In the sediments at the bottoms of ponds and lakes, there is oftenabsolutely no O2 at depths of 0.5 cm or more, even if the waterabove is rich in O2. How is this possible?

Q: Are all organisms with oxidative respitory pathways necessarily strict aerobes? Explain.

A: Oxygen is the last electron acceptor toward the finish of the electron transport chain of vigorous…

Q: 1 (a)Why is the spectrophotometer set at 0.000 absorbance for the uninoculated tube of broth? (B)…

A: A spectrophotometer is an instrument that measures the number of photons (light intensity) absorbed…

Q: In what ways are Ca and Si cycling in oceanwaters similar, and in what ways do they differ?How do…

A: The environmental factors such as temperature, precipitation, solar energy, soil, and others are…

Q: Given that the bottom of the ocean is anaerobic, what process in the nitrogen cycle is likely to be…

A: Nitrogen Cycle --Nitrogen is present in our atmosphere about 78% of the atmospheric gasses is…

Q: Some suggest that lakes without fish populations due to acid depostiion can simply be stocked with…

A: The impact of acid deposition on aquatic ecosystems, particularly lakes, is a significant…

Q: equires oxygen at a lower concentration than typically found in air.   Question 3 options:   a)…

A: Throughout nature, aerobic and anaerobic environments can be found in diverse niches. These…

Q: With the consideration of thermodynamics, why would a bacterium that can oxidize ammonia to nitrate…

A: In complex microbial competition, thermodynamics determines organism success. Some of these bacteria…

Q: Design an experiment to solve the following problem:Determine the rate of methanogenesis (CO2 + 4H2…

A: Methanogenesis is process of methane formation by methanogens (microorganisms can produce methane).…

Q: What is the range of salinities over which Halobacterium NRC-1 is able to survive? Why specifically…

A: The range in which Halobacterium NRC-1 would able to survive is between 234 ppt and 468 ppt…

Q: Which of the following is capable of oxidizing elemental sulfur to sulfates? Bacillus GSB and PSB…

A: Plants and animals require a continuous supply of sulphur and its compounds in order to synthesise…

Q: The formation of hydrophobic bonds is the primary driving force behind aggregation of amphiphiles in…

A: False. The primary driving force behind the aggregation of amphiphiles (such as surfactants or…

Q: An acidophile would grow best at a pH of: A.6 b.2 c.12 d.7 e 9

A: The optimum pH is the pH at which the enzyme works efficiently. Because the enzymes are found more…

Q: The image depicts indole results on SIM agar for Sulfur Reduction Please help me to figure out its…

A: Introduction:  SIM medium is used to test three things, as the name suggests. These include Sulfur…

Q: A chemolithoautotroph is respiring using only iron (Fe3+) and nitrite (NO2-). This bacterium does…

A: * Chemolithoautotrophs are autotrophic organisms gets their energy that is ATP from oxidation of…

Q: Competitive exclusion is rarely observed in ecosystems. Propose an explanation for this.

A: An ecosystem is a community of different species of living organisms and their physical environment.…

Q: What metabolic process creates the rotten-egg smell characteristic of many anaerobic environments?

A: Hydrogen sulfide gas has the chemical formula H2S and possesses a characteristic rotten eggs smell.…

Q: Sketch graphs expected for the Product concentration Vs substrate concentration.

A: Enzymes can be defined as proteins that help to speed up the metabolism. They basically act as…

Q: Account for the inability of aerobes to grow in the absence of O2

A: Aerobes require oxygen and cannot perform their metabolic processes in the absence of oxygen. These…

Q: Was there any difference in the amount of gas produced by yeast in room temperature tapwater…

A: Saccharomyces cerevisiae, more commonly known as Baker’s Yeast, is a single-celled microorganism,…

Q: What are the possible types of respiration that oxidase-positive samples might be capable of?…

A: A bacterium is a microscopic, unicellular organism that is capable of living in a variety of…

Q: Why would increasing energy efficiency in homes and businesses across the united states reduce the…

A: In United States, energy efficiency could be increased by  1. Turning thermostats down in winter and…

Q: Clostridium tetani is a common soil bacterium and causes tetanus. Would you expect C. tetani to…

A: Clostridium tetani, a Gram-positive rod that forms a terminal spore is commonly found in the soil,…

Q: Explain why you can use OD675 (optical density at a wavelength of 675nm) as a proxy for cell density…

A: Algae are group of predominately aquatic, photosynthetic, and nucleus bearing organism lacking true…

Q: If two cultures of a facultative anaerobe were grown under identical conditions except that one was…

A: Bacteria are microscopic organisms which belong to prokaryote because these are unicellular…

Q: Abacteria isolated from Yellowstone National Park is found to use the chemical methane as a food…

A: Chemotrophs are organisms whose energy source is obtained by the oxidation of inorganic…

Q: Consider the following structure. CO₂CH2CH3 CO₂CH2CH3 This substance could be produced by the…

A: True.As it was a Diels-Alder Reaction so the given structure will be produced.Explanation:It is a…

Q: What carbon compound is the least available for the majority of life forms and why is this the case?

A: Carbon is present in the environment in many forms yet most living forms are not easily accessible…

Q: Are there any types of Bacteria or Archaea that areable to oxidize ammonia to nitrate?

A: Archaea and bacteria are referred to as prokaryotic unicellular organisms. Initially, archaea were…

Q: Determine how many water molecules are used to completely oxidize Lignocerate (24:0) 8 10 014 011 9…

A: Fatty acids are long chain hydrocarbons with a carboxyl end. Glycogen is the storage form of…

Q: Which of the following is a nitrogenous waste product that is rarely the final product eliminated by…

A: Kidneys are the organs belong to excretory system in our body and play a major role in several other…

Q: A chemolithoautotroph is respiring using only iron (Fe3+) and nitrite (NO2-). This bacterium does…

A: Chemolithoautotrophs donot have any organic electron acceptor and hence they have devised an…

Q: Nitrogen fixing organisms have unique problems in terms of energy production and the need for low O2…

A: Symbiotic relationships between nitrogen-fixing bacteria and some individuals from each of the major…

Q: cens require organic carbon and energy source, and prefer to live in an fully oxygenated…

A: E.coli is a Gram Negative, rod shaped, bacteria. It is commonly found in the lower intestine of…

Q: Explain why sdLDLs are more atherogenic than buoyant LDLs.

A: Lipoprotein can be defined as a biomolecule that is made up of fat droplets encircled by a…

Q: Identify the oxidizing agent in the following REDOX reaction?  CI2 + NaBr --> NaCI + Br2 A) NaCI…

A: A redox reaction can be defined as a chemical reaction in which electrons are transferred between…

Q: Given what is known about humans, why is it unlikely that a thermophile or a psychrophile would be a…

A: .m Humans are warm-blooded. Their body temperatures do not change when the temperature outside…

Q: What particular pathways or enzymes appear distinct for sulfate reducing bacteria in order to…

A: INTRODUCTION : Sulfate reducing bacteria - It is a type of bacteria which can reduce sulfate.They…

Q: Colin and Enterobacter aerogenes sho

A: Escherichia coli is a kind of bacteria that is generally present in the intestines of humans and in…

Q: Why will a strict anaerobe grow in thioglycollate broth even when the medium is exposed to…

A: Introduction :- Anaerobic bacteria are microorganisms that can thrive without oxygen. For instance,…

Q: if a bacterium lacks cytochrome C oxidase, does that make the bacterium an anaerobe? Explain?

A: Cytochrome c oxidase  is an enzyme present in the cytochrome sub unit. This is found in the electron…

Q: What is one of the main aspects of design for Enhanced Biological Phosphorus Removal (EBPR)?   a)…

A: EBPR is a sewage treatment method that is used to remove phosphate from sludge (activated).

Q: Organısms that grow at temperatures in excess of 100 C are known as A) O thermophiles. B) O extreme…

A: For, the various organisms to sustain their lives, there is a range of parameters such as…

Q: Fixing free nitrogen from the air means converting into ions that can be used by many types of…

A: Nitrogen cycle  It is biogeochemical cycle of nitrogen where nitrogen converted into many chemical…

Q: 5. When TSIA agar is inoculated with Salmonella typhimurium, the bacteria are growing in the butt of…

A: Agar is a type of gelatinous substance derived from red algae. It is widely used in microbiology as…

Q: A chemolithoautotroph is respiring using only iron (Fe3+) and nitrite (NO2-). This bacterium does…

A: The lithoautotrophic bacteria are classified into two groups, one is photoautolithotroph that derive…

Functional Diversity