List of practice Questions

Arrange the following steps in the process of somatic hybridization in correct sequence:
A. Plating of fused protoplasts
B. Selection of hybrid cells
C. Protoplast isolation and its treatment with fusion chemical.
D. Transfer of callus to differentiation medium
E. Selection of somatic hybrid plants
Choose the correct answer from the options given below :

Haploids can be artificially produced by -
A. Colchicine doubling
B. X-ray treatment
C. Pollen culture
D. Distant hybridization
E. Infrared radiation
Choose the correct answer from the options given below :

Autonomously replicating circular extrachromosomal DNA is called -

Nitrogen fixing cyanobacteria Anabaena is found in the root pockets of -

The cutting of DNA at specific locations became possible with the discovery of -

Arrange the basic steps to develop G. M. O. (Genetically modified organisms) in sequence:
A. Transfer of DNA with desired genes to its progeny
B. Identification of DNA with desired genes
C. Introduction of the DNA into the host.
D. Maintenance of introduced DNA in the host.
Choose the correct answer from the options given below :

A microbial biocontrol agent which control butterfly caterpillars in plants is -

What is the function of leghemoglobin present in root nodulus of leguminous plants?

Choose the correct statements regarding homozygous diploid plants -
A. They are produced by doubling the chromosome number of haploids.
B. Doubling of chromosome enables the recessive traits to express too.
C. Chromosome doubling is done by Ozone treatment.
D. Chromosome doubling is done by colchicine treatment.
Choose the correct answer from the options given below:

Transgenic plants developed by introducing Bt gene in crops like brinjal, maize, cotton etc. provide resistance to:

Which of the following converts nitrites to nitrates?

San Noeum first successfully cultured gynogenic haploid plants from unfertilized ovaries of -

Nitrogen fixation occurs with the help of symbiotic bacteria in -
A. Pea
B. Lettuce
C. Beans
D. Tomato
E. Black gram
Choose the correct answer from the options given below :

In biological nitrogen fixation conversion of dinitrogen molecule into ammonia is carried out by enzyme.

Choose the correct statements regarding cytology of haploids -
A. A haploid in Arabidopsis will have 5 chromosomes.
B. Haploids are found as bivalents at metaphase-I of meiosis.
C. Haploids are found as univalent at metaphase-I of meiosis.
D. The haploids in maize will have 10 chromosomes.
E. The haploids in maize will have 20 chromosomes.
Choose the correct answer from the options given below :

Arrange the following steps for plant tissue culture (P.T.C.) in correct sequence:
A. Selection of desired material and suitable nutrient media for P. T. C.
B. Inoculation of explants
C. Surface sterilization of explant
D. Transfer of growing cultures
E. Transfer of plantlets to soil in pots
Choose the correct answer from the options given below :

In nitrogen cycle, Ammonification is the process of generating ammonia from-

Conversion of ammonia to nitrates is called -

Choose the correct statements regarding plant tissue culture -
A. Organogenesis is inducing the formation of various vegetative organs from cells or tissues.
B. Formation of mass of undifferentiation cells from callus redifferentiation.
C. Cytoplasmic hybrids are prepared by taking the nucleus from one parent and cytoplasm from both the parents.
D. Relative concentration of growth hormones play important role in organogenesis.
Choose the correct answer from the options given below :

Full form of CRISPR, a term used in genome editing is -

The process of combining cytoplasmic genomes of one parent with nuclear genome of other parent is called -

__________ Molecules of ATP are required to fix one molecule of nitrogen (N2) to 2NH3.

Symbiotic nitrogen fixing bacteria are found in -
A. Azolla
B. Gnetum
C. Anthoceros
D. Cycas
E. Riccia
Choose the correct answer from the options given below :

Important enzymes involved in nitrogen fixation are -

'Pomato' a hybrid of potato and tomato was produced through-