Please help fast......

The occurrence of the same amino acid sequence in the digestive proteins in two morphologicallyurderelated species provided evid

dlinn [17]

Explanation:

If each nucleotide determined an amino acid, we could only code four

different amino acids since in DNA there are only four different nucleotides. Figure very

less than the 20 different amino acids that exist.

If every two nucleotides will encode an amino acid, the total number of different dinucleotides

that we could achieve with the four different nucleotides (A, G, T and C) would be variations

with repetition of four elements taken two at a time VR4,2 = 42 = 16. Therefore,

we would have only 16 different dinucleotides, less than the number of amino acids

different that exist (20).

If each group of three nucleotides determines an amino acid. Given that they exist

four different nucleotides (A, G, T and C), the number of groups of three different nucleotides

that can be obtained are variations with repetition of four elements (the four

nucleotides) taken three at a time: VR4.3 = 43 = 64. Therefore, there is a total of 64

different triplets, more than enough to code the 20 different amino acids.

4 0

3 years ago

The discovery that syphilis led to paralysis and to delusions of grandeur supported the _____ perspective.

notka56 [123]

The discovery that syphilis led to paralysis and to delusions of grandeur

supported the somatogenic perspective.

<h3>What is Somatogenic perspective?</h3>

Somatogenic perspective is defined as personality disorder which arise as a

result in changes in the physiological or biochemical aspect of the body. The

personality trait is delusions of grandeur which is when an individual thinks

he has more power or other traits than normal.

<h3>Relationship between Syphilis and delusion of grandeur</h3>

Delusion of grandeur is common in people with Syphilis and can be

classified as being under personality disorder which is why Somatogenic is

the most appropriate choice.

Read more about Somatogenic here brainly.com/question/4511566

5 0

3 years ago

PLS HELP ME

NikAS [45]

Answer:

so to be honest I don't know how to do this

8 0

2 years ago

Which characteristics can be inherited?

poizon [28]

C) Ability to roll the tongue is inherited.
Length of hair is conditional upon the environment, not necessarily genetics.
Ability to play piano is taught not passed through genetics.
Appetite of a puppy depends on nutrition amount.

5 0

3 years ago

Read 2 more answers

alfred hershey and martha chase designed an experiment to determine the chemical makeup of griffith's transforming principle. de

MAXImum [283]

Answer:

Bacteriophages (phages) are viruses that infect only bacteria and do not infect mammalian or plant cells. Phages are ubiquitous in the environment. Phages or bacteriophages were chosen as a model system for their simplicity, as they only contained protein-coated nucleic acid. Alfred D. Hershey and Martha Chase (who were part of the bacteriophage group) in 1952 studying the infection of the bacterium Escherichia coli by the T2 phage show that the information definitely resides in the DNA. They used phage with either [32P] -labeled DNA or [35S] -labeled proteins to infect the bacteria. Immediately afterwards, they centrifuged the sample so that the infected bacteria remain in the pellet and the virus capsids (proteins) remain in the supernatant. [35S] is found in the supernatant, whereas [32P] is found in bacteria. After one cycle of infection, it was observed that when phage labeled in the [35S] proteins were used, only 1% of the radioactivity was incorporated into the progeny. But when phages were [32P] labeled, more than 30% of the radioactivity was in the progeny. They showed directly that what is transmitted from one progeny to another is the DNA and not the proteins, despite having first "diluted" in a bacterium.

Explanation:

Bacteriophages are viruses that infect bacteria in a specific way. Bacteriophages, like other known viruses, are found in an intermediate zone between living organisms and inert matter. Bacteriophages bind to the host pathogenic bacterium, introduce their genetic material, replicate inside it and destroy it. Hersey, along with his assistant Martha Chase, used phages because they knew that T2 phages were made up of 50% proteins and 50% nucleic acids and that phages entered bacteria and reproduced. As the progeny carried the same infection traits, the genetic material of this had to be transmitted to the offspring, but the mechanism was unknown. These scientists carried out an experimental work with the T2 virus, a bacteriophage that infects the bacterium Escherichia coli, which it reproduces by attaching itself to the outer wall of the bacterium, injecting its DNA into it where it replicates and directs the synthesis of the phage's own proteins. Phage DNA is encapsulated within proteins and produces phages, which lyse or disrupt the cell and release phage from progeny. They infected a culture of bacteria with radioactively labeled phages: the protein coat with sulfur (35S) and its DNA with phosphorus (32P). After infection, they separated the phages from the bacteria by violent shaking using a mixer (hence the name of the experiment). By centrifugation the much smaller phages remained in the supernatant and the much larger bacteria in the pellet. 85% of the radioactivity corresponding to DNA appeared in the pellet and 82% of the protein in the supernatant. This result supported the idea that DNA was the only component of the bacteriophage that penetrated the interior of the bacteria and, having the ability to form new phages, constituted the genetic material.

5 0

3 years ago