Categorieën: Alle - macromolecules - polysaccharides - ribosomes - transcription

door Amy Trevino 7 jaren geleden

194

Biology Extra Credit

Biological macromolecules are essential for life, encompassing carbohydrates, nucleic acids, proteins, and lipids. Carbohydrates include monosaccharides like glucose, oligosaccharides, disaccharides such as lactose, and polysaccharides like starches, cellulose, and chitin.

Biology Extra Credit

Biological Macromolecules

Nucleic Acids

Nucleosides
Pentose sugar

Deoxiribose

DNA

Ribose

RNA

Transcription

Position on DNA

Upstream

Downstream

performed by DNA-dependent RNA polymerase (III)

synthesizes 5' to 3'

reads 3' to 5'

ends at Stop Codon

starts at Promoter

messengerRNA

Prokaryotes

pre-mRNA

Exons

Expressed

Introns

Spliced out

snRNPSs

Poly-A-tail

3' end

5' cap

allows translation

increases stability

modified guanine

Eukaryotes

Translation

Steps

Termination

Stop codon reached

Elongation

Movements of tRNA from A site to P site

Polypeptide chain rows

Initiation

Starts at start codon

AUG

Ribosomes

ribosomalRNA

2 subunits

Large subunit

Small subunit

mRNA binding site

3 Active Sites

A site

holds amino acid

P site

growing polypeptide

E site

exit site

transferRNA

anticodon

Amino acids at 3' end

Clover shaped

translates codons

Nitrogenous base

Pyrimidines

Thymine

Uracil

Cytosine

Purines

Guanine

Adenine

Nucleotides
Phosphate group

Lipids

Saturated
Unsaturated

cis-unsaturated

trans-unsaturated

Glycerol Based Lipids
Compound

Phospholipids

Glycolipids

Simple

Oils

Fats

Non-Glycerol Based Lipids
Waxes
Steroids

Steroids in reproductive processes

Progestagens

Androgens

Estrogen

Common Steroid Hormones

Progesterone

Testosterone

Estradiol

Carbohydrates

Polysaccharides
Cellulose
Chitin
Starches

Amylopectin

Amylose

Oligosaccharides
Disaccharides
Lactose
Monosaccharides
Glucose

Proteins

Amino Acids
Quartenary Structure

More than one amino acid chain

Tertiary Structure

3D folding because of side chain interactions

Secondary Structure

Alpha helix

Beta pleated sheet

Primary Structure

Chain of amino acids