The radioactive isotope 32P labels the T2 phage’s _____.

This is the answer and explanation to the biology questionThe radioactive isotope 32P labels the T2 phage’s _____. You can find the answer in this post.

The radioactive isotope 32P labels the T2 phage’s _____.

  • Below are the correct answer and explanations.


The atom of an element consists of a nucleus and electrons, which in turn consist of protons and neutrons. The same element has the same number of protons but can have different numbers of neutrons. Such elements with the same number of protons but different numbers of neutrons are called isotopes.

Among them, there are some isotopes whose nuclei can spontaneously emit particles or rays, releasing a certain amount of energy.

At the same time, the number of protons or neutrons changes, thus transforming into the nucleus of another element. This property of an element is called radioactivity. Such a process is called radioactive decay, and these elements are called radioactive elements.

Isotopes that are radioactive are called radioisotopes. The element that undergoes radioactive decay is called the parent, and the element formed by radioactive decay is called the daughter.

Basic characteristics of radioactive elements

The most fundamental characteristic of radioactive elements is their constant isotopic decay. As a result of decay, the number of parent radioisotopes is decreasing, but the number of atoms in their daughter is increasing.

Since the decay of radioisotopes is not controlled by external temperature, pressure or chemical conditions. The magnitude of the decay rate is entirely inherent to each radioactive element. The number of atoms decaying is only time-dependent.

If the number of parent radioactive elements at the beginning is N, after a period of time dt, the product of the number of radioactive elements that have decayed, dN, and the number of remaining parent elements that have not decayed, N and dt, is proportional.

Applications of Radioisotope Technology

Radioisotope technology has been widely used in many fields of economy. The application in many fields of industry, agriculture, medicine, resources and environment, military research has gained significant economic, social and environmental benefits, and is also one of the important aspects of nuclear energy utilization.

Mixing a stable chemical element with its radioactive isotopes. When they are involved in the movement and changes of various systems, as the radioactive isotopes can emit rays, measuring these rays can determine their location and quantity.

Once the distribution and movement of radioactive isotopes are measured, the various roles of stable chemical elements can be determined. This method is called the tracer atom method and is widely used.

T2 phage

T2 phage is a strain of phage and belongs to the T family of phages. It is a class of viruses that are parasitic in bacteria and have a tadpole-like shape. The head is a positive 20-sided body with a protein shell and a DNA-encapsulated head as the genetic material.

When a T2 phage infects a host, the tail sheath contracts, and the DNA from the head is injected into the cell through the hollow tail. The DNA from the head is injected into the cell through the hollow tail, and then the host is synthesized into the daughter phage by the material in the host.

T2 phage is a virus that is exclusively parasitic in E. coli and reproduces relatively rapidly. Its head and tail shells are composed of proteins, and the head contains DNA.

Once the phage has infested E. coli, it will use the material in E. coli to synthesize its own constituents and proliferate in large numbers under the action of its own genetic material. When the phage proliferates to a certain number, E. coli lyses and releases a large number of phages.

Correct Answer

Here is the correct answer to The radioactive isotope 32P labels the T2 phage’s _____.

  • DNA

The radioactive isotope 32P labels the T2 phage’s DNA.

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