Protein present in silk fibre is

• caesin

• keratin

• elastin

• fibroin

Which of the following vitamins is water soluble as well as an antioxidant?

• Vitamin- B₁

• Vitamin-A

• Vitamin-D

• Vitamin-C

Which one is component of Ornithine cycle?

• Ornithine, citrulline and alanine

• Ornithine, citrulline and arginine

• Amino acids are not used

• Ornithine, citrulline and fumaric acid

Which compound has a very important role in prebiotic evolution?

• Sulphur dioxide

• Nitric oxide

• Methane

• Sulphur trioxide

Which one is component of Ornithine cycle?

• Ornithine, citrulline and alanine

• Ornithine, citrulline and arginine

• Amino acid are not used

• Ornithine, citrulline and fumaric acid

Paraffin wax is

• ester

• acid

• monohydric alcohol

• cholesterol

Which vitamin should not be stored?

• Calciferol

• Retinol

• Niacin

• Ascorbic acid

Which one is the sweetest suagr?

• Glucose

• Fructose

• Sucrose

• Maltose

Nucleotide are building blocks of nucleic acids, nucleotide is a composite molecule formed by

• (base-sugar-phosphate)n

• base-sugar-OH

• base-sugar-phosphate

• sugar-phosphate

Which of the following is the simplest amino acid?

• Tyrosine

• Asparagine

• Glycine

• Alanine