Chapter 19

lodine test is shown by : (a) glucose (b) starch (c) glycogen (d) polypeptide

Glucose comes under the class: (a) ketohexose (b) aldohexose (c) disaccharide (d) polysaccharide

\(\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6} \longrightarrow 2 \mathrm{C}_{2} \mathrm{H}_{3} \mathrm{OH}+2 \mathrm{CO}_{2}\) The above conversion is only possible by: (a) maltase (b) zymase (c) diastase (d) invertase

Glucose cannot be classified as: (a) aldose (b) carbohydrate (c) hexose (d) oligosaccharide

A biological catalyst is essentially : [BHU 2004] (a) an enzyme (b) a carbohydrate (c) an amino acid (d) a nitrogen compound

When glucose reacts with bromine water, the main product is: [BHU 2004] (a) acetic acid (b) saccharic acid (c) glyceraldehyde (d) gluconic acid

The vitamin most closely associated with carbohydrate metabolism is: |AMU 1995] (a) vitamin \(\mathrm{B}_{1}\) (b) vitamin \(\mathrm{B}_{2}\) (c) vitamin \(\mathrm{D}_{2}\) (d) vitamin \(B_{12}\)

Eye disease is caused by the deficiency of vitamin: (a) \(\mathrm{A}\) (b) \(\underline{B}\) (c) \(\mathrm{E}\) (d) \(\mathrm{K}\)

If one strand of DNA has the sequence ATGCTTGA, the sequence in the complementary strand would be: (a) TACGTAGT (b) TACGAACT (c) TCCGAACT (d) TACGTACT

Which of the following is oligosaccharide? (a) Maltose (b) Sucrose (c) Both (a) and (b) (d) None of these

Enzymes are essential as bio-catalysis. They function well in: [AMU 1997] (a) organic medium (solvent) (b) aqueous medium in extreme pH conditions (c) aqueous medium temperature \(=30-35^{\circ} \mathrm{C}: \mathrm{pH}=7\) (d) none of the above

Amino acids, which build up proteins, have both the carboxylic and amino groups. These amino acids are: (a) \(\alpha\)-amino acids (b) \beta-amino acids (c) \(\gamma\)-amino acids (d) position of amino and carboxylic are unspecified

Anti-haemorrhagic factor is: (a) vitamin \(\mathbb{K}\) (b) vitamin \(\mathrm{D}_{2}\) (c) vitamin \(\mathrm{A}_{2}\) (d) vitamin \(B_{12}\)

The main structural feature of proteins is: (a) the ester linkage (b) the ether linkage (c) the peptide linkage (d) all of these

Ascorbic acid is a: (a) enzyme (b) vitamin (c) protein (d) none of these

In fermentation by zymase, alcohol and \(\mathrm{CO}_{2}\) are obtained from : (a) invert sugar (b) glucose [AMU 2004| (c) fructose (d) all of these

When glucose reacts with bromine water the main product is : [HR (PMT) 1997] (a) gluconic acid (b) glyceraldehyde (c) sorbitol (d) saccharic acid

Genes are mainly composed of \(:\) (a) proteins (b) nucleic acid (c) DNA (d) \(\mathbb{R N A}\)

The structure of DNA is: (a) double helix (b) triple helix (c) single helix (d) linear

A nucleotide consists of : (a) phosphoric acid (b) nitrogen containing base (c) carbon sugar. (d) all of these

Which destroy antigens? \(\quad\) [Manipal 2000] (a) Insulin (b) Antibodies (c) Chromoprotein (d) Phosphoprotein

The reaction of fat and sodium hydroxide is known as : |Manipal 2000] (a) dehydration (b) hydrogenation (c) saponification (d) esterification

'The carbohydrate which is an essential constituent of plant cell is : |Manipal 2001] (a) sucrose (b) starch (c) cellulose (d) vitamin

Which is not present in chlorophyll? (a) Carbon (b) Calcium (c) Magnesium (d) Hydrogen

The pairs of bases in DNA are held together by : IManipal 2003] (a) ionic bonds (b) hydrogen bond (c) phosphate group (d) deoxyribose group

The basic unit not present in DNA is : (a) uracil (b) adenine (c) cytosine (d) guanine

\begin{tabular}{|l|l|l|} \hline Manipal 2004| \end{tabular} \(\begin{aligned}&\text { Hexoses and pentoses are : } \\\&\qquad \begin{array}{ll}\text { Hexides }\end{array} & \text { (b) Monosaccharidees }\end{aligned}\) (a) disaccharides (d) Oliogsaccharides (c) Polysaccharides

Which of the following test is not used for testing of proteins? [Manipal 2004] (a) Millon's test (b) Molisch's test (c) Biuret test (d) Ninhydrin test

DNA multiplication is called: (a) translation (b) transduction (c) transcription (d) replication

Which of the following is the main source of carbohydrates? IP (PMT) 19951 (a) Glucose (b) Lactose (c) Green plant (d) Fructose

Which of the following protein destroy the antigen when it enters in [P (PMT) 1995] body cell? (b) Antibodies (a) Insulin (d) Chromoprotein (c) Phosphoprotein

In DNA, the complementary bases are: (a) uracil and adenine, cytosine and guanine (b) adenine and thymine, guanine and cytosine (c) adenine and thymine; guanine and uracil (d) adenine and guanine; thymine and cytosine

Haemoglobin contains \(0.344 \%\) of iron by weight. If the molecular weight of haemoglobin is approximately 67200 , then the number of iron atoms (at. wt. of Fe is 56) present in one molecule of [P (PMT) 1996] haemoglobin are: (b) 1 (a) 4 (c) 6 (d)' 2

The charring of sugar, when treated with conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\) is due to: [P (PMT) 1996] (a) dehydration (b) oxidation (c) reduction (d) hydrolysis

Beri-beri is caused due to deficiency of : (a) vitamin \(\mathrm{B}_{1}\) (b) vitamin \(\mathrm{B}_{2}\) (c) vitamin \(\mathrm{B}_{6}\) (d) vitamin \(\mathrm{B}_{12}\)

A diet consisting of mainly rice is an adequate diet because it mainly consists of: [P (PMT) 1997] (a) carbohydrates (b) proteins (c) fats (d) vitamins

Raffinose is: IP (PMT) 2001] (a) trisaccharide (b) monosaccharide (c) disaccharide (d) none of these

Which one of the following is not present in RNA? [P (PMT) 2003] (a) Thymine (b) Uracil (c) Adenine (d) Cytosine

DNA is a polymer of : (a) nucleosides (b) nucleotides (c) purine and pyrimidine bases (d) all of the above

Glucose has functional group: [MHCET 2000] (a) aldehydic (b) aldehydic and alcoholic (c) alcoholic (d) ketonic and alcoholic

Which of the following is a disaccharide? (a) Glucose (b) Ribulose (c) Lactose (d) Arabinose

Which of the following contains nitrogen? (a) Proteins (b) Fats (c) Oils (d) Carbohydrates

Fat is an ester of: [MHCET 2002] (a) monohydroxy alcohol and saturated carboxylic acid (b) monohydroxy alcohol and aliphatic unsaturated carboxylic acid (c) trihydroxy aliphatic alcohol and saturated carboxylic acid (d) dihydroxy aliphatic earboxylie acid

To detect the reducing and non reducing sugars, which of the following test is used? (a) Molisch test (b) Biuret test (c) Fehling's test (d) Millions test

Fats, on alkaline hydrolysis, gives: (a) oils (b) soaps (c) detergents (d) glycol + acid

Amino acids are produced by the hydrolysis of: (a) carbohydrates (b) fats (c) nucleic acids (d) proteins

Toilet soap is mixture of : (a) sodium salts of higher fatty acids (b) potassium palmitate and sodium stearate (c) sodium and calcium salts of higher fatty acids (d) potassium salts of higher fatty acids

The sequence in the structure of nucleic acid is : (a) base \(+\) phosphate \(+\) pentose (b) phosphate group \(+\) pentose \(+\) base (c) pentose \(+\) base \(+\) phosphate group (d) all of the above

Molisch test is answered by : [KCET 1997] (a) sucrose (b) all carbohydrates (c) glucose (d) fructose

The purine base present in RNA is : (a) thymine (b) guanine (c) uracil (d) cytosine