chapter 24 review

Chapter 24 review - Lecture 10 Chapter 24 Prokaryotes Viruses A Prokaryotic Cell archea bacteria have a plasma membrane generally live in a

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
A. Prokaryotic Cell archea have a plasma membrane generally live in a hypotonic environment Cell wall made of peptidoglycan – amino sugars linked by polypeptides No organelles (no chloroplasts, mitochondria, Golgi, E.R.) Circular/ Naked DNA no protein coat – no histones located in nucleoid region bacterial chromosome Plasmid DNA that encodes for catabolic enzymes resistant to antibiotics Ribosomes protein synthesis; free in cytoplasm Storage vacuoles store lipids, phosphate compounds, carbohydrates, glycogen Shape spherical: coccus (1), diplococcus (2), streptococcus (long chain), staphylococcus (irregular) rod: bacillus spiral: spirillum (rigid), spirochete (flexible) comma shaped: vibrio Cell Wall Structure Gram positive
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
have a thick layer of peptidoglycan molecules held together by amino acids Gram negative – bacteria that do not retain the stain when rinsed with alcohol have a thin layer of peptidoglycan covered by an outer membrane cell wall is made up of thin peptidoglycan layer and outer membrane, which has Antibiotics such as penicillin interfere with peptidoglycan synthesis Gram (+) cells inhibited more; Gram (–) cells more resistant Capsule slime layer that surrounds the cell wall may provide the cell with added protection against phagocytosis tend to be resistant to white blood cells Pili protein structure that helps bacteria adhere to one another or attach to certain surfaces Flagella helps prokaryotes move Motor/ basal body anchors flagellum into the cell wall by discshaped plates bacterium uses energy from ATP to pump protons out of cell diffusion of these protons back into the cell powers the motor Hook connects basal body to filament Filament extends into the outside environment Reproduction Prokaryotes
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/18/2012 for the course BIO 101 taught by Professor Martin during the Fall '08 term at Rutgers.

Page1 / 8

Chapter 24 review - Lecture 10 Chapter 24 Prokaryotes Viruses A Prokaryotic Cell archea bacteria have a plasma membrane generally live in a

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online