science
Grade-10
Easy
Question
Ionizing radiations include:
X- rays.
Alpha rays.
Gamma rays.
All of the above.
X- rays.
Alpha rays.
Gamma rays.
All of the above.
Hint:
Ionizing radiations have short wavelength.
The correct answer is: X- rays.
- Ionizing radiations are electromagnetic radiations
- They have the capacity to ionize an atom by removing an electron
- The ionizing radiations have shorter wavelength but high energy
- X-rays, UV rays, gamma rays are all ionizing radiations
- The ionizing radiations are classified under physical mutagens
- Ionizing radiations induce mutations by introducing DNA breaks or by generation of reactive oxygen species like hydroxyl radicals
- Mutagens are the factors that cause mutation
- Physical mutagens include ionizing radiations, high concentration of carbon dioxide, etc
Related Questions to study
science
Generally, the mutations are:
- In harmful mutation, due to insertion or deletion of a base the resulting protein synthesis become faulty
- In silent mutation, the alteration in base sequence is such that the final protein is not changed
Generally, the mutations are:
scienceGrade-10
- In harmful mutation, due to insertion or deletion of a base the resulting protein synthesis become faulty
- In silent mutation, the alteration in base sequence is such that the final protein is not changed
science
Which of the following base analogs exhibit tautomerism?
- Base analogues have structure similar to the common bases (Adenine, guanine, cytosine and thymine)
- 5bromouracil is the base analogue for thymine
Which of the following base analogs exhibit tautomerism?
scienceGrade-10
- Base analogues have structure similar to the common bases (Adenine, guanine, cytosine and thymine)
- 5bromouracil is the base analogue for thymine
science
Point Mutation is caused by:
- Point mutation can be caused due to substitution by a base analogue or due to exposure to ionizing radiations as well
- Point mutation can also be due to deletion or insertion of a base pair
Point Mutation is caused by:
scienceGrade-10
- Point mutation can be caused due to substitution by a base analogue or due to exposure to ionizing radiations as well
- Point mutation can also be due to deletion or insertion of a base pair
science
Examples of base analogs are ________.
- Base analogues are naturally occurring molecules having similar structure to common bases
- 5BU has structure similar to thymine
- 2aminopurine has structure similar to purine
Examples of base analogs are ________.
scienceGrade-10
- Base analogues are naturally occurring molecules having similar structure to common bases
- 5BU has structure similar to thymine
- 2aminopurine has structure similar to purine
science
Alkyl bases are induced in DNA by which chemical mutagen?
- The alkylating agents helps in crosslinking of DNA which cannot replicate
- Other mechanism is by replacing hydrogen atoms of DNA with alkyl groups which cannot be repaired by the cell
Alkyl bases are induced in DNA by which chemical mutagen?
scienceGrade-10
- The alkylating agents helps in crosslinking of DNA which cannot replicate
- Other mechanism is by replacing hydrogen atoms of DNA with alkyl groups which cannot be repaired by the cell
science
Base analogs are which type of mutagens?
- Bases are classified into purine and pyrimidine
- Purine include adenine and guanine which are two ringed structures
- Pyrimidine include thymine and uracil which are single ringed structures
Base analogs are which type of mutagens?
scienceGrade-10
- Bases are classified into purine and pyrimidine
- Purine include adenine and guanine which are two ringed structures
- Pyrimidine include thymine and uracil which are single ringed structures
science
Ionizing radiation causes ___________.
- Ionizing radiations have shorter wavelength but high energy
- Ionizing radiations cause single strand break or crosslinking
Ionizing radiation causes ___________.
scienceGrade-10
- Ionizing radiations have shorter wavelength but high energy
- Ionizing radiations cause single strand break or crosslinking
science
If the mutation occurs in the non-functional part of DNA, then these mutations may remain as _________.
- Silent mutation does not affect the individual since the change in the nucleic acid sequence doe not alter the amino acid produced.
If the mutation occurs in the non-functional part of DNA, then these mutations may remain as _________.
scienceGrade-10
- Silent mutation does not affect the individual since the change in the nucleic acid sequence doe not alter the amino acid produced.
science
Mutations are mainly responsible for:
- Not all mutations are harmful
- Some mutations are silent, having no effect
- Development of lactose tolerance is an example for beneficial mutation
Mutations are mainly responsible for:
scienceGrade-10
- Not all mutations are harmful
- Some mutations are silent, having no effect
- Development of lactose tolerance is an example for beneficial mutation
science
_______ is the most mutagenic among UV rays.
- UV B and UV C have mutagenic effects
- The UV C radiations are filtered by the atmosphere
- Transition mutation is caused by UV C
_______ is the most mutagenic among UV rays.
scienceGrade-10
- UV B and UV C have mutagenic effects
- The UV C radiations are filtered by the atmosphere
- Transition mutation is caused by UV C
science
__________is the degree by which differences are seen in parents and their off-springs.
- No two individual is alike due to variation
- Variation is caused due to combination of paternal and maternal genes
- Environmental factors also can influence variation in some cases
__________is the degree by which differences are seen in parents and their off-springs.
scienceGrade-10
- No two individual is alike due to variation
- Variation is caused due to combination of paternal and maternal genes
- Environmental factors also can influence variation in some cases
science
Physical mutagens include:
- Mutation cause change in DNA sequence
- Not all mutations are harmful
- Some mutations are beneficial to survive, while some mutations may not produce any effect
Physical mutagens include:
scienceGrade-10
- Mutation cause change in DNA sequence
- Not all mutations are harmful
- Some mutations are beneficial to survive, while some mutations may not produce any effect
science
Mutation occurs at the time of:
- Mutation can be due to genetic or environmental factors
- The cause of mutation is called mutagen
- The individual affected is called mutant
- Not all mutations are harmful
Mutation occurs at the time of:
scienceGrade-10
- Mutation can be due to genetic or environmental factors
- The cause of mutation is called mutagen
- The individual affected is called mutant
- Not all mutations are harmful
science
When a gene pair hides the effect of another gene, the phenomenon is called ____________.
- Genes are specific DNA sequence coding for a particular trait
- The phenotype of an individual is determined by the genotype
- The genotype is represented by the two alleles
When a gene pair hides the effect of another gene, the phenomenon is called ____________.
scienceGrade-10
- Genes are specific DNA sequence coding for a particular trait
- The phenotype of an individual is determined by the genotype
- The genotype is represented by the two alleles
science
Which of the following traits were not used by Mendel?
- Mendel used true breeding plants
- The parent generation were homozygous with contrasting characters
- The contrasting characters of the parents were dominant and recessive
Which of the following traits were not used by Mendel?
scienceGrade-10
- Mendel used true breeding plants
- The parent generation were homozygous with contrasting characters
- The contrasting characters of the parents were dominant and recessive
