White precipitate is formed in

• Millon's test

• ninhydrin test

• biuret test

• xanthoprotic test

The compound, which give a positive ninhydrin test and a negative Benedict's solution test, is

• a monosaccharide

• a disaccharide

• a lipid

• a protein

Which of the following can absorb over 90% of its own mass of water and also does not stick to wounds?

• Saran

• Thiokol

• Rayon

• Gun cotton

The prosthetic group of haemoglobin is

• porphin

• globulin

• haem

• gelatin

Which of the following is a trisaccharide ?

• Stachyrose

• Sucrose

• Raffinose

• Ribose

Glucose on reaction with Br₂ water gives

• glucaric acid

• gluconic acid

• saccharic acid

• citric acid

During conversion of glucose into glucose cyanohydrin, which functional group/atom of glucose is replaced?

• Hydrogen

• Aldehydic group

• Primary alcoholic group

• Secondary alcoholic, group

Which of the following proteins is globular?

• Collagen

• Albumin

• Myosin

• Fibroin

What type of sugar molecule is present in DNA?

• D-3-deoxyribose

• D-ribose

• D-2-deoxyribose

• D-glucopyranose

The amino acid, which is basic in nature is

• histidine

• tyrosine

• proline

• valine