Which of the following is a mutagen?
Which of the following is a mutagen?
Examples of mutagens include radioactive substances, X-rays, ultraviolet radiation, and certain chemicals. Complete answer: Mutagen is any physical or chemical agent that changes the genetic material usually DNA of an organism and thus increases the frequency of mutations above the natural level.
Which of these statements is true with respect to the characteristics of mutations?
Answer Expert Verified “they can be harmful or neutral” is the statement among the following statements given in the question that is true with respect to the characteristics of mutations. The correct option among all the options that are given in the question is the second option or option “B”.
What is true about mutations?
A genetic mutation is an alteration of a particular base pair or nucleotide sequence in the genome. Mutations, since they alter the base pair, can change genes and their expression.
What is a mutagen quizlet?
mutagen-A chemical or physical agent that interacts with DNA and causes a mutation.
How do physical mutagens cause mutations?
Irradiation to bring about heritable genetic changes Physical mutagens most often result in chromosome changes and larger DNA deletions while mutagenic chemicals typically cause point mutations. The degree of mutation also depends on the tissue and the time and dosage of exposure.
What are some examples of 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.
How does spontaneous mutation occur?
Mutations arise spontaneously at low frequency owing to the chemical instability of purine and pyrimidine bases and to errors during DNA replication. Another cause of spontaneous mutations is copying errors during DNA replication.
What is gene mutation and its types?
There are three types of DNA Mutations: base substitutions, deletions and insertions. 1. Base Substitutions. Single base substitutions are called point mutations, recall the point mutation Glu —–> Val which causes sickle-cell disease. Point mutations are the most common type of mutation and there are two types.
What is mutant in Tagalog?
Tagalog. mutation. pagbago; mutation. [miutécion] Pagbabago; pagkabago.
What is the define of nutrients?
nutrient. noun. Definition of nutrient (Entry 2 of 2) : a substance or ingredient that promotes growth, provides energy, and maintains life Tomatoes contain a lot of nutrients, among them vitamins C and B-complex and the minerals iron and potassium. —
What are the 7 types of nutrition?
There are seven main classes of nutrients that the body needs. These are carbohydrates, proteins, fats, vitamins, minerals, fibre and water.