Biomolecules Test 3

Total Questions:50 Total Time: 60 Min

Remaining:

 

Questions 1 of 50

Question:Glucose gives silver mirror with Tollen's reagent. It shows the presence of

Answers Choices:

An acidic group

An alcoholic group

A ketonic group

An aldehydic group

Questions 2 of 50

Question:A certain compound gives negative test with ninhydrin and positive test with Benedict's solution. The compound is

Answers Choices:

A protein

A monosaccharide

A lipid

An amino acid

Questions 3 of 50

Question:The commonest disaccharide has the molecular formula

Answers Choices:

\({C_{10}}{H_{18}}{O_9}\)

\({C_{10}}{H_{20}}{O_{10}}\)

\({C_{18}}{H_{22}}{O_{11}}\)

\({C_{12}}{H_{22}}{O_{11}}\)

Questions 4 of 50

Question:On complete hydrolysis of starch, we finally get

Answers Choices:

Glucose

Fructose

Glucose and fructose

Sucrose

Questions 5 of 50

Question:When sucrose is heated with conc. \(HN{O_3}\)the product is

Answers Choices:

Sucrose nitrate

Formic acid

Oxalic acid

Citric acid

Questions 6 of 50

Question:Amylopectin is

Answers Choices:

Water soluble

Water insoluble

Forms colloidal solution with water

Both and

Questions 7 of 50

Question:The reagent which forms crystalline osazone derivative when reacted with glucose, is

Answers Choices:

Fehling solution

Phenylhydrazine

Benedict solution

Hydroxylamine

Questions 8 of 50

Question:An enzyme which brings about the conversion of starch into maltose is known as

Answers Choices:

Maltase

Zymase

Invertase

Diastase

Questions 9 of 50

Question:Glucose contains

Answers Choices:

One \( - CHO\) group

Five \( - OH\) groups

One primary alcoholic group

Four secondary alcoholic groups

All are correct

Questions 10 of 50

Question:Carbohydrates are stored in human body as

Answers Choices:

Glucose

Glycogen

Starch

Fructose

Questions 11 of 50

Question:An example of a disaccharide made up of two units of the same monosaccharides is

Answers Choices:

Sucrose

Maltose

Lactose

None of these

Questions 12 of 50

Question:Which carbohydrates has highest abundance in human blood

Answers Choices:

d-fructose

d-glucose

Sucrose

Lactose

Questions 13 of 50

Question:Formation of silver mirror by glucose shows that it is a/an

Answers Choices:

Oxidising agent

Acid

Reducing agent

A salt of silver

Questions 14 of 50

Question:Which of the following statements is right Cellulose are linear polymers of \(\beta - \) glucose molecules with \(\beta - 1,\,4 - \) linkages

Answers Choices:

Starches are polymers of \(\alpha - \)

glucose molecules with \(\beta - 1,\,4 - \)

linkages and some \(\beta - 1,\,6 - \) cross-linkages

Proteins are polyamides of \(\beta - \) amino acids

Questions 15 of 50

Question:In polysaccharides the linkage connecting monosaccharide units is called

Answers Choices:

Glycoside linkage

Nucleoside linkage

Glycogen linkage

Peptide linkage

Questions 16 of 50

Question:Blood sugar is the same as

Answers Choices:

Glucose

Galactose

Glycogen

Fructose

Questions 17 of 50

Question:Glucose has functional group

Answers Choices:

Aldehydic

Aldehydic and alcoholic

Alcoholic

Ketonic and alcoholic

Questions 18 of 50

Question:Glycolysis is

Answers Choices:

Conversion of glucose to haem

Oxidation of glucose to glutamate

Conversion of pyruvate to citrate

Oxidation of glucose to pyruvate

Questions 19 of 50

Question:Which of the following is an example of ketohexose

Answers Choices:

Mannose

Galactose

Maltose

Fructose

Questions 20 of 50

Question:The safest and the most common alternative of sugar is

Answers Choices:

Glucose

Aspartame

Saccharin

Cyclodextrin

Questions 21 of 50

Question:Peptides are

Answers Choices:

Esters

Salts

Amides

Ketones

Questions 22 of 50

Question:The proteins which are insoluble in water are

Answers Choices:

Fibrous proteins

Globular proteins

Both (1) and (2)

None of these

Questions 23 of 50

Question:Irreversible precipitation of proteins is called

Answers Choices:

Denaturation

Hydrolysis

Rearrangement

Electrophoresis

Questions 24 of 50

Question:Enzymes are

Answers Choices:

Living organisms

Dead organisms

Complex nitrogenous substances produced in living cells

None of these

Questions 25 of 50

Question:Which is an essential constituent of diet

Answers Choices:

Starch

Glucose

Carbohydrate

Protein

Questions 26 of 50

Question:Proteins can be used

Answers Choices:

As food

In textile

As enzyme

All of these

Questions 27 of 50

Question:Which of the following is not a classification of proteins

Answers Choices:

Enzymes

Antibodies

Antigens

Hormones

Questions 28 of 50

Question:The protein that is a structural material is

Answers Choices:

Albumin

Oxytocin

Haemoglobin

Keratin

Questions 29 of 50

Question:For \(\alpha - \)amino acids having the structure \(R - \mathop {\mathop {CH - }\limits_{|\,\,\,\,\,\,\,\,\,} }\limits_{N{H_2}\,\,} C{O_2}H\) Which of the following statements are true (A) Water solubility is maximum at a pH when concentrations of anions and cations are equal (B) They give ninhydrin test (C) On reacting with nitrous acid give off \({N_2}\)

Answers Choices:

All

B and C

A and B

A

Questions 30 of 50

Question:Which compound can exist in a dipolar (zwitter ion) state

Answers Choices:

\({C_6}{H_5}C{H_2}CH(N = C{H_2})COOH\)

\({(C{H_3})_2}CH.CH(N{H_2})COOH\)

\({C_6}{H_5}CONHC{H_2}COOH\)

\(HOOC.C{H_2}C{H_2}COCOOH\)

Questions 31 of 50

Question:What is the monomer of polypeptide

Answers Choices:

Amino acid

Glucose

Nucleoside

Nucleotide

Questions 32 of 50

Question:Which of the following enzymes is not useful in the digestion of proteins

Answers Choices:

Chymotrypsin

Pepsin

Trypsin

Lipase

Questions 33 of 50

Question:The test used for identifying peptide linkage in proteins is

Answers Choices:

Borsche's test

Molisch's test

Ninhydrin test

Biuret test

Questions 34 of 50

Question:Which of the following is not a function of proteins

Answers Choices:

Nails formation

Skin formation

Muscle formation

Providing energy for metabolism

Questions 35 of 50

Question:Identify the incorrect statement

Answers Choices:

An octa deca peptide contains 18 amino acid residues and 17 peptide bonds

Addition of an inert gas into a system in thermodynamic equilibrium for the dissociation of \(PC{l_5}\) shifts the equilibrium to the left.

When gold dissolves in aquaregia the complex formed is chloroauric acid

In the extraction of aluminium purified bauxite is dissolved in molten fluorospar

If the pH value of a solution is to be decreased from 5 to 3, the hydrogen ion concentration must be increased twice the initial value.

Questions 36 of 50

Question:\(\alpha \)-helix is found in

Answers Choices:

DNA

RNA

Lipid

Protein

Questions 37 of 50

Question:The main structural of protein is

Answers Choices:

The ester linkage

The ether linkage

The peptide linkage

All of these

Questions 38 of 50

Question:A biological catalyst is essentially

Answers Choices:

An enzyme

A carbohydrate

An amino acid

A nitrogen compound

Questions 39 of 50

Question:Which synthesis was done by Stainley Millar

Answers Choices:

Amino acid

Protein

Virus

Vitamin

Questions 40 of 50

Question:The bond that determines the secondary structure of proteins is or secondary structure of protein is due to

Answers Choices:

Coordinate bond

Covalent bond

Hydrogen bond

Peptide bond

Questions 41 of 50

Question:Cell membrane contains

Answers Choices:

Alternate layers of phospholipid and coline

Double layers of phospholipid

Double layers of phospholipid with polar ends projected outside

Double layers of phospholipid with polar ends projected inside

Questions 42 of 50

Question:Which of the following compounds do not belong to lipids

Answers Choices:

Fats

Amino acids

Phospholipids

Carbohydrates

Questions 43 of 50

Question:Which is not a macromolecule

Answers Choices:

DNA

Starch

Palmitate

Insulin

Questions 44 of 50

Question:The base adenine occurs in

Answers Choices:

DNA only

RNA only

DNA and RNA both

Protein

Questions 45 of 50

Question:The protein which maintains blood sugar level in the human body

Answers Choices:

Haemoglobin

Oxytocin

Insulin

Ptyalin

Questions 46 of 50

Question:In DNA, the complementary bases are

Answers Choices:

Uracil and adenine; cytosine and guanine

Adenine and thymine; guanine and cytosine

Adenine and thymine; guanine and uracil

Adenine and guanine; thymine and cytosine

Questions 47 of 50

Question:The structure of DNA is

Answers Choices:

Linear

Single helix

Double helix

Triple helix

Questions 48 of 50

Question:Which do the following vitamins has isoprene units in its structure

Answers Choices:

Vitamin A

Vitamin C

Vitamin \({B_2}\)

Vitamin D

Questions 49 of 50

Question:The reason for double helical structure of DNA is operation of

Answers Choices:

Vander Waal's forces

Dipole-dipole interaction

Hydrogen bonding

Electrostatic attractions