Answer:
A) RNA Polymerase: It is an enzyme which is required for the synthesis of RNA from DNA strand.
B) Spliceosomes (during RNA processing): These are complex molecules made up of small nuclear RNAs (snRNA) and some proteins and required for the removal of introns from pre-mRNA.
C) snRNP's: As explained earlier , these are an integral part of spliceosomes.
D) Ribosomes: These are small particles which are made up of RNA and associated proteins and help in translation.
E) tRNA: It is a kind of RNA which helps in translation.
Explanation:
A) RNA Polymerase: It uses DNA template to transcribe RNAs which are subsequently mainly used in protein synthesis (translation).
B) Spliceosomes: They are used during RNA processing. Once a pre-mRNA has been synthesized from DNA, it needs to be processed to become functional. A pre-mRNA has introns and exons, but it is only exons which are translated and introns are removed with the help of spliceosomes.
C) snRNP's: During RNA processing, these molecules help in intron removal along with around 80 types of proteins.
D) Ribosomes: These small molecules play a great role during translation. During translation they bind to two other essential molecules named as tRNA and mRNA so as to synthesize polypeptides.
E) tRNA: It brings amino acids to the complex which is involved in protein synthesis so that polypeptide can be synthesized.
