Microbiology Chapter 4

Which organelle is found in algae but not found in protozoa or fungi?

Chloroplasts

In eukaryotic cells, ribosomes have two locations: scattered in the ________ and on the surface of the _________.

Cytoplasm and endoplasmic reticulum

Larval development of helminths occurs in which host?

Intermediate (secondary) host

The first primitive eukaryotic cells likely evolved from _____.

Last common ancestor

Which of the following is not true of the cytoskeleton?

Made up of cilia

Which organelle contains cristae where enzymes and electron carriers for aerobic respiration are found?

Mitochondria

Which of the following is found in eukaryotic cells but not in the cells of bacteria?

Nucleus Mitochondria Endoplasmic reticulum Lysosomes

After returning from a trip to Africa, Tom begins to feel very tired and weak. He has severe anemia. A blood smear reveals a protozoan is present in his blood. The health care provider tells Tom he has malaria. Which of the following could be the causative agent of his disease?

Plasmodium falciparum Correct

Cell walls are not usually found in _____.

Protozoa

Which of the following is not classified as a helminth?

Tapeworm Fluke Flatworm Roundworm All of the choices are helminths.

Which of the following lines of evidence suggest that mitochondria evolved from the endosymbiosis of a pre-eukaryotic cell with a prokaryote?

They contain circular molecules of DNA They contain 70S ribosomes They divide independently from the cell

A saprobe differs from a parasite in that ________.

a saprobe acquires its nutrients from the remains of dead animals or plants whereas a parasite acquires its nutrients from living tissue

During unfavorable growth conditions, many protozoa can convert to a resistant, dormant stage called a(n) _____.

cyst

Fungi that grow as yeast at one temperature but will grow as mold at another temperature are called _____.

dimorphic

Fungal spores differ from bacterial endospores in that ________.

fungal spores are reproductive, whereas bacterial endospores are for survival

Larvae and eggs are developmental forms of _____.

helminths

A(n) _______ originates from the Golgi apparatus as one type of vesicle that contains a variety of enzymes for intracellular digestion.

lysosome

The woven, intertwining mass of hyphae that makes up the body of a mold is a _____.

mycelium

The site for ribosomal RNA synthesis is the _____.

nucleolus

Which is not a characteristic of fungi?

photosynthetic

The group of protozoa that use pseudopodia to move are the _____.

sarcodina

The eukaryote cell membrane is composed of _____.

sterols proteins phospholipids cholesterol

Eukaryotic flagella differ from prokaryotic flagella in that ________.

they are thicker, they are covered by membrane and they contain microtubules

Protists with contractile vacuoles ________.

use them to expel excess water from the cell