Organisms and Populations — BIOLOGY STD 12 Science — Question

Why does Plasmodium require a host?

Explain the contribution of Thermus aquaticus in the amplification of a gene of interest.

A vector is engineered with three features which facilitate its cloning within the host cell. List the three features and explain each one of them.

(a) Name the causative agent of typhoid in humans.
(b) Name the test administered to confirm the diseases.
(c) How does the pathogen gain entry into the human body? Write the diagnostic symptoms and mention the body organ that gets affected in severe cases.

Give three reasons as to why prokaryotes are not given any figures for their diversity.

(a) Tobacco plants are damaged severely when infected with Meloidogyne incognitia. Name and explain the strategy that is adopted to stop this infestation.
(b) Name the vector used for introducing the nematode specific gene in tobacoo plant.###How has RNA it technique helped to prevent the infestation of roots in tobacco plants by a nematode Meloidogyne incognitia?

Woman have more responsibility than man in the reproductive process. Why? Explain.

Certain molecular processes are given in column (A). Provide the terms given to these processes in column (B), after selecting them from the terms:
Recombination, gene regulation, prokaryotic transcription, eukaryotic transcription, translation, replication, gene transfer, DNA fingerprinting

S.No.	Column A	Column B
(i)	DNA → DNA
(ii)	DNA → hRNA
(iii)	mRNA → Protein
(iv)	Repressor Protein + Operator → No  transcription

Name a microbe used for statin production. How do statins lower blood cholesterol level?

Consult internet and find out how to make orally active protein pharmaceutical? What is the major problem to be encountered?