Learning activity 2

Which two eukaryotes discussed this week do not have mitochondria?

Giardia lamblia & Trichomonas vaginalis

Rhizopus can cause opportunistic mycoses, what does this mean?

It can infect a person when their immune system is weakened

How do amoeba move?

They extend pseudopods.

Why is treating malaria so difficult?

Hides inside human cells, changes form and has developed resistance to many drugs.

How are helminths specialized to live inside a host?

They have reduced/ simplified digestive and sensory systems, produce huge numbers of eggs, and possess attachment structures.

Differentiate between an intermediate and a definitive host? (intermediate)

Harbors the larval or asexual stages of a helminth or protozoan.

Differentiate between an intermediate and a definitive host? (definitive)

Harbos the adult, and the sexually mature form of a parasite.

Will a virus that infects cattle also infect humans?

Most of the time no, because viruses are usually host-specific.

The component of a virus that is/are extended from the envelope for attachment is/are the

spikes

The envelope of a virus is derived from the host’s

Cell membrane

A virus obtains its envelope during which phase

release

Which of the following cannot be used to culture viruses?

sterile media

Which of the following is true of prions?

They are a rogue form of the protein PrP

A feature that may be found in viruses but never in bacteria is

The ability to pass through filters

The cell wall of fungi is largely composed of which of the following

chitin

Fungi that can only reproduce asexually

Anamorphic

virus that can only infect prokaryotes

Bacteriophage

Hyphae without cross walls

Coenocytic hyphae

Produced by protozoa for protection in harsh conditions

Cyst

Cytopathic effects

Changes in eukaryotic cells due to viral infection

Lysogenic cycle

Phage remains latent inside host cells

Lytic cycle

Phage release kills the host cell

Plaque

Clearing in a lawn of bacteria due to viral infection

prion

Requires PRP to replicate

Term for incorporated DNA that gives the host cell new priorities

Prophage

Schizogony

Asexual reproduction in protozoa

Hyphae with cross walls

septate hyphae

Spores

Produced by fungi for reproduction

Fungi that can reproduce both sexually and asexually

Teleomorphic

Vector

Arthropods that transmit parasites

Virion

Particle containing

True or false: viruses are only known for infectious agents that are obligatory intracellular parasites

True

True or false: The dormant stage of the protozoan life cycle is known as the endospore stage.

False

True or false: Helminths are animals that infect other animals

True

True or False: Cancers caused by viruses are contagious

False

True or False: Binomial nomenclature is used to name viruses

False

True or False: Apicomplexans are parasitic protists.

True.

When we say that a human is a dead- end host for a parasite, we mean….

The infected human is unlikely to transmit the infection to another organism

Chickenpox can reemerge as which disease?

Shingles

What is the term for the transfer of genetic material between prokaryotes via viral infection?

transduction

The head of a tapeworm intestinal parasite known as the

scolex

Which of the following do not generally cause disease in humans?

algae

what is the only ciliate that causes disease in humans?

Balantidium coli

Which of the following is NOT a morphological type of virus?

polymorphic