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Sphinxa [80]
3 years ago
5

The Beadle and Tatum experiments were based on all of the following assumptions except that _______. X-irradiation can induce mu

tations. supplemented media permit growth of auxotrophic strains of Neurospora two strains of auxotrophic Neurospora that grow on minimal medium supplemented with biotin have mutations in the same gene auxotrophs fail to grow on minimal media
Biology
1 answer:
icang [17]3 years ago
8 0

Answer:

The correct answer to the question: The Beadle and Tatum experiments were based on all of the following assumptions, except that:___, would be: Two strains of auxotrophic Neurospora grow on minimal medium supplemented with biotin have mutations in the same gene.

Explanation:

The experiment that was carried out and presented by George W. Beadle and Edward L. Tatum, in 1941, shed a lot of light not only on how enzymes and other proteins and chemical reactions function, but also the role that genes play in these processes, especially when there is presence, or absence of certain conditions. The experiment was titled: "Genetic Control of Biochemical Reactions in Neurospora" and it worked particularly with samples of the bread mold known as Neurospora. It is called auxotrophic because this type of mold was found to be incapable of producing certain compounds that were required for its proper functioning and development. The only principle on which this particular experiment was not based on ws the assumption the one on the second to last answer option. All the other options were part of the assumptions that these researchers had.

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Answer:

observational learning

7 0
3 years ago
Suppose a plant breeder wants to isolate mutants in tomatoes that are defective in DNA repair. However, this breeder does not ha
Nana76 [90]

The provided question has marked options incorrectely the correct order as follows:

A) Expose putative DNA repair mutant plants to ionizing radiation L and see if they survive less well than wild-type plants.

B) Measure the amount of post-translational processing that occurs in the putative DNA repair mutant plants.

C) Measure the somatic mutation rates for the putative DNA repair mutant plants.

D) Expose the putative DNA repair mutant plants to a deaminating agent and select those that have a decreased mutation rate.

E) Measure the germline spontaneous and induced mutation rates for the putative DNA repair mutant plants.

Answer:

The correct answer is: A), C) and E)

Explanation:

The breeder wants to isolate the mutants in tomatoes that are defective in DNA repair, to identify such plants breeder should follow these methods as they will allow best to identifying the defective tomatoes-

Measure the somatic mutation rates for the putative DNA repair mutant plants.

Measure the germline spontaneous and induced mutation rates for the putative DNA repair mutant plants.

Expose putative DNA repair mutant plants to ionizing radiation L and see if they survive less well than wild-type plants.  This will allow the breeder to see and analyze the ability of DNA repair in tomatoes

7 0
4 years ago
Which of the following scenarios would likely happen if the phytoplankton population was greatly reduced
KatRina [158]

Answer:

Your answer is B: The population would increase.

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8 0
2 years ago
Myristoyl-CoA is a saturated fatty acid with 14 carbons attached to coenzyme A. How many molecules of ATP would be generated fro
sladkih [1.3K]

Answer:

Total ATP molecules produced = 94 molecules of ATP

Explanation:

Myristoyl-CoA, is a saturated fatty acid with 14 carbons which has been activated for oxidation by attachment to coenzyme A. When it has undergone complete oxidation, it will yield 7 acetyl-CoA molecules and 6 FADH₂ and 6 NADH molecules each.

Each of the 7 acetyl-CoA molecules obtained from its initial oxidation enters into the citric acid cycle and is completely oxidized to yield further ATP and  FADH₂ and NADH molecules.

The overall yield of ATP from the various enzymatic steps is shown below:

Acyl-CoA dehydrodenase = 6 FADH₂

β-Hydroxyacyl-CoA dehydrogenase = 6 NADH

Isocitrate dehydrogenase = 7 NADH

α-Ketoglutarate dehydrogenase = 7 NADH  

Succinyl-CoA synthase = 7 ATP (from substrate-level phosphorylation)  

Succinate dehydrogenase = 7 FADH₂

Malate dehydrogenase = 7 NADH

Note: 1 FADH2 molecule yields 1.5 ATP; 1 NADH molecule yields 2.5 ATP molecules. Therefore,

Total ATP  from FADH₂ molecules = 13 * 1.5 = 19.5  

Total NADH molecules = 27 * 2.5 = 67.5

Total ATP molecules produced = 19.5 + 67.5 + 7  = 94

Total ATP molecules produced = 94 molecules of ATP

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4 years ago
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