classifying organisms - prokaryotes Flashcards
prokaryotes means
they don’t have a proper nucleus
the genetic material inside a prokaryote is
in the cytoplasm in the form of a single circular chromosome
some bacteria p… others are d….
photosynthesise others are decomposers
(bacteria) _____________ breaks down milk sugars and is used in ______ production
lactobacillus is used in yoghurt production
(bacteria) pneumococcus is pathogenic and one of the causes of
pneumonia
bacteria are s___ and s_____
small and single-celled organisms
bacterial cells have a
cell membrane
controls what enters and leaves the cell
bacterial cell wall is made of
peptidoglycan
which maintains shape and protects the cell
bacterial cells have a cytoplasm that
contains the circular chromosome where chemical reactions occur
many bacteria also have a _____ capsule
slime
outside the cell wall providing more protection
many bacteria also have pl______
plasmids
(small circled of DNA containing extra genes)
many bacteria also have a fl_______
flagellum
which allows the bacteria to move
pathogens are microorganisms that
cause infectious disease
pathogens harm the host by
releasing toxins damaging cells
all viruses are
pathogens
b_______ f____ and p__________ can also be pathogens
bacteria, fungi and protoctista
viruses are a … surrounded by
strand of genetic material
surrounded by a protein coat
viruses are NOT
cells and not alive
to reproduce viruses,
enter a host cell
take over ribosomes and enzymes
make new virus particles
the cell dies
the viruses are released to infect new cells
viruses can affect
ALL other organisms
(tobacco mosaic virus in leaves)
(influenza infects humans - cough&temp)
decomposers (fungi&SOMEbacteria) feed by s… nutrition
saprotrophic nutrition
how does saprotrophic nutrition work
they secrete digestive enzymes out their cells onto the
dead organism,
the dead organism is broken down into small soluble molecules
that are then absorbed by the decomposer
