Question
It is established that RNA is the first genetic material. Explain giving three reasons.
✓
Answer
Processes like metabolism, translation, splicing evolved around RNA, RNA is reactive and catalyses reaction. In some virus it is the hereditary material. It is so unstable and hence would have mutated to lead to evolution.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
- Name the organism in which the vector shown is inserted to get the copies of the desired gene.
- Mention the area labelled in the vector responsible for controlling the copy number of the inserted gene.
- Name and explain the role of a selectable marker in the vector shown.
A homozygous tall pea plant with green seeds is crossed with a dwarf pea plant with yellow seeds.
- What would be the phenotype and genotype of F, generation?
- Work out the phenotypic ratio of F, generation with the help of a punnett square.
Microbes have various contributions to the human welfare. For example, lactic acid bacteria help in checking disease causing microbes in our stomach. With reference to this fact, state the contribution of different microbes in the process of digestion in ruminants.
A group of youth were having a 'rave party' in an isolated area and was raided by police. Packets of ‘smack’ and syringes with needles were found littered around.
- Why is taking ‘smack’ considered an abuse?
- Write the chemical name of ‘smack’ and the name of its source plant.
- Syringes and needles used by the youth for taking the drug could prove to be very fatal. Why?
Explain with suitable examples the homology and analogy found in the plant or its parts.
Name the source of streptokinase. How does this bioactive molecule function in our body?
Observe the diagram for genetic mapping of human DNA and answer the following questions:
i. Explain DNA polymorphism as the basis of genetic mapping of the human genome.
ii. State the role of VNTR in DNA fingerprinting.
i. Explain DNA polymorphism as the basis of genetic mapping of the human genome.
ii. State the role of VNTR in DNA fingerprinting.
Branching descent and natural selection are the two key concepts of Darwinian Theory of Evolution. Explain each concept with the help of a suitable example.
What are bacteriophage vectors? Name the two phage vectors that are commonly used.
Following the collision of two trains, a large number of passengers are killed. A majority of them are beyond recognition. Authorities want to hand over the dead to their relatives. Name a modem scientific method and write the procedure that would help in the identification of kinship.