Biomolecules Test 4

Total Questions:50 Total Time: 60 Min

Remaining:

 

Questions 1 of 50

Question:An organic compound answers Molisch's test as well as Benedict's test. But it does not answer Scliwanoff's test. Most probably, it is

Answers Choices:

Sucrose

Protein

Fructose

Maltose

Questions 2 of 50

Question:Glucose when heated with \(C{H_3}OH\) in presence of dry HCl gas gives \(\alpha \) and \(\beta - {\rm{methyl}}\) glucosides because it contains

Answers Choices:

An aldehyde group

A \( - C{H_2}OH\) group

A ring structure

Five hydroxyl groups

Questions 3 of 50

Question:Which one is a disaccharide

Answers Choices:

Glucose

Fructose

Xylose

Sucrose

Questions 4 of 50

Question:Which is monosaccharide

Answers Choices:

Glucose

Fructose

Galactose

All of these

Questions 5 of 50

Question:Which is polysaccharide

Answers Choices:

Starch

Cellulose

Glycogen

All of these

Questions 6 of 50

Question:The calorific values of fats, carbohydrates and proteins vary in the order

Answers Choices:

Fats > Carbohydrates > Proteins

Fats > Proteins > Carbohydrates

Carbohydrates > Proteins > Fats

Proteins > Carbohydrates > Fats

Questions 7 of 50

Question:Which of the following statements about ribose is incorrect

Answers Choices:

It is a polyhydroxy compound

It is an aldehyde sugar

It has six carbon atoms

It exhibits optical activity

Questions 8 of 50

Question:Maltose contains how many oxygen atoms

Answers Choices:

6

10

11

22

Questions 9 of 50

Question:The correct name of ‘sucrose' is

Answers Choices:

\(\alpha - D - {\rm{glucopyranosyl}} - \beta - D - {\rm{fructofuranoside}}\)

\(\beta - D - {\rm{glucopyranosyl}} - \beta - D - {\rm{fructofuranoside}}\)

\(\alpha - D - {\rm{glucopyranosyl}} - \alpha - D - {\rm{fructofuranoside}}\)

\(\beta - D - {\rm{glucopyranosyl}} - \alpha - L - {\rm{fructofuranoside}}\)

Questions 10 of 50

Question:Canesugar on hydrolysis gives

Answers Choices:

Glucose and maltose

Glucose and lactose

Glucose and fructose

Only glucose

Questions 11 of 50

Question:Glucose is a

Answers Choices:

Monosaccharide

Disaccharide

Trisaccharide

Polysaccharide

Questions 12 of 50

Question:Which carbohydrate is used in silvering of mirrors

Answers Choices:

Sucrose

Starch

Glucose

Fructose

Questions 13 of 50

Question:The sugar present in fruits is

Answers Choices:

Fructose

Glucose

Sucrose

Galactose

Questions 14 of 50

Question:Carbohydrates are

Answers Choices:

Hydrates of carbon

Polyhydroxy aldehydes or ketones

Polyhydroxy acid compounds

None of these

Questions 15 of 50

Question:Glucose and fructose are

Answers Choices:

Isotopes

Isotones

Isomers

Homologues of each other

Questions 16 of 50

Question:The structural information about their biosynthesis is contained in a class of compounds called nucleic acids, e.g. RNA and DNA . The number of atoms in the cyclic structure of D-fructose is

Answers Choices:

5

6

4

7

Questions 17 of 50

Question:Which is used in motion picture films

Answers Choices:

Cellulose acetate

Glucose acetate

Starch acetate

Sucrose acetate

Questions 18 of 50

Question:Glucose reacts with acetic anhydride to form

Answers Choices:

Mono-acetate

Tetra-acetate

Penta-acetate

Hexa-acetate

Questions 19 of 50

Question:Which of the following is an aldohexose

Answers Choices:

Cellulose

Sucrose

Glucose

Raffinose

Questions 20 of 50

Question:The calorific value is maximum in case of

Answers Choices:

Milk

Proteins

Minerals

Carbohydrates

Questions 21 of 50

Question:An invert sugar is

Answers Choices:

Isorotatory

Dextrorotatory

Laevorotatory

Optically inactive

Questions 22 of 50

Question:The specific rotation of equilibrium mixture of a-D-glucose and b-D-glucose, is

Answers Choices:

\( + {19^o}\)

\( + {112^o}\)

\( + {52^o}\)

\( + {100^o}\)

Questions 23 of 50

Question:The charring of sugar, when treated with conc. \({H_2}S{O_4},\) is due to

Answers Choices:

Oxidation

Reduction

Dehydration

Hydrolysis

Questions 24 of 50

Question:Which among the following is the simplest sugar

Answers Choices:

Glucose

Cellulose

Starch

Glycogen

Questions 25 of 50

Question:The proteins with a prosthetic group are called

Answers Choices:

Pseudo proteins

Complex proteins

Conjugated proteins

Polypeptides

Questions 26 of 50

Question:The prosthetic group of haemoglobin is

Answers Choices:

Porphin

Haem

Globin

Globulin

Questions 27 of 50

Question:When collagen is boiled with water, it forms

Answers Choices:

Precipitate

Solution

Gelatin

Complex collagen

Questions 28 of 50

Question:Which of the following foodstuffs contains nitrogen

Answers Choices:

Carbohydrates

Fats

Proteins

None of these

Questions 29 of 50

Question:pH in stomach is approximately

Answers Choices:

7

2

6.5

10

Questions 30 of 50

Question:Which of the following reacts with haemoglobin in the blood to form carboxyhaemoglobin

Answers Choices:

CO

\(C{O_2}\)

HCOOH

\({H_2}C{O_3}\)

Questions 31 of 50

Question:Secondary structure of a protein refers to

Answers Choices:

Mainly denatured proteins and structures of prosthetic groups

Three dimensional structure, specially the bond between amino acid residues that are distant from each other in the polypeptide chain

Linear sequence of amino acid residues in the polypeptide chain

Regular folding patterns of continuous portions of the polypeptide chain

Questions 32 of 50

Question:Haemoglobin is

Answers Choices:

An enzyme

A globular protein

A vitamin

A carbohydrate

Questions 33 of 50

Question:Albumin proteins are most abundant in

Answers Choices:

Meat

Milk

Egg

Soyabean

Questions 34 of 50

Question:The helical structure of proteins is stabilized by

Answers Choices:

Peptide bonds

Dipeptide bond

Hydrogen bond

Vander Waal's forces

Questions 35 of 50

Question:The optically inactive amino acid is

Answers Choices:

Lysine

Glycine

Arginine

Alanine

Questions 36 of 50

Question:Among the following, the achiral amino acid is

Answers Choices:

2-Ethylalanine

2-Methylglycine

2-Hydroxymethyl serine

Tryptophan

Questions 37 of 50

Question:Which of the following could act as a propellant or rockets

Answers Choices:

Liquid hydrogen + liquid nitrogen

Liquid oxygen + liquid argon

Liquid hydrogen + liquid oxygen

Liquid nitrogen +liquid oxygen

Questions 38 of 50

Question:Tripalmitin is

Answers Choices:

A protein

An enzyme

A lipid

A carbohydrate

Questions 39 of 50

Question:On hydrolysis, all lipids yield

Answers Choices:

Monocarboxylic acids

Monohydric alcohols

Monohaloalkanes

Enzymes

Questions 40 of 50

Question:A distinctive and characteristic functional group of fats is

Answers Choices:

An ester group

A peptide group

A ketonic group

An alcoholic group

Questions 41 of 50

Question:The waxes are long chain compounds of fatty acids, which belong to the class of

Answers Choices:

Esters

Ethers

Alcohols

Acetic acid

Questions 42 of 50

Question:Which of the following statements about the assembly of nucleotides in a molecule of deoxyribose nucleic acid (DNA) is correct

Answers Choices:

A pentose of one unit connects to a pentose of another

A pentose of one unit connects to the base of another

A phosphate of one unit connects to a pentose of another

A phosphate of one unit connects to the base of another

Questions 43 of 50

Question:Vitamin A is present in

Answers Choices:

Cod liver oil

Carrot

Milk

In all of these

Questions 44 of 50

Question:Ascorbic acid is a

Answers Choices:

Vitamin

Enzyme

Protein

Carbohydrate

Questions 45 of 50

Question:Vitamin \({B_1}\) is

Answers Choices:

Riboflavin

Cobalamin

Thiamine

Pyridoxine

Questions 46 of 50

Question:A gene is a segment of a molecule of

Answers Choices:

DNA

m-RNA

t-RNA

Protein

Questions 47 of 50

Question:The deficiency of vitamin-C causes

Answers Choices:

Scurvy

Rickets

Pyrrohea

Pernicious Anaemia

Questions 48 of 50

Question:The tripeptide harmone present in most living cells is...

Answers Choices:

Glutathione

Glutamine

Oxytocin

Ptyalin

Questions 49 of 50

Question:The function of DNA in an organism is

Answers Choices:

To assist in the synthesis of RNA molecule

To store information of heredity characteristics

To assist in the synthesis of proteins and polypeptides

All of these

Questions 50 of 50

Question:The harmone that helps in the conversion of glucose to glycogen in

Answers Choices:

Adrenaline

Insulin

Cortisone

Bile acids