Levels Tought:
Elementary,Middle School,High School,College,University,PHD
Teaching Since: | Apr 2017 |
Last Sign in: | 235 Weeks Ago, 2 Days Ago |
Questions Answered: | 12843 |
Tutorials Posted: | 12834 |
MBA, Ph.D in Management
Harvard university
Feb-1997 - Aug-2003
Professor
Strayer University
Jan-2007 - Present
1. How can Salmonella use a host cell’s actin to enhance it’s pathogenicity?
2. How do Listeria move from one cell to the next (neighboring) cell?
3. Eukaryotic ribosomes are
A. 80 S
B. 70 S
C. 20 S
D. none of the above
4. True/False: All Eukaryotic ribosomes are free-floating in the cytoplasm.
5. True/False: The nuclear region in a eukaryotic cell is surrounded by a nuclear envelope
6. Which organelle is attached to the nucleus?
A. Smooth ER
B. Rough ER
C. Golgi apparatus
D. Lysosome
7. What are some differences between the smooth ER and the rough ER?
8. What structures are associated with (attached to) the Rough ER?
9. Which of the following organelles is most important in providing energy to a eukaryotic cell?
A. mitochondria
B. centrosome
C. nucleus
D. Golgi apparatus
A. Inner mitochondrial membrane
B. Outer mitochondrial membrane
11. True/False: All eukaryotes contain chloroplasts.
A. Mitochondria
B. Lysosome
C. Chloroplast
D. Endoplasmic Reticulum
13. What is the Endosymbiotic theory?
14. Which organelles help to support the Endosymbiotic theory?
A. mitochondria
B. chloroplast
C. Both A and B
D. None of the above
15. Which of the following obtains energy from inorganic/organic compounds?:
A. Chemotroph
B. Photoroph
A. N
B. 2N
20. Which of the following terms best describe fungi?
A. photoautotroph, unicellular, some aerobes, some obligate anaerobes
B. chemoautotroph, multicellular, facultative anaerobes
C. chemoheterotroph, some aerobes, some facultative anaerobes
D. photoautotroph, unicellular, parasitic
22. Which of the following are associated w/ plant roots?
A. Mycorrhizae
B. Lichen
C. Endospores
D. Cysts
A. septate hyphae
B. thallus hyphae
C. coenocytic hyphae
D. dimorphic mycelia
A. Vegetative mycelium
B. Aerial mycelium
A. Sexual
B. Asexual
A. Asymmetrically
B. Symmetrically
A. Systemic
B. Subcutaneous
C. Cutaneous
D. none of the above
A. Fungi
B. Protozoa
C. Algae
D. Bacteria
A. Cryptococcus neoformans
B. Cryptococcus gattii
A. Skin
B. Lungs
C. Gastrointestinal tract
D. Nervous system
A. Fungi
B. Protozoa
C. Algae
D. Bacteria
A. systemic mycoses
B. cutaneous mycoses
C. subcutaneous mycoses
D. none of the above
A. the drugs inhibit synthesis of peptidoglycan
B. the drugs inhibit ergosterol synthesis
C. the drugs inhibit protein synthesis
D. they are not effective as an antifungal treatment
A. Fungi may cause disease when growing in or on the human body
B. Some fungi produce toxins that can kill humans.
C. Fungal spores may cause allergic responses in humans
D. Systemic mycoses are common in otherwise healthy adults.
A. unicellular prokaryotes
B. unicellular eukaryotes
C. multicellular prokaryotes
D. multicellular eukaryotes
A. cyst
B. endospore
C. trophozoite
D. schizogony
A. Staphylococcus aureus
B. Giardia lamblia
C. Trichomonas vaginalis
D. Plasmodium vivax
A. Giardia lamblia
B. Cryptosporidiosis
C. Entamoeba histolytica
D. All of the above
A. Giardiasis
B. Trichomoniasis
C. Malaria
D. Histoplasmosis
A. Giardiasis
B. Malaria
C. Candidiasis
D. none of the above
A. All algae are unicellular
B. Algae contain pigment molecules
C. Most algae are aquatic
D. Most algae have cellulose in their cell walls
A. Photoautotrophs
B. Photoheterotrophs
C. Chemoautotrophs
D. Chemoheterotrophs
A. Fungi
B. Algae
A. Dinoflagellates
B. Diatoms
C. Green algae
D. Red algae
A. Diatoms
B. Dinoflagellates
C. Water molds
D. Amoeba
A. Dinoflagellates
B. Giardia lamblia
C. Proteobacteria
D. Diatoms
Critical Thinking:
1. Why do algae have a greater variety of photosynthetic pigments than land plants?
2. A 63-year-old international telecommunications executive visits your office with complaints of a high fever. The fever is not constant, but intermittent. When you press him for details he estimates that every three days or so he suffers these debilitating “sweats”. He usually has headaches and muscle aches during the episodes. They keep him home from work. After half a day or so, he feels better. He reports that he has experienced these episodes for about two months.
What is the name of the condition you suspect? What is the causative organism? Is this pathogen eukaryotic or prokaryotic? What should be your first question about the patient’s history?
What are the two main places in the human body that are exploited by the causative organism in this disease? Can this individual transmit this infection to others? Why or why not? How should this patient be treated (general treatment procedures/explain)?
3. The Alaska Department of Public Health was notified that foodborne illness had occurred in fishermen aboard a fishing boat off the Alaska peninsula. The fishermen had eaten steamed clams and mussels, boiled rice, boiled potatoes, and green salad. No alcohol was consumed. Symptoms experienced by the fishermen included numbness of the lips, tingling of the extremities, uncoordinated movements, incoherent speech, and nausea. Identify the etiologic (causative) agent of this outbreak of food poisoning. How did the food get contaminated, and what item was contaminated? What is the treatment, if any? How could this illness have been prevented?
4. A crew of five workers began a partial demolition of an abandoned city hall building in a Kentucky community. Three weeks later, all five required treatment for acute respiratory illness, and three were hospitalized. Cells obtained from the patients by lung biopsy revealed oval bodies. When the construction site was inspected, epidemiologists found an accumulation of bat droppings, and neighbors said they had seen bats in the area in recent weeks. What disease is this? What is the causative agent (pathogen)? What, specifically, was seen in the lung biopsy? Is this a very virulent (dangerous) pathogen? What is the treatment?
5. One summer, a group of tourists became ill after they all stayed at the same hotel in Greece. Epidemiologists conducted surveys among all the people who had stayed at that hotel during the two-and-a-half-week period in which people were reporting their illnesses. They did this in an attempt to determine the cause of the symptoms, which were primarily diarrhea and nausea. They surveyed 239 people; 224 of them reported having been ill while they were still on vacation or shortly after their return. Their diarrheal symptoms lasted 10-15 days. Seventy of the 224 people who reported illness were classified as having definite cases of gastrointestinal disease. A case was called “definite” when a pathogen could actually be recovered from their stool. Of these, the vast majority tested positive for one particular microorganism. Microscopic analysis of the stool samples revealed the presence of small oval-shaped structures, with defined outer walls and two to four nuclei inside. What is your diagnosis (what is the disease)? What is the pathogen? What specific structures were seen in the stool? Epidemiologist interviewed the patients about their vacation activities and food intake to try to identify the environmental source of the infection. Only two types of food available in the dining room seemed to be associated with the illness: raw vegetables and salads. There was also a statistically significant relationship between illness and having consumed orange juice made from a mix (with hotel water). So what was the likely source? What is the treatment for this disease?
6. A 23 year-old sexually active female was diagnosed w/ Trichomoniasis. What is the causative agent? Her partner does not have any symptoms. Should he be tested? Both individuals were invited to a pool party later that day- should they avoid swimming in the pool and using the hot tub? Why is it significant that Trichomonas does not have a cyst stage? What is the treatment?
7. In general, what type of infection (in humans) is easier to treat? Bacterial infection? Viral infection? Eukaryotic infection? Why?
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