Chp 1 online practice questions

stepd of scientific method:

1) make an observation about something and aska question 2) develop an explanation and then devise an experiment to test this explanation 3) collect data from this experiment 4) draw a conclusion

T/F: Eukaryotic microbes are generally larger than prokaryotic microbes

T

T/F: Vaccination have helped reduce the spread of mumps, measles and whooping cough in developed countries.

T

which of the following is/are true regarding viruses? a)viruses are composed of cells b)outside of host cells, viruses are inactive c)viruses can only multiply within host cells

b

The domains______ and _______ are made up of prokaryotes

bacteria and archaea

prions are_____. a) a type of bacterium b) a type of viroid c) infectious proteins d) a type of virus

c

which of the following is true regarding all prokaryotes? a) are motile b) have peptidoglycan c) lack a nucleus d) cause disease

c

Because they are often caused by a Helicobacter pylori infection, most stomach ulcers are treatable with _________. a) a vaccine b) antacids c) surgery d) antibiotics

d

in algae, photosynthesis takes place in _____, which have chlorophyll,a green pigment a) cell membrane b) cytoplasms c) mitochondria d) chloroplasts

d

which of the following has a defines nucleus and various organelles? a) E.coli b)viruses c) prokaryotic cell d) Eukaryotic cell

d

which of the following is a diiference between archea and bateria? a) archea are generally rod-shaped whereas bacteria are generally round b) archaea have a nucleus and bacteria do not. c) bacteria are found in extreme environment whereas archaea are not. d) bacteria possess peptidoglycan in their cell walls whereas archaea do not

d

which of the following diseases killed 1/3 of the population of Europe in the 14th century? a) whooping cough b) cholera C) pneumonia d) smallpox e) plague

e

An infectious disease that has become more common in the last 35 years is referred to as an _________ infectious disease(EID)

emerging

a testable explanation for an observation is called a(n)

hypothesis

A______ is the term used for any disease-causing microorganisms.

pathogen

algae and protozoa are also referred to as ____, a diverse group that falls within the domain Eukarya.

protists

algae are _____.

single celled, photosynthetic eukaryotes multicellular, photosynthetic eukaryotes

When an extensive amount of experimental evidence supports a hypothesis, the explanation may become a scientific _______

theory

which of the following are classified as a acellular infectious agent? archea viroids viruses prions

viroids viruses prions

which types(s) of microorganisms have cells that lacks membrane-bound organelles? a) bacteria b) protists c) archaea d) yeast

A & C

spongiform encephalopathies are caused by infectious proteins. This info indicates that the infectious agents is a _____. a)virus b)prion c) viroid

b

which disease is less common due to rat control, precautions taken with infected patients, and antobiotic treatment? a) foot-and-mouth disease b) plague c) pollo

b

which of the following is/are true regarding viruses? a) viruses can only multiply within host cells. b) viruses are composed of cells c) outside of host cells, viruses are inactive

A &C

all of the following are factors that account for the emergence of new disease in developed countries except______ a) suburban expansion into rural areas b) change in the organism's DNA c) changing lifestyles of humans d) parents don't have their children vaccinated

D

T/F: we could not survive without microorganisms, but they can also be harmful

T

in algae, photosynthesis takes place in _____,which have chlorophyll, a green pigment

chloroplasts

a scientific experiment includes a component that rules out alternative explanations of the results by showing that the only feature that varied in the experiment was the characteristics being tested. The component that does this is called a _____.

control

A patient living in Seattle, WA is diagnosed with malaria. What is the most likely explanation for this diagnosis? a) the patient was infected while visiting a country where malaria is endemic. b) the patient was bitten by a mosquito while hiking in the nearby Olympic mountains. c) the patient was infected by a fellow coworker.

A

All of the following are factors that account for the emergence of new diseases in developed countries EXCEPT ________ a) parents dont have their children vaccinated b) changing lifestyles of humans c) change in the organisms of humans d) suburban expansion into rural areas

A

Although stocks of the causative agents still exist, humans have eradicated(eliminated) which of the following disease? a)smallpox b)AIDS c)Cholera d)Bubonic Plague

A

which disease are due to organisms "jumping" from a natural host to using humans as a host? a) emerging b) resurgetn

A

characteristics of archaea that are similar to bacteria include their_____. a) method of multiplication b) energy sources c) shapes d) ribosomal RNA sequences e) prokaryotic cell structure

A,B,C,E

which of the following is/are true regarding viruses? a) viruses are nonliving b) viruses are prokaryotic c)viruses are smaller than most bacteria d) viruses are acellular

A,C,&D

which of the following statements about the influenza pandemic of 1918-1919 is true? a) because of advances in vaccination, antibiotics, and sanitation, American were mostly spared the ravages of influenza in 1918-1919. b) more Americans died of influenza in 1918-1919 than were killed in WWI and II, and the Korean, Vietnam, and Iraq wars combined. c) immediately following this dreadful pandemic, scientists developed the first flu vaccine, which we still take annually to this day.

B

scientific journals are important because: a) it is how scientific get paid for their work, by earning royalties on their publications b) it allows other scientists to repeat the experiment to ensure the validity of their findings c) it helps ensure that published results are valid and founded in science d) it helps make scientist famous

B & C

which microorganisms lacks a membrane-bound nucleus? a) algae b) bacteria c) yeast d) protozoa e) archaea

B & E

as important decomposers, fungi obtain nutrients by______. a) secreting enzymes to degrade organic material in the environment b) ingesting foods, similar to the process used by animals

a

technically speaking, viruses are not microorganisms because they are not_____. a) composed of cells b) big enough for life

a

compared to the diversity of plants and animals, microbes as a group are____. a) less diverse b) more diverse c) equivalent in diversity

b