the Molecular Basis of Inheritance
Q1: Why DNA replication is semi-conservative?
Answer:
Because after the process of replication, the newly formed DNA will have one parental strand and one newly synthesized strand. As one parental strand is conserved, it is called semi-conservative replication.
Q2: In the process of transcription why both the strands are not copied into mRNA?
Answer:
Because if both strand act as a template then there is a possibility that two RNA molecules will be produced with different sequences. It results in the formation of 2 different proteins.
Q3: Why capping and tailing is required during post-transcriptional modification in eukaryotes?
Answer:
Capping and tailing are required because it checks the degradation of the mRNA by hydrolytic enzymes in the cytoplasm.
Molecular Basis of Inheritance Notes Class 12
CBSE Class 12 Molecular Basis of Inheritance: Inheritance is transmitted by certain molecules that Mendel termed as ‘factors’, but their nature was discovered later with the development of various scientific techniques. The molecules which govern the inheritance are called genes and it is of two types; Deoxyribonucleic acid (DNA) and Ribonucleic acid (RNA). In all organisms except viruses, DNA acts as the genetic material whereas RNA acts as the messenger molecule, however in some viruses RNA functions as the genetic material. It is because DNA is a more stable molecule as compared to RNA and hence, it evolved as the genetic material of almost all the organisms.
Contact Us