Test
Lectures 19 and 20
Este test tiene tipos de pregunta que se abren en el reproductor de siempre.
Preguntas del test (21)
1[blank_start]Microbial[blank_end] [blank_start]mats[blank_end] are formed by photosynthetic organisms colonized together
- AMicrobial
- Bmats
2Stromatolites are ancient microbial mats.
- AVerdadero
- BFalso
316S rRNA...
- Aare used to sequence comparisons between species
- Bare ribosomes
- Care very long
- Dhave different functions in all organisms
- Eare genes that all organisms have
4The [blank_start]distance[blank_end] [blank_start]matrix[blank_end] is calculated from the number of sequence differences.
- Adistance
- Bmatrix
5The overuse of antibiotics creates [blank_start]selection[blank_end] for resistant organisms and [blank_start]against[blank_end] non-resistant organisms.
- Aselection
- Bagainst
6Genetic drift is the result of certain members of a population reproducing faster.
- AVerdadero
- BFalso
7Closely related microbes don't have significant differences in their genetic makeup.
- AVerdadero
- BFalso
8Molecular sequence analysis of several different genes
- Awhole genome analysis
- Bribotyping
- Cmultilocus sequence typing
9FAME analysis is useful for microbial communities.
- AVerdadero
- BFalso
10Bacteriorhodopsin is used by some Archaea for what purpose?
- Ato fix carbon dioxide
- Bto protect DNA in the cells of hyperthermophiles
- Cto generate energy
- Dto bind coenzyme f430 during methanogenesis
- Eto convert nitrates into nitrites
11Nanoarchaeum equitans is an example of a microbe that evolved a reduced genome size that is missing genes for synthesis of amino acids, nucleotides, and other molecules. What is the reason for this?
- ANanoarchaeum cells actually do not contain a DNA genome.
- BNanoarchaeum lives as a parasite that is attached to another larger host cell, so it obtains nutrients from its host cell rather than synthesizing them.
- CNanoarchaeum never grows or divides, so most nutrients are rarely needed.
- DNanoarchaeum is actually classified as a virus, so it can only have a very small genome.
12Terrestrial sulfatara habitats are extremely acidic, mostly due to the microbial metabolic oxidation of
- Amethane
- Bhydrogen peroxide
- Csulfur
- Dnitrate
13Ions that stabilize glycoproteins on the exterior.
- Aexternal sodium ions
- Binternal potassium ions
14Ions that stabilize cytoplasmic proteins and ribosomes.
- Ainternal potassium ions
- Bexternal sodium ions
15Bacteriorhodopsin contains [blank_start]retinal[blank_end], which undergoes a light catalyzed conformational change to generate ATP in phototrophs.
- Aretinal
16Methanogens
- Aconvert carbon dioxide to methane
- Butilize cofactors that are not found in nature
- Clive in anoxic lake sediments and animal digestive tracks
- Dare closely related to pyrococcus
17Which archaea live imm thermal water habitats of 100 degrees Celsius, get their energy from oxidation of amino acids and reduction of sulfur, and are used as a source of DNA polymerase for PCR?
- Apyrococcus
- Barchaeglobus
- Cthaumarchaeota
- Dsolfolobus
18Thaumarchaeota...
- Aget their energy from nitrification (NH3 to NO2-)
- Badapted to very low nutrient levels
- Care 100 times smaller than E. Coli
- Dlive in acidic terrestrial sulfur springs called solfataras
19Solfolobus...
- Aare part of the crenarchaeota phylum
- Bproduce energy from oxidation of sulfur and reduction of oxygen
- Care found in deep ocean vents
- Dare an important part of the global nitrogen cycle
20Salt bridges create strong contacts between different parts of the polypeptide chain, which is resistant to unfolding at high temperatures.
- AVerdadero
- BFalso
21Which of the following increase DNA stability?
- ANa+
- Bpositive supercoils to DNA
- Cbinding proteins that are similar to histones
Información
- Descripción
- Test sobre Lectures 19 and 20, creado por Erica Bolz el 05/11/2015.
- Autor
- Erica Bolz
- Idioma
- English
- Visitas
- 0
- Valoración
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