HSC Science कक्षा १२ - Tamil Nadu Board of Secondary Education Question Bank Solutions for Botany

The point mutation sequence for transition, transition, transversion, and transversion in DNA are

DNA dependent RNA polymerase catalyzes transcription on one strand of the DNA which is called the

Initiation codon is

DNA element with ability to change position is called

During DNA replication Okazaki fragments are used to elongate

Write the steps involved in the molecular mechanism of DNA recombination with a diagram.

What is DNA repair?

EcoRI cleaves DNA at

An analysis of chromosomal DNA using the southern hybridisation technique does not use

An antibiotic gene in a vector usually helps in the selection of

Is their any possibilities to transfer a suitable desirable gene to the host plant without a vector? Justify your answer.

Compare the various types of Blotting techniques.

The prevention of large scale loss of biological interity

Give four examples of plants cultivated in commercial agroforestry.

IUCN red list categories has developed criteria for threatened species. The criteria ‘C’ refers to

Assertion: Genetic variation provides the raw material for selection

Reason: Genetic variations are differences in genotypes of individuals.

Pick out the odd pair.

Match Column I with Column II

The quickest method of plant breeding is

Desired improved variety of economically useful crops are raised by