Criticism of Mutation Theory
Trending Questions
Q. Which is false for microevolution?
- Occurs over short time scales and small changes
- It can be exemplified by speciation phenomena
- It can be exemplified wherein a bacterium growing in a lab undergo mutation that confers it with higher division rates than others
- Microevolution is simply a change in gene frequency within a population.
Q. In gene mutations, when a purine is substituted by another purine it is called:
- Transformation
- Translocation
- Transduction
- Transition
Q. Frame shift mutation occurs when
- Base is deleted or added
- Base is added
- Base is deleted
- Anticodons are not present
Q. Differentiate between chromosomal and gene mutation. How is frame-shift mutation different from point mutation?
Q. Point mutation involves?
- Deletion
- Insertion
- Change in single base pair
- Duplication
Q.
Frame shift mutations occur following
Frame shift mutations occur following
- tautomeric shifts
- base substitutions
- dimer formation
- insertion/deletion of single base
Q. Assertion :When the DNA sequences of two people are cut using the same restriction enzyme, the length and number of fragments obtained are different for both. Reason: DNA sequence is arranged tandemly in many copy numbers which varies from chromosome to chromosome in an individual, showing high degree of polymorphism.
- Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
- Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
- Assertion is correct but Reason is incorrect
- Both Assertion and Reason are incorrect
Q. Point mutation is
- Loss of gene
- Change in a base of gene
- Addition of a gene
- Deletion of a segment of gene
Q. Gene mutation occurs
- Due to linkage
- Due to breeding
- Due to change in nitrogenous base sequence
- Due to change in sequence of genes present in DNA
Q. Which type of mutation is being shown by new DNA sequence?
Original DNA sequence: CAGCT-CCG
New DNA sequence: CTAGCTACCC
I. Point mutation
II. Deletion
III. Frameshift
- II only
- I only
- I and III
- III only
- I and II
Q. Write short notes on gene mutation.
Q. Transfer of gene between populations that differ genetically from one another is called
- Gene mutation
- Gene flow
- Genetic drift
- Genetic recombination
Q. Which of the following mutations would be most likely to have a harmful effect on an organism?
- A single base insertion near the start of the coding sequence
- A base-pair substitution
- A single base deletion near the middle of an intron
- A single base deletion close to the end of the coding sequence
Q. A type of genetic mutation is
- Point
- Silent
- Insertion
- Frame-shift
- All of the above
Q. Choose the correct answer from the alternatives given :
A DNA sequence undergoes three subsequent point mutations which result in subsequent changes in transcription of mRNA as shown below:
Original mRNA : AUG CAU CUC ACG GAU UAG
Point mutation 1: AUG CAU CUU ACG GUA UAG
Point mutation 2 : AUG CAU GCU UAC - GGU AUA
Point mutation 3 : AUG CAU GCU UAA GGU AUA
Select the correct sequence of point mutations that occurred in the DNA.
A DNA sequence undergoes three subsequent point mutations which result in subsequent changes in transcription of mRNA as shown below:
Original mRNA : AUG CAU CUC ACG GAU UAG
Point mutation 1: AUG CAU CUU ACG GUA UAG
Point mutation 2 : AUG CAU GCU UAC - GGU AUA
Point mutation 3 : AUG CAU GCU UAA GGU AUA
Select the correct sequence of point mutations that occurred in the DNA.
- Missense mutation → Frameshift mutation → Nonsense mutation
- Silent mutation → Nonsense mutation → Frameshift mutation
- Silent mutation → 4 Frameshift mutation → Nonsense mutation
- Missense mutation → Frameshift mutation → Silent mutation
Q. Point mutation involves
- Insertion
- Change in single base pair
- Duplication
- Deletion
Q. Which one can reverse the harmful effect of previous mutation?
- Suppressor mutation
- Intergenic mutation
- Intragenic mutation
- Indirect suppression
Q. State whether true or false:
Mutation theory fails to explain the significant impact of mutation on evolution.
Mutation theory fails to explain the significant impact of mutation on evolution.
- True
- False
Q. State whether true or false:
Mutation theory fails to explain the significant impact of mutation on evolution.
Mutation theory fails to explain the significant impact of mutation on evolution.
- True
- False
Q. Recognize the diagram and explain the main process indicated in the diagram. Give example.
Q. A genomatic mutation is the mutation involving
- Change in the number of chromosomes
- All the above
- Change in gene
- Change in chromosomal structure
Q. Which of the following mutations produces no change in the sequence of protein?
- Point mutation
- Frameshift mutation
- Insertion
- Deletion
- Stop mutation
Q. State whether true or false:
Mutation theory fails to explain the significant impact of mutation on evolution.
Mutation theory fails to explain the significant impact of mutation on evolution.
- True
- False
Q. The interaction of two genes on different loci is called as
- Pleiotropy
- Recessive
- Dominance
- Epistasis
Q. Choose the correct answers from the alternatives given :
If the DNA codons are CAT CAT CAT, and a guanine base is added at the beginning, then which would result?
If the DNA codons are CAT CAT CAT, and a guanine base is added at the beginning, then which would result?
- ACATCATCAT
- GCATCATCAT
- Frameshift mutation
- Both (b) and (c)
Q. Define mutation. Illustrate the types of mutations that can arise by change in chromosome structure.
Q. Mutation in which a part or complete gene is removed is
- Deletion
- Translocation
- Inversion
- Duplication
Q. Mutations altering nucleotide sequence within a gene are
- Frame shift mutations
- Base pair substitution
- Both A and B
- None of the above
Q. The minimum requirement for mutation is a
- Change of triplet codon
- Change in single nucleotide
- Change in single strand of DNA
- Change in whole DNA
Q. How does a mutagen induce mutation? Explain with example.