a. Acridine orange causes frameshift mutations and frameshift mutations often result in null alleles. b. A +1 frameshift mutation can be reverted by two further single insertions so that the reading frame is re-established.
Q. Can adenine pair with itself?
Adenine always pairs with thymine, and cytosine always pairs with guanine. The pairing nature of DNA is useful because it allows for easier replication. If you know one side of a DNA molecule, you can always recreate the other side. Each base has only one other base it can pair with.
Table of Contents
- Q. Can adenine pair with itself?
- Q. What does GT mutation do?
- Q. What is the most common DNA mutation?
- Q. What triggers a mutation?
- Q. How do you identify a silent mutation?
- Q. What are 3 types of mutagens?
- Q. What are mutagens give 2 examples?
- Q. How do physical mutagens cause mutations?
- Q. What are physical mutagens?
Q. What does GT mutation do?
In effect, the G-T pair has to overcome an energy barrier to form and maintain itself. It turns out that when the G and T bases change shape, they make themselves more energy efficient—still less efficient than a normal base pair, but efficient enough.
Q. What is the most common DNA mutation?
G-T mutation
Q. What triggers a mutation?
Mutations arise spontaneously at low frequency owing to the chemical instability of purine and pyrimidine bases and to errors during DNA replication. Natural exposure of an organism to certain environmental factors, such as ultraviolet light and chemical carcinogens (e.g., aflatoxin B1), also can cause mutations.
Q. How do you identify a silent mutation?
A silent mutation can be caused many ways, but the key point is that it does not change the function of the amino acid or subsequent proteins. A silent mutation is just that: it does nothing significant, not making a sound in the orchestra of the cell.
Q. What are 3 types of mutagens?
Three different types of common mutagens are observed in nature- physical agents, chemical agents and biological agents.
Q. What are mutagens give 2 examples?
Anything that causes a mutation (a change in the DNA of a cell). DNA changes caused by mutagens may harm cells and cause certain diseases, such as cancer. Examples of mutagens include radioactive substances, x-rays, ultraviolet radiation, and certain chemicals.
Q. How do physical mutagens cause mutations?
The chemical or physical agents that cause mutations are called mutagens. Examples of physical mutagens are ultraviolet (UV) and gamma radiation. Radiation exerts its mutagenic effect either directly or by creating free radicals that in turn have mutagenic effects.
Q. What are physical mutagens?
Physical mutagens include electromagnetic radiation, such as gamma rays, X rays, and UV light, and particle radiation, such as fast and thermal neutrons, beta and alpha particles. Mutagenic treatment of seeds is the most convenient and, therefore, the standard method in seed propagated crops.
