interview Questions in BIOMOLECULES IN GENERAL AWARENESS Page 4 InterviewSolution

151.	If one strand of DNA has the sequence ATGCTTGA, the sequence in the complimentary strand would beA. TCCGAACTB. TACGTACTC. TACGAACTD. TAGCTAGT
Answer» Correct Answer - C

Discussion

152.	RNA and DNA are chiral molecules, their chirality is due toA. D-sugar componentB. L-sugar componentC. chiral basesD. chiral phosphate ester unit.
Answer» Correct Answer - A

Discussion

153.	RNA and DNA are chiral molecules. Their chirality is due to :A. L-sugar componentB. Chiral basesC. chiral phosphate ester unitsD. D-sugar component
Answer» Correct Answer - D RNA and DNA molecules have ribose and deoxyribose sugar respectively. Both are chiral, their chirality is due to D-ribose or deoxyribose sugar components.

Discussion

154.	RNA and DNA are chiral molecules. Their chirality is due to :A. Chiral basesB. Chiral phosphate ester unitsC. D-sugar componentD. L-sugar component.
Answer» Correct Answer - C The sugar present in DNA is D(-)-2-deoxy-ribose and in RNA it is D(-) ribose

Discussion

155.	DNA and RNA have chiral asymmetric carbon atom. The reason for their chirality is(a) Asymmetric base(b) D-sugar component(c) L-sugar component(d) Asymmetric phosphate ester units
Answer» (d) Asymmetric phosphate ester units

Discussion

156.	In DNA, the complimentary bases areA. Adenine and guanine, thymine and cytosineB. Adenine and thymine, cytosine and guanineC. Adenine and cytosine, g uanine and thymineD. Thymine and uracil, cytosine and guanine
Answer» Correct Answer - B

Discussion

157.	RNA and DNA are chiral molecules. Their chirality is due to :A. chiral phosphate ester linkageB. D-sugar componentC. L-sugar componentD. chiral base
Answer» Correct Answer - B

Discussion

158.	In DNA hydrogen bonding of cytocine withA. uracilB. guanineC. AdenineD. thymine
Answer» Correct Answer - B

Discussion

159.	Which enzyme is utilised in the conversion of galactose to glucose? (a) Maltose(b) Epimerase (c) Invertase (d) Zymase
Answer» (b) Epimerase

Discussion

160.	Which one of the following on hydrolysis give galactose and glucose? (a) Maltose (b) Cellulose (c) Lactose (d) Sucrose
Answer» Lactose on hydrolysis give galactose and glucose.

Discussion

161.	Glucose `overset(NH_(2)OH)rarrAunderset("excess")overset(AcOAc)rarrBunderset(H_(2)O,/_)overset(Ag_(2)O)rarrC`. Number of carbon in C are ………… .
Answer» Correct Answer - 5

Discussion

162.	Glucose`overset(HCN)rarrAunderset(pdBaSO_(4))overset(H_(2))rarrBoverset(H_(3)O^(o+))rarrC`. Number of carbon in C are………. .
Answer» Correct Answer - 7

Discussion

163.	What changes occur in the nature of egg proteins on boiling?
Answer» On boiling, protein of egg gets denatured. Thus, due to coagulation water get absorbed.

Discussion

164.	Give scientific reasons :On boiling, egg albumin becomes opaque white.
Answer» Upon boiling the egg, denaturation αcurs. During denaturation, secondary and tertiary structures are destroyed, but primary structure remains intact. Egg contains soluble globular proteins, which forms insoluble fibrous proteins (opque) on boiling egg.

Discussion

165.	Assertion: maltose is reducing sugar Reason : In maltose 1-2 glycosidic linkage is present so free CHO group present which is responsibel for reducing nautreA. If both assertion & Reason are ture & the Reason is a correct explanation of the AssertionB. If both Assertion & Reason ar True but Reason is not a correct explantation of the AssertionC. If Assertion is True but the Reason is FalseD. If both Assertion & Reason are false
Answer» Correct Answer - C

Discussion

166.	Say TRUE or FALSE:The coagulation of egg white on boiling is an example of protein denaturation.
Answer» True The coagulation of egg white on boiling is an example of protein denaturation

Discussion

167.	On boiling the egg, what structural changes are taking place in the egg white ?A. The colour of the egg changes from colourless to white.B. `2^(@)` and `3^(@)` structures are destroyed but `1^(@)` structure remains intact.C. `1^(@),2^(@)and 3^(@)` structures of egg are destroyed.D. A reversible change takes place which can be reversed by decreasing the temperature .
Answer» Correct Answer - B During denaturation of proteins, `2^(@) and 3^(@)` structures are destroyed but primary structure remains intact.

Discussion

168.	Answer the following : (a) Out of socrose and maltose, which is a reducing sugar ? (b) Can denaturation of egg proteins be reversed ? (c ) To which class of biomolecules, pectins belong ? (d) Name the monomer units of starch. (e ) NAme three products which can be obtained from cellulose. (f) Classify the following into globular and fibrous proteins : insulin, haemoglobin, fibroin, collagen, albumin, myosin.
Answer» (a) Maltose is a reducing sugar. (b) No it cannot be reversed. (c ) Pectins are carbohydrates in nature. (d) The monomer units of starch are `alpha-D(+)` glucose molecules. (e ) Products obtained from cellulose are rayons, celluloes acetate and ethyl cellulose. (f) Globular proteins : Insulin, haemoglobin, albumin Fibraous proteins : Fibroi, collagen, myosin.

Discussion

169.	Polymer used in bullet proof glass is:A. `PMMA`B. LexanC. NormexD. Kevlar
Answer» Correct Answer - B Lexan (a polycarbonate or a polyester) is used for bullet proof windows and safety or crash helmets.

Discussion

170.	Cane sugar on hydrolysis givesA. glucose + lactoseB. fructose + fructoseC. glucose + fructoseD. glucose + glucose
Answer» Correct Answer - C Cane sugar on hydrolysis gives glucose and fructose

Discussion

171.	Glucose on prolonged heating with HI givesA. n-HexaneB. 1-HexaneC. Hexanoic acidD. 6-iodohexane
Answer» Correct Answer - A `CHO(CHOH)_(4)CH_(2)OH overset(HI)underset("Heat")rarr underset("n-hexane")(CH_(3)(CH_(2))_(4)CH_(3))`

Discussion

172.	The change in optical rotation with time of freshly prepared solution of sugar is known as :A. tautomerismB. racemisationC. specific rotationD. mutarotation
Answer» Correct Answer - D A spontaneous change in the specific rotation of a solution of an optically active compound is called mutarotation.

Discussion

173.	The change in optical rotation with time of freshly prepared solution of sugar is known as :A. Specific rotationB. inversionC. Rotatory motionD. mutarotation
Answer» Correct Answer - D The change in optical rotation with time of freshly prepared solution of sugar (with enzymes) is known as inversion.

Discussion

174.	Select branched polymer of glucose :A. AmylopectineB. CelluloseC. GlycogenD. Amylose
Answer» Correct Answer - a,c

Discussion

175.	Assertion `:` Cellulose acetate is a semisynthetic polymer. Reason `:` Chemical name of cellulose acetate polymer is rayon.A. If both the assertion and reason are true and the reason is the correct explanation of the assertionB. If both assertion and reason are true but reason is not the correct explanation of the assertion.C. If assertion is true but reason is false.D. If assertion is false but reason is true.
Answer» Correct Answer - B Assertion and reason both are correct, both reason cannot explain the assertion.

Discussion

176.	The polysaccharide present int eh exoskeletons of arthropods isA. Hyaluronic acidB. ChitinC. CelluloseD. Glycogen
Answer» Correct Answer - B

Discussion

177.	In maltose, glycosidic linkage is present between the two glucose units at positions :(a) 1, 2 (b) 1, 1 (c) 1, 3 (d) 1, 4
Answer» Option : (d) 1, 4

Discussion

178.	`alpha-D` glucose and `beta-D`-glucose differ from each other due to the difference in one of the carbon atoms, with respect to its.A. Number of `OH` groupsB. ConfigurationC. ConformationD. Size of hemiacetal ring
Answer» Correct Answer - B `alpha-D` glucose and `beta-D`-glucose differ in configuration at `C -1`.

Discussion

179.	What are gums made of? Is Fevicol different?
Answer» Gums are polymeric substances which come under secondary metabolites of plants. Fevicol is a synthetic gum.

Discussion

180.	What are gums made of ? Is fevicol different ?
Answer» Gums are hetero-polysaccharides. They are made from two or more different types of monosaccharides. On the other hand, fevicol is polyvinyl alcohol (PVA) glue. It is not a polysaccharide.

Discussion

181.	What are biomolecules?
Answer» Biomolecules or biological,molecules are the elements occurring in the molecular form, in the living systems.

Discussion

182.	Find out a qualitative test for proteins, fats and oils, amino acids and test any fruit juice, saliva, sweat and urine for them.
Answer» Biuret Test: Biuret test is done for protein. Appearance of violet colour in the solution confirms the presence of protein. Biuret (H₂NCONHCONH₂) reacts with copper ion in a basic solution and gives the violet colour. Liebermann-Burchard Test: This test is done for cholesterol. The reagent is a mixture of acetic anhydride and sulphuric acid. Appearance of green colour confirms the presence of cholesterol. Grease Test: This test is done for certain oils. This is a simple test which involves rubbing the given sample on cloth or paper. Appearance of a translucent spot shows the presence of oil.

182.

Find out a qualitative test for proteins, fats and oils, amino acids and test any fruit juice, saliva, sweat and urine for them.

Answer»

Biuret Test: Biuret test is done for protein. Appearance of violet colour in the solution confirms the presence of protein. Biuret (H₂NCONHCONH₂) reacts with copper ion in a basic solution and gives the violet colour.

Liebermann-Burchard Test: This test is done for cholesterol. The reagent is a mixture of acetic anhydride and sulphuric acid. Appearance of green colour confirms the presence of cholesterol.

Grease Test: This test is done for certain oils. This is a simple test which involves rubbing the given sample on cloth or paper. Appearance of a translucent spot shows the presence of oil.

Discussion

183.	Describe the important properties of enzymes.
Answer» Properties of enzymes An enzyme like any protein has primary structure (amino acid sequence). Secondary structure and tertiary structure Every enzyme has an ’active site’ which is a crevice into which the substrate fits. Enzymes are specific in their action. Particular enzyme acts on a particular substrate. But different enzymes catalyse a unique chemical or metabolic reaction. Enzymes generally function in a narrow range of temperature and pH. Activity declines both below and above optimum temperature and pH. The higher the affinity of the enzyme for its substrate the greater is its catalytic activity. The activity of an enzyme is also sensitive to the presence of specific chemicals that bind to the enzyme. For eg: Inhibitors that shuts off enzyme activity and Co-factors that facilitates catalytic activity. Enzymes retain their identity at the end of the reaction

183.

Describe the important properties of enzymes.

Answer»

Properties of enzymes

An enzyme like any protein has primary structure (amino acid sequence). Secondary structure and tertiary structure
Every enzyme has an ’active site’ which is a crevice into which the substrate fits.
Enzymes are specific in their action. Particular enzyme acts on a particular substrate. But different enzymes catalyse a unique chemical or metabolic reaction.
Enzymes generally function in a narrow range of temperature and pH. Activity declines both below and above optimum temperature and pH.
The higher the affinity of the enzyme for its substrate the greater is its catalytic activity.
The activity of an enzyme is also sensitive to the presence of specific chemicals that bind to the enzyme.
For eg: Inhibitors that shuts off enzyme activity and Co-factors that facilitates catalytic activity.
Enzymes retain their identity at the end of the reaction

Discussion

184.	Find out how much cellulose is made by all the plants in the biosphere and compare it with how much of paper is manufactured by man and hence what is the consumption of plant material by man annually. What a loss of vegetation!
Answer» As per a UN report of 2006, about 312 million tons of carbon is stored as biomass of plants. About 10% of the total available cellulose is used in paper making. This appears as a small figure; compared to the total biomass. But when the lost forest cover is replaced by monoculture plantations, it makes the situation grim. Moreover, wood is also cut for many other purposes. Hence, there is a huge loss of vegetation every year.

Discussion

185.	Describe the important properties of enzymes.
Answer» Enzymes are biological catalysts. No metabolic reaction takes place without an enzyme. Enzymes are highly specific to the substrates. Unlike inorganic catalysts, enzymes are susceptible to high temperatures and cease to act after optimum temperature. Enzymes greatly hasten the rate of metabolic reactions.

Discussion

186.	What do you understand from names (a) aldo pentose and (b) ketoheptose ?
Answer» Aldo pentose : If a monosacchrides cantain 5 carbons with a aldehyde group then it is called aldo pentose Ketoheptose : If a monosacchrides cantain seven carbons with a ketone group then it is called ketoheptose.

Discussion

187.	Match the column I and Column II using the code given below the column.column Icolumn IIA. Aldo pentose1. RibuloseB. Keto pentose2. FructoseC. Aldo hexose3. RiboseD. Keto hexose4. GlucoseABCDa3142b1234c4321d2413
Answer» (a) 3 1 4 2

Discussion

188.	Match the column I and Column II using the code given below the column.column Icolumn IA. Fruit sugar1. LactoseB. Blood sugar2. FructoseC. Malt sugar3. GlucoseD. Milk sugar4. MaltoseABCDa1234b4123c3412d2341
Answer» (d) 2 3 4 1

Discussion

189.	Match the column I and Column II using the code given below the column.column Icolumn IIA. Proteins1. Induces physiological repsonseB. Lipids2. Bio catalystC. Enzymes3. Structural back boneD. Homones4. Protective coating in aquatic organismABCDa3421b1234c4312d2143
Answer» (a) 3 4 2 1

Discussion

190.	Match the column I and Column II using the code given below the column.column Icolumn IIA. Vitamin A 1. PellagraB. Vitamin B12. XerophthalmiaC. Vitamin B23. Beri BeriD. Vitamin B3B. CheilosisABCDa1234b3412c4123d2341
Answer» (d) 2 3 4 1

Discussion

191.	Match the column I and Column II using the code given below the column. column I column IIA. Vitamin B51. Hair lossB. Vitamin B62. Megaloblastic anaemiaC. Vitamin B73. Inadequate growthD. Vitamin B94. ConvulsionsABCDa3412b1234c4321d2143
Answer» (a) 3 4 1 2

Discussion

192.	Which metal is present in Vitamin B12 ? (a) Ca (II) (b) Zn (II) (c) Fe (II) (d) Co (III)
Answer» Co (III) is present in Vitamin B₁₂

Discussion

193.	Name the Vitamins whose deficiency cause 1. rickets 2. scurvy
Answer» 1. Vitamin – D deficiency causes rickets disease. 2. Vitamin – C deficiency causes scurvy disease

193.

Name the Vitamins whose deficiency cause 1. rickets 2. scurvy

Answer»

1. Vitamin – D deficiency causes rickets disease.

2. Vitamin – C deficiency causes scurvy disease

Discussion

194.	Match the column I and Column II using the code given below the column.column Icolumn IIA. Vitamin B121. ScurvyB. Vitamin C2. Haemorrhagic diseasesC. Vitamin D3. Pernicious anaemiaD. Vitamin K4. RickersABCDa3142b1234c4321d2413
Answer» (a) 3 1 4 2

Discussion

195.	Match the column I and Column II using the code given below the column.column Icolumn IIA. Vitamin B11. PantothenicB. Vitamin B22. NiacinC. Vitamin B33. ThiaminD. Vitamin B54. RiboflavinABCDa3412b1234c4312d2143
Answer» (a) 3 4 1 2

Discussion

196.	Match the column I and Column II using the code given below the column.column Icolumn IIA. Phylloquinone1. Vitamin CB. Tocopherol2. Vitamin AC. Ascorbic3. Vitamin KD. Retinol4. Vitamin EABCDa3412b1234c4321d2143
Answer» (a) 3 4 1 2

Discussion

197.	Prostaglandins areA. amino acidB. steroidC. fatty acidD. carbohydrate
Answer» Correct Answer - C

Discussion

198.	Protein quality depends uponA. Essential amino acidsB. Isoelectric pointC. CoagulabilityD. Quaternary structure
Answer» Correct Answer - A (A) Protein quality depends upon essential amino acids.

Discussion

199.	Prostaglandins areA. Simple proteinsB. Conjugated proteinsC. Saturated fatty acidsD. Unsaturated fatty acids
Answer» Correct Answer - D (D) Prostaglandians are unsaturated fatty acid.

Discussion

200.	Dinucleotide is obtained by joining two nucleotides together by phosphodiester linkage. Between which carbon atoms of pentose sugars of nucleotides are these linkages present? (i) 5′ and 3′ (ii) 1′ and 5′ (iii) 5′ and 5′ (iv) 3′ and 3′
Answer» (i) 5′ and 3′

Discussion

Explore topic-wise InterviewSolutions in .

If one strand of DNA has the sequence ATGCTTGA, the sequence in the complimentary strand would beA. TCCGAACTB. TACGTACTC. TACGAACTD. TAGCTAGT

RNA and DNA are chiral molecules, their chirality is due toA. D-sugar componentB. L-sugar componentC. chiral basesD. chiral phosphate ester unit.

RNA and DNA are chiral molecules. Their chirality is due to :A. L-sugar componentB. Chiral basesC. chiral phosphate ester unitsD. D-sugar component

RNA and DNA are chiral molecules. Their chirality is due to :A. Chiral basesB. Chiral phosphate ester unitsC. D-sugar componentD. L-sugar component.

DNA and RNA have chiral asymmetric carbon atom. The reason for their chirality is(a) Asymmetric base(b) D-sugar component(c) L-sugar component(d) Asymmetric phosphate ester units

In DNA, the complimentary bases areA. Adenine and guanine, thymine and cytosineB. Adenine and thymine, cytosine and guanineC. Adenine and cytosine, g uanine and thymineD. Thymine and uracil, cytosine and guanine

RNA and DNA are chiral molecules. Their chirality is due to :A. chiral phosphate ester linkageB. D-sugar componentC. L-sugar componentD. chiral base

In DNA hydrogen bonding of cytocine withA. uracilB. guanineC. AdenineD. thymine

Which enzyme is utilised in the conversion of galactose to glucose? (a) Maltose(b) Epimerase (c) Invertase (d) Zymase

Which one of the following on hydrolysis give galactose and glucose? (a) Maltose (b) Cellulose (c) Lactose (d) Sucrose

Glucose `overset(NH_(2)OH)rarrAunderset("excess")overset(AcOAc)rarrBunderset(H_(2)O,/_)overset(Ag_(2)O)rarrC`. Number of carbon in C are ………… .

Glucose`overset(HCN)rarrAunderset(pdBaSO_(4))overset(H_(2))rarrBoverset(H_(3)O^(o+))rarrC`. Number of carbon in C are………. .

What changes occur in the nature of egg proteins on boiling?

Give scientific reasons :On boiling, egg albumin becomes opaque white.

Say TRUE or FALSE:The coagulation of egg white on boiling is an example of protein denaturation.

Polymer used in bullet proof glass is:A. `PMMA`B. LexanC. NormexD. Kevlar

Cane sugar on hydrolysis givesA. glucose + lactoseB. fructose + fructoseC. glucose + fructoseD. glucose + glucose

Glucose on prolonged heating with HI givesA. n-HexaneB. 1-HexaneC. Hexanoic acidD. 6-iodohexane

The change in optical rotation with time of freshly prepared solution of sugar is known as :A. tautomerismB. racemisationC. specific rotationD. mutarotation

The change in optical rotation with time of freshly prepared solution of sugar is known as :A. Specific rotationB. inversionC. Rotatory motionD. mutarotation

Select branched polymer of glucose :A. AmylopectineB. CelluloseC. GlycogenD. Amylose

The polysaccharide present int eh exoskeletons of arthropods isA. Hyaluronic acidB. ChitinC. CelluloseD. Glycogen

In maltose, glycosidic linkage is present between the two glucose units at positions :(a) 1, 2 (b) 1, 1 (c) 1, 3 (d) 1, 4

`alpha-D` glucose and `beta-D`-glucose differ from each other due to the difference in one of the carbon atoms, with respect to its.A. Number of `OH` groupsB. ConfigurationC. ConformationD. Size of hemiacetal ring

What are gums made of? Is Fevicol different?

What are gums made of ? Is fevicol different ?

What are biomolecules?

Find out a qualitative test for proteins, fats and oils, amino acids and test any fruit juice, saliva, sweat and urine for them.

Describe the important properties of enzymes.

Find out how much cellulose is made by all the plants in the biosphere and compare it with how much of paper is manufactured by man and hence what is the consumption of plant material by man annually. What a loss of vegetation!

Describe the important properties of enzymes.

What do you understand from names (a) aldo pentose and (b) ketoheptose ?

Match the column I and Column II using the code given below the column.column Icolumn IIA. Aldo pentose1. RibuloseB. Keto pentose2. FructoseC. Aldo hexose3. RiboseD. Keto hexose4. GlucoseABCDa3142b1234c4321d2413

Match the column I and Column II using the code given below the column.column Icolumn IA. Fruit sugar1. LactoseB. Blood sugar2. FructoseC. Malt sugar3. GlucoseD. Milk sugar4. MaltoseABCDa1234b4123c3412d2341

Match the column I and Column II using the code given below the column.column Icolumn IIA. Proteins1. Induces physiological repsonseB. Lipids2. Bio catalystC. Enzymes3. Structural back boneD. Homones4. Protective coating in aquatic organismABCDa3421b1234c4312d2143

Match the column I and Column II using the code given below the column.column Icolumn IIA. Vitamin A 1. PellagraB. Vitamin B12. XerophthalmiaC. Vitamin B23. Beri BeriD. Vitamin B3B. CheilosisABCDa1234b3412c4123d2341

Match the column I and Column II using the code given below the column. column I column IIA. Vitamin B51. Hair lossB. Vitamin B62. Megaloblastic anaemiaC. Vitamin B73. Inadequate growthD. Vitamin B94. ConvulsionsABCDa3412b1234c4321d2143

Which metal is present in Vitamin B12 ? (a) Ca (II) (b) Zn (II) (c) Fe (II) (d) Co (III)

Name the Vitamins whose deficiency cause 1. rickets 2. scurvy

Match the column I and Column II using the code given below the column.column Icolumn IIA. Vitamin B121. ScurvyB. Vitamin C2. Haemorrhagic diseasesC. Vitamin D3. Pernicious anaemiaD. Vitamin K4. RickersABCDa3142b1234c4321d2413

Match the column I and Column II using the code given below the column.column Icolumn IIA. Vitamin B11. PantothenicB. Vitamin B22. NiacinC. Vitamin B​​​​​​​33. ThiaminD. Vitamin B​​​​​​​54. RiboflavinABCDa3412b1234c4312d2143

Match the column I and Column II using the code given below the column.column Icolumn IIA. Phylloquinone1. Vitamin CB. Tocopherol2. Vitamin AC. Ascorbic3. Vitamin KD. Retinol4. Vitamin EABCDa3412b1234c4321d2143

Prostaglandins areA. amino acidB. steroidC. fatty acidD. carbohydrate

Protein quality depends uponA. Essential amino acidsB. Isoelectric pointC. CoagulabilityD. Quaternary structure

Prostaglandins areA. Simple proteinsB. Conjugated proteinsC. Saturated fatty acidsD. Unsaturated fatty acids

Dinucleotide is obtained by joining two nucleotides together by phosphodiester linkage. Between which carbon atoms of pentose sugars of nucleotides are these linkages present? (i) 5′ and 3′ (ii) 1′ and 5′ (iii) 5′ and 5′ (iv) 3′ and 3′

Match the column I and Column II using the code given below the column.column Icolumn IIA. Vitamin B11. PantothenicB. Vitamin B22. NiacinC. Vitamin B33. ThiaminD. Vitamin B54. RiboflavinABCDa3412b1234c4312d2143