221.

DNA is specific because it has

• number of nucleotides

• specific nature of phosphate and sugar

• arrangement of protein in DNA

• specific nature of purine and pyrimidines

Role of carbohydrate in protoplasm

• as catalyst

• for energy

• as enzymes

• for synthesis

The RNA found in eukaryotic ribosomes are

• 5 S and 16 S RNA

• 5 S, 16 S, 18 S RNA

• 23S, 16 S, RNA

• 5 S and 28 S RNA

Which one of the following codons codes for the some information as UGC?

• UGU

• UGA

• UAG

• UGG

During translation initiation in prokaryotes, a GTP molecule is needed in

• association of 30S, mRNA with formyl-met-tRNA

• association of 50S subunit of ribosome with initiation complex

• formation of formyl-met-tRNA

• binding of 30S subunit of ribosome with mRNA

In the genetic code dictionary, how many codons are used to code for all the 20 essential amino acids?

• 61

• 60

• 20

• 64

Ribosomal RNA (rRNA) is synthesized in

• nucleolus

• nucleosome

• cytoplasm

• ribosome

The number of RNA molecules in 60S sub- particles of 80S ribosomes are

• five 

• four

• three

• two

Stop codons are

• AUG, GUG

• UAA, UGA, UAG

• UAC, UGG

• AGU, AGA, UAC

DNA multiplication is called

• translation

• replication

• transduction

• transcription