DNA consists of two types of nitrogenous bases: Purine and Pyrimidine. Purine is a double ringed structure that includes Adenine (A) and Guanine (G) while pyrimidine is a single ringed structure that includes Thymine (T), Cytosine (C) and Uracil (U). In a DNA helix pairing takes place between one purine and one pyrimidine. A pairs with T and U (in case of RNA) and G pairs with C. During a mutation, it is more likely for A to get mutated to G than to T because A and G are similar in structure than T and C and the structure of DNA is not changed.
I will support the notion that the human body is made up of the four types of macromolecules which can be seen below:
<h3>What is a Macromolecule?</h3>
These are referred to the large molecules which are involved in the biochemical activities of the body and examples include protein, lipid etc.
All cells in the body however contain all the macromolecules because Protein acts as the building block for the cells while carbohydrates are usually stored in cells as glycogen. Lipids form part of the membrane and nucleic acids such as DNA are present in all parts of the body.
Read more about Macromolecule here brainly.com/question/5246898
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I believe the answer is:
The "spontaneous firing rate" of a neuron refers to <span>its rate of producing action potentials even when it is not stimulated.</span>
One cell can divide into two new cells. This is called mitosis. The process of cell division goes through various stages. First the cell nucleus divides into two. A new cell surface membrane then severs the cell divides. The two new cells are called daughter cells and they are small. They will grow larger. they grow by getting nutrients from the food that is eaten. Once they grow to full size they can also reproduce or divide. If cells divide more quickly than they should, or divide in the wrong way, diseases may develop.
I therefore, think all your answers are correct.
