RNA

Question 1

what are the 3 main classes of RNA

Answer 1

messenger RNA(mRNA)
ribosomal RNA(rRNA)
transfer TNA(tRNA)

Question 2

what is the structure of RNA

Answer 2

usually single stranded, can contain local stretches of stem-loops (intramolecular base-pairing)

Question 3

what are the main functions of the 3 classes of RNA

Answer 3

rRNA = combines with proteins to form ribosomes where protein synthesis takes place
mRNA = carries genetic info for protein synthesis
tRNA = carries the amino acids to be incorporated into the protein

Question 4

describe the structure and function of tRNA molecules

Answer 4

they are adapters between nucleic acid code and amino acid code, is an anticodon that consists of 3 nucleotides, the specific amino acid is attached to the 3’ end(which amino acid determined by anticodon)
have a 3d folded structure, when flattened clover leaf

Question 5

what is RNA polymerase structure and function

Answer 5

it is a multi-subunit complex that makes RNA by using one DNA strand as a template to copy the nucleotide sequence into RNA