Practice questions on how genetic information is stored, transmitted, and expressed at the molecular level. Covers DNA, RNA, and protein synthesis for exam prep.
A frameshift mutation results from the insertion or deletion of nucleotides, altering the reading frame of the genetic code.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance Human Genome Project and DNA Fingerprinting
Restriction endonucleases recognize and cut DNA at specific sequences, playing a crucial role in genetic engineering.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance Human Genome Project and DNA Fingerprinting
Polycistronic mRNA contains multiple genes, typically found in prokaryotes, which are translated into different proteins.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance Human Genome Project and DNA Fingerprinting
tRNA acts as an adapter molecule by linking codons in mRNA to the corresponding amino acids during translation.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance Human Genome Project and DNA Fingerprinting
In translation initiation, the mRNA first binds to the small ribosomal subunit before tRNA attachment.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance Human Genome Project and DNA Fingerprinting
Ribosomes are not membrane-bound organelles; they are freely floating in the cytoplasm or attached to the rough ER.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance Human Genome Project and DNA Fingerprinting
Guanosyl transferase adds a methylated cap to the 5' end of eukaryotic mRNA to enhance stability and translation.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance Human Genome Project and DNA Fingerprinting
The Human Genome Project aimed to identify all human genes and determine the complete DNA sequence of the human genome.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance Human Genome Project and DNA Fingerprinting
A silent mutation changes a nucleotide sequence but does not alter the amino acid due to the degeneracy of the genetic code.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance Human Genome Project and DNA Fingerprinting
AUG is the start codon, coding for methionine, and serves as the initiation signal for translation.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance Human Genome Project and DNA Fingerprinting
A release factor binds to the stop codon, leading to the termination of translation and the release of the newly synthesized protein.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance Human Genome Project and DNA Fingerprinting
DNA serves as a template for the synthesis of RNA during transcription.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance Human Genome Project and DNA Fingerprinting
