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Biology - Six
Biology - Chapter Six
| Question | Answer |
|---|---|
| The prokaryotes are cells tha lack _____ organelles | membrane bound |
| The cell membrane of the prokaryotic lacks the steroid | cholesterol |
| The DNA molecule is attached to a place on the cell membrane of bacteria calls a | mesesome |
| Mycoplasmas, unlike other prokaryotic cells, do not have a | cell wall |
| Peptidoglycans are necessary for ___________ formation in bacteria | cell wall |
| The only cellular organelle in bacteria is the | ribosome |
| A chromosome makes an identical copy of itself in a process called | replication |
| The methanogens belong to the kingdom | Archaeobacteria |
| A group of interbreeding organisms is called a | species |
| The _________ are referred to as the "true" bacteria | Eubacteria |
| Bacteria reproduce by the method known as | binary fission |
| In newer terminology, a saprophyte is referred to as a | saprobe |
| Rod-shaped bacteria are known as | bacilli |
| Nitrobacteria are examples of _______ bacteria | nitrifying |
| Bacteria that require molecular oxygen for respiration are known as | aerobes |
| Bacteria that are indifferent oxygen are called | facultative anaerobes |
| Gram-positive bacteria absorb a ________ colored dye | purple |
| Toxins inhibit the _______ activities of cells | metabolic |
| True bacteria can survive unfavorable environmental conditions by forming | endospores |
| The ______ are evolutionary links between prokaryotic and eukaryotic cells | prochlorons |
| In some cyanobacteria known as _________ can fix atmospheric nitrogen | heterocysts |
| The habitat of most blue-greens is ___ water | fresh |
| A virus particle is known as a | virion |
| A virus that infects bacteria is called a | bacteriophage |
| Floating green plants that inhabitat surfaces of leakes and oceans are known collectively as | phytoplankton |
| Bacteria are best described as | prokaryotic cells |
| A chain of cells is known as | filament |
| The DNA of prokaryotes is structure into | a single chromosome |
| Muramic acid is isolated from the bacterial strucutre from the bacterial structure known as | cell wall |
| The function of the ribosomes is to | translate mRNA into protein |
| Prokaryotic cells contain | both DNA and RNA |
| An incorrect statment concerning bacteria is that they | lack multienzyme systems |
| Survival of the eubacteria is increased by the ability to | form endospores |
| Encapsulated bacteria resist | phagocytosis |
| Nitrifying bacteria | convert ammonia into nitrates |
| The bacteria that live as parasites in the cells of ticks and mites are | rickettsiae |
| It is true that viruses | reproduce |
| Tunicates are | marine invertebrates |
| Bacteriorhodopsin is correctly associated with the | halophiles |
| Capsomeres are subunits of | viral coats |
| Thermophiles live best | in hot springs |
| Lysozyme is a (an) | enzyme |
| Fruiting bodies are best associated with | myxobacteria |
| The organism that causes syphilis is a | spirochete |
| Rickettsiae are best classified as | bacteria |
| Plasmadesmata are | cytoplasmic bridges between cells |
| Heterocysts are most closely associated with | nitrogen fixation |
| Actinomycetes are a type of | bacterium |
| The protein coat of a virus is known as a | capsid |
| A virus | can reproduce only within living cells |
| At one time bacteria were classified as one-celled | plants |
| Archaeobacteria are ________ to the naked eye | invisible |
| The smallest living cells are | mycoplasmas |
| In addition to the circular chromosome the only other organelle found in bacteria is the | ribosome |
| A micrometer is _____________ of a millimeter | 1/1000 |
| Mycoplasmas have _________ as much DNA as the true bacteria | one half |
| _______________ bacteria do not need light energy | Chemosynthetic |
| During favorable conditins, bacteria can reproduce in | 20 minutes |
| Disease-producing bacteria may be surrounded by a polysaccharide | capsule |
| Small bumps on roods of clover plants that house bacteria are known as ____ | nodules |
| Round bacteia are called | cocci |
| Escherichia coli live normally in the human _____ | intestine |
| When oxygen is not available, facultative anearobes obtain energy by way of the ____________ | fermentation |
| Obligate anaerobes must live in an environment free of | oxygen |
| Bacterial cells ___ build their own ATP molecule | can |
| _____________ bacteria are more susceptible to the effects of antibiotics | gram-positive |
| Most species of bacteria are | helpful |
| Retting is a process in which __are used to digest the pectin in flax plants | bacteria |
| Hemp fiber is used to make | rope |
| Polyglucans are molecules of | carbohydrates |
| The enzyme nitrogense is produced under ____ conditions | anaerobic |
| The envelope surrounding the coat of a virus comes from the | host |
| Hepatitis is a _____ disease | virus |
| Viroids are _____ than viruses | smaller |
| Viroids are known to cause several _____ diseases | plant |
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rentoria
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