Practice questions on experiments identifying genetic material, the role of RNA in early life, and the RNA world hypothesis. Helps students understand heredity and origins of life.
Enhancers are DNA sequences that increase transcription efficiency by binding to activator proteins.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance Search for Genetic Material and RNA World
Genetic material does not directly catalyze biochemical reactions; instead, proteins and ribozymes perform catalytic functions.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance Search for Genetic Material and RNA World
Frederick Griffith discovered the phenomenon of transformation while working with Streptococcus pneumoniae.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance Search for Genetic Material and RNA World
Carl Woese proposed the RNA World Hypothesis, which suggests that RNA was the first genetic material.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance Search for Genetic Material and RNA World
Crossing over occurs during meiosis and allows genetic recombination between homologous chromosomes.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance Search for Genetic Material and RNA World
Reverse transcription (RNA to DNA) is not a universal process; it occurs in retroviruses but not in all organisms.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance Search for Genetic Material and RNA World
Hershey and Chase demonstrated that DNA, not protein, is the genetic material using bacteriophages labeled with radioactive isotopes.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance Search for Genetic Material and RNA World
Beadle and Tatum proposed the one gene-one enzyme hypothesis through experiments with Neurospora crassa.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance Search for Genetic Material and RNA World
Enhancers are DNA sequences that increase transcription efficiency by binding activator proteins.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance Search for Genetic Material and RNA World
A silent mutation does not change the amino acid sequence due to the redundancy of the genetic code.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance Search for Genetic Material and RNA World
The Central Dogma describes the flow of genetic information from DNA (Replication) to RNA (Transcription) to Protein (Translation).
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance Search for Genetic Material and RNA World
mRNA (messenger RNA) carries genetic information from DNA to the ribosome for protein synthesis.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance Search for Genetic Material and RNA World
