Types of RNA

What percentage of your dry weight is composed of protein?

70%

Functions of proteins

-Structure

-Cell-cell recognition

-Enzymes

-Movement

-Transport

-Defense

-Cell-cell attachment

-Hormones

-Hormone-binding sites

Draw a generalized amino acid

What are the three types of RNA?

mRNA, rRNA, and tRNA

mRNA

-messenger RNA

-carries the recipe for making proteins from the DNA in the nucleus to the ribosome in the cytoplasm

-made up of codons: each codon comprised of 3 nucleotides (=1 amino acid)

rRNA

-ribosomal RNA

-makes the two subunits of the ribosome: site of protein synthesis made with RNA and protein

Label the part of the ribosome: A

mRNA binding site

Label the part of the ribosome: B

P site

Label the part of the ribosome: C

A site

Label the part of the ribosome: D

Large subunit

Label the part of the ribosome: E

Small subunit

tRNA

-transfer RNA

-carries the complimentary amino acid to the ribosome to get assembled into a protein

-has an anticodon: complimentary bases to the codon

What is used to bind amino acids to tRNA?

tRNA activating enzymes

What is the purpose of the anticodon?

allows tRNA to temporarily attach to mRNA

Draw and label a tRNA