#1. Match the following with these A- 1st step of water purification B- 4th step
ID: 102106 • Letter: #
Question
#1. Match the following with these
A- 1st step of water purification
B- 4th step of water purification
C- 5th step of water purification
D- 5tH step of sewage treatment
E- 2nd step of sewage treatment
F- 6th step of water purification
G- 3rd step of water purification
H- 2nd step of water purification
I- 3rd step of sewage treatment
J- 1st step of sewage treatment
K- 4th step of sewage treatment
L- Anaerobic sludge tank
*A bar screen is used to remove grit.
*Water from the secondary settling tank is chlorinated before being released into a stream.
*Organic wastes are allowed to settle out.
* Where usable products are made from the sludge that results from each of the settling tanks
* Flocs are allowed to settle out
* Oxygen content is increased by spraying the water in the air
* The water is filtered
* Large objects are removed
* The water is chlorinated
* Settled material from the microbial decomposition of soluble material is sent to an anaerobic sludge tank.
* Microorganism are allowed to decompose soluble organic material flocculating agents are added.
* Flocculating agents are added.
#2 Why did Biosphere 2 fail?
A- They broke the seal to pump in oxygen?
B- the scientist did not know which microbes to include in their experiments and they guessed wrong
C- the aerobic microbes used more oxygen than expected because the scientist inadvertently overfed them when they were fertilizers.
D- They had not included enough edible animals and they began to starve
#3 What sort of compounds are unable to cycle through the ecosystem?
A- Man-made recalcitrant materials such as plastic
B- naturally- occurring organic compounds
C- naturally-occurring nitrogen-containing compounds
D-cats
#4 What is meant by the assertion that certain elements cycle through the biosphere because of microbial metabolism?
A- bacteria eat new recombinant DNA
B- elements such as nitrogen are converted from one form to another only by microbes
C- Water and CO2 are converted to sugars by means of microbial respiration
D- This is a reference to the extreme variability among bacterial sizes and shapes.
#5 What happens to the CO2 that is released into the environment from various sources (including people exhaling)
A- Autotrophic organisms convert the CO2 to organic compounds
B- Heterotrophic organisms convert the CO2 to organic compounds
C- it places selective pressure on humans to evolve into organisms that can utilize CO2 as a carbon source
D- the CO2 will continue to increase in concentration to the point that all O2- breathing organisms
E- None of the answers
#6 Is it possible to have a self-sustaining, sealed system?
A- yes, it is a simple process
B- yes, biosphere 2 showed that is possible
C- possible, but getting the correct balance would be extremely difficult
#7 How does temperature affect microbial growth?
A- Most microbes are inhibited by cold temp
B- microbes are not affected by temp
C- most microbes grow best in cold temp
#8 A denatured protein is?
A- product of mitochondria
B- mutant, unnatural protein
C- changed in 3D shape and functional abilities
D- confused ribosome
#9 Hand sanitizers are often effective in a inactivation of influenza viruses. What would be the explanation for this?
A- the alcohol in the hand sanitizer denatures the nucleic acid inside the virus.
B- hand sanitizer have enough alcohol in them to dissolve the membrane surrounding the virus. This results in the inactivation of the virus.
C- the ethanol in the hand sanitizer causes the capsid protein to mutate
D- the alcohol in the hand sanitizer gets the virus so drunk it cannot infect a cell
#10 Nosocomial infections are acquired ____
A- from farm animals
B- in a hospital
C- in schools
D- at home
E- by credit card
#11 An antibiotic that is effective against strep throat ( caused by the gram-positive streptococcus pyogenes) and the plague (caused by the gram negative Yersinia pestis) would be considered to be:
A- wonder drug
B- broad spectrum antibiotic
C- a broad spectrum antifungal compound
D- a narrow spectrum anti fungal compound
#12 Light of ultraviolet wavelengths may cause you to develop tanned skin, but also,
A- causes decreased blood pressure
B- denatures the proteins of the bacteria on your skin
C- causes bacteria on the skin to rapidly expand their populations
D- damages your dna, as well that of microbes, potentially causing lethal mutations
E- causes a rapid expansion of viruses on skin cells.
#13 What instrument (piece of equipment) is used to sterilize things in a hospital and by what method is it killing things?
A- an inceration oven uses intense heat to sterilize things
B- an autoclave uses steam and pressure to sterilize things
C- a drying oven uses low heat for long periods of time to sterilize things
D- an autoclave uses poisonous gases to sterilize things
Explanation / Answer
Ans-1
A- first step of water treatment- big object are removed.
B- fourth step of water treatment- water is filtered.
C- fifth step of water treatment-water is chlorinated.
D- fifth step of sewage treatment-Water from the secondary settling tank is chlorinated before being released into a stream.
E- second step of sewage treatment- Organic wastes are allowed to settle out.
F- sixth step of water treatment-Oxygen content is increased by spraying the water in the air.
G- third step of water treatment- flocs are allowed to settle down.
H-second step of water treatment- flocculating agents are added.
I- third step of sewage treatment-Microorganism are allowed to decompose soluble organic material flocculating agents are added.
J- first step of sewage treatment- A bar screen is used to remove grit.
K- fourth step of sewage treatment-Settled material from the microbial decomposition of soluble material is sent to an anaerobic sludge tank.
L-anerobic sludge tank-Where usable products are made from the sludge that results from each of the settling tanks
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