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mario62 [17]
2 years ago
4

While doing research on deep-sea vents, you discover a very simple new life form. After some initial analysis, you find that thi

s life form contains small fragments of DNA, small complementary RNA fragments, and proteins. Fortuitously, you collected two strains, one that is purple and one that is yellow. You wish to discover which of those three molecules could be the genetic material. You heat-kill some of the purple life form and subject three different homogenized samples to different enzymes: DNase, RNase, or protease. Which sample will NOT transform yellow into purple?
a. RNase
b. protease
c. All will cause transformation.
e. None will cause transformation.
Biology
2 answers:
Rus_ich [418]2 years ago
7 0

Answer:

The correct answer is option c. "All will cause transformation".

Explanation:

In this experiment, two strains of a new life form are analyzed to see if small fragments of DNA, small complementary RNA fragments or proteins are the genetic material. Since one strain is yellow and one purple, the yellow strain was heat-killed and subjected to DNase, RNase, or protease. The only enzyme that will not cause that the yellow sample is transformed into purple will be the DNase, since DNA carries the genetic information, but RNA and proteins are the ones that will result in changes on the phenotype if they are broken down. Therefore, both RNase and protease will cause transformation.

Bess [88]2 years ago
5 0

Answer:

a. RNase

Explanation:

RNA-based microbiological analyses, e.g., transcriptome and reverse transcription-quantitative PCR, require a relatively large amount of high quality RNA. RNA-based analyses on microbial communities in deep-sea hydrothermal environments often encounter methodological difficulties with RNA extraction due to the presence of unique minerals in and the low biomass of samples. In the present study, we assessed RNA extraction methods for deep-sea vent chimneys that had complex mineral compositions.

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Which molecule listed is most likely to cause osmosis in the body? protein glucose oxygen sodium chloride?
mario62 [17]

The answer is protein

Osmosis happens when the osmotic pressure of two container separated by semipermeable membrane is different. The osmotic pressure could be exert by polar solute because they will attract water molecule. Protein, glucose, and sodium chloride is the common molecule that could cause osmosis. But protein is the main substance that keep the osmotic pressure of the blood in the body.

3 0
2 years ago
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Imagine you are a red blood cell sitting in the right atria of the heart. Write a paragraph that describes what happens to this
alexandr402 [8]

Answer:

A red blood cell, sitting in the right atria of the heart is chocolate-brown in color since its a deoxygenated red blood cell with carbon dioxide rather than oxygen in its hemoglobin.

 

First

The tricuspid valve pumps it through the right ventricle

Secondly

pulmonary valve pumps it from the right ventricle to the pulmonary circulation.

Then

In the alveoli of the lungs, gas exchange occurs during pulmonary circulation

The end product is oxyhemoglobin( bright red colour) I.e oxygenated blood

The next step

pulmonary veins is the means whereby the red blood cell go to the left atria from the pulmonary circulation through the aortic valve

to mitral valve then to the aorta and systemic circulation

Therefore

oxygen is replaced by carbon dioxide during systemic circulation indicating a end to cellular respiration

Lastly

It's transported back to the right atrium of the heart completing the cardiac cycle.

3 0
2 years ago
Rotenone, a piscicide (fish poison), interferes with the transfer of electrons between Complex I and Complex II in the process s
Bingel [31]

Answer:

Mitochondria stops working.

Explanation:

When the mitochondria of fish exposed to Rotenone, it inhibits the cellular respiration which is the main cause of death of fishes. This inhibiting of cellular respiration in mitochondria leads to reduction in cellular uptake of oxygen and this reduction is responsible for the death of fishes. This Rotenone releases by the plants present in the water as well as used as pesticides for killing of fishes.

8 0
2 years ago
In hummingbirds feather color is incompletely dominant. A rather large population of hummingbirds has 396 red-sided individuals
GrogVix [38]

Answer:

a) Frequency of the R allele: [(396 x 2) + 257] / (396 x 2) + (257 x 2) + (557  x 2) = 1049 / 2420 = 0.433

b) Frequency of the r allele: [(557 x 2) + 257] / (396 x 2) + (257 x 2) + (557  x 2) = 1371 / 2420 = 0.567

c) Frequency of the R allele: [(196 x 2) + 257] / (196 x 2) + (257 x 2) + (557  x 2) = 649 / 2020 = 0.321

d) Frequency of the r allele: [(557 x 2) + 257] / (196 x 2) + (257 x 2) + (557  x 2) = 1371 / 2020 = 0.679

e) migration is gene flow  

Explanation:

Gene flow (also referred to as gene migration) is the movement of genes that acts to change allele frequencies in local populations by transferring genetic material from one population to another. Gene flow may be caused either by the movement of organisms that reproduce in new populations (migration), or by the movement of gametes (for example, pollen dispersal in plants).

7 0
2 years ago
The spark of life where did organic molecules come from case study answers
Veronika [31]
<span>The spark of life is heavily debated but many scientists believe that lightning in the Earth's atmosphere created the atmospheric conditions necessary for the molecular process. Certain elements such as water vapor and hydrogen sulfide were part of a bonding process that began the first spark of life.</span>
7 0
2 years ago
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