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