Lab quiz
Gram-negative cell walls have an outer membrane that contains lipids and peptidoglycan
False
Red tides are caused by red algae
False
what is the purpose of sex pili
To transmit DNA between bacteria
Refer to figure what is the structure of.6 in this life cycle
Zygote
Significant difference between Archea and bacteria is the
Absence of peptidoglycan in the cell wall of Archea
Which statement about bacteria is false
Bacteria are not cellular and are sometimes not classified as life forms
How do some bacteria response to adverse environmental conditions
Bacteria form endospores
Bacterial plasmids often have genes that code for genetic exchange or antibiotic resistance.
True
Most Protist are
aquatic
Small hair like structures made up of proteins on the surface of bacteria are
fimbriae
Which structure in the figure is labeled as C
Capsule
Among the protist group below which has organisms that typically movie with 2 or more flagella
Diplomonads
Amoebozoans move by means of flagella.
False
Refer to figure what is occurring at.1 of the cycle
Mitosis
Which type of bacterium would not be able to survive in the presence of oxygen
Obligate anaerobic
Gram-positive bacteria would stain _____ in a gram stain because of thick layer of _____ in their cell walls.
Purple peptidoglycan
What is the function of the structure labeled as B in the figure
To adhere to surfaces or other bacteria
what is the nutritional mode of most bacteria
heterotrophy
Which protists clade (supergroup) is characterized by their greatly modified mitochondria?
Excavates
Most protists are _____ with each cell forming complete organism capable of performing all the functions characteristic of life
Unicellular
Refer to the figure what is the function of the structure labels 6
Waste elimination
The most common mode of reproduction in bacteria is
Binary fission
Bacterial ____ cause systemic symptoms such as fever, whereas bacterial ____ cause more specific maladies.
Exotoxins;Endotoxins
After an endospore forms, the cell membrane of the original cell lyses, releasing and endospore.
False
Prokaryotes have a nucleus contains DNA
False
In the figure what would structure A be made up as a gram-negative bacterium?
Peptoglycan
What is a chain of round bacteria called
Streptococci
Which protists group is characterized by having a micronucleus and a micronucleus?
Ciliates
Protists consist of a single cell with multiple nuclei. This condition is known as
Coenocytic
Which is the only prokaryotes to carry on photosynthesis the generate oxygen
Cyanobacteria
In Primary endosymobiosis an ancient eukaryotic cell engulfed a _____, which survived and evolved into a chloroplast.
Cyanobacterium
Land plants are thought to have arisen most directly from a red algal ancestor.
False
Streptococci, the bacteria responsible for strep throat infections, is classified within which group of Bacteria?
Gram-negative bacteria
Refer to the figure, which protest group'life cycle is demonstrated in this figure
Green algae
Pseudopodia are used by Amoeba for ingesting food as well as for:
Locomotion
Given the diversity in protest ultrastructure and molecular data, biologists regard the protests as a ____ group.Meaning that some are descendants of a common eukaryotic ancestor.
Paraphyletic
Why is penicillin ineffective against gram negative bacteria
Penicillin cannot reach the thin peptidoglycan layer easily because it is protected by the bacteria's outer membrane
What are the small circles of DNA that exist within the bacterial cytoplasm in addition to the bacterial chromosome
Plasmids
How do bacteria move
By means of a rotating flagella
Members of the _____ are thought to have given rise to plants.
Green algae
Which eukaryotic organelles likely arose from symbiotic relationship between larger cells and bacteria?
Mitochondria and chloroplasts
Although bacteria lack membrane-bound organelles such as chloroplasts and mitochondria they can still perform the functions of these organelles by localizing certain metabolic enzymes on
The plasma membrane
Some bacteria avoid being phagocytized by a host's immune system by means of:
Their capsule or slime layer