Biomolecules MCQs

Q. Name the simplest amino acid Alanine Tyrosine Asparagine Glycine Answer: Glycine

Q. Choose the best option proteins has catalytic activity Proteins and RNA have catalytic activity Proteins, RNA and antibodies have catalytic activity Proteins, RNA, antibodies and phospholipids have catalytic activity Answer: Proteins, RNA and antibodies have catalytic activity

Functions of nucleotide includes

To identify self DNA from non-self DNA, the self DNA may be

Q. The pentoses in nucleotides are in β-furanose form in α-furanose form Both none of the above Answer: in β-furanose form

Q. N-linked oligosaccharides are linked to protein via NH2 groups of Asparagine. The sequence containing asparagine is usually asp-X-ser/thr. X can be any amino acid except glycine histidine proline serine Answer: proline

Q. O- linked oligosaccharides are attached to the protein via OH group of serine or tyrosine OH group of serine or threonine OH group of tyrosine or threonine OH group of threonine only Answer: OH group of serine or threonine

Q. Glycosylation takes place in SER and golgi RER and golgi SER, RER and golgi RER, golgi and mitochondria Answer: RER and golgi

Q. Lectins binds preferentially to more polar region of the carbohydrate residue less polar region of the carbohydrate residue both polar and non-polar region of the carbohydrate residue All of the above Answer: more polar region of the carbohydrate residue

Q. Selectins are Plasma membrane lectins involved in cell-cell recognition cytosolic lectins involved in intracellular signalling Plasma membrane glycoproteins involved in cell to cell interaction Plasma membrane glycoproteins that functions as second messengers Answer: Plasma membrane lectins involved in cell-cell recognition