List of top Botany Questions

Among the following identify Zwitterionic form of amino acid

Red eyed plain thorax Drosophila flies were crossed with pink eyed, striped thorax flies. \(F_{1}\) generation flies were test crossed with recessive flies. \(F_{2}\) generation result is as follows. \[ \text{Red eyed plain thorax}=80 \] \[ \text{Red eyed striped thorax}=16 \] \[ \text{Pink eyed plain thorax}=12 \] \[ \text{Pink eyed striped thorax}=92 \] Find out the percentage of recombinants.

Which of the following two parts observed in the embryo of grass plant are not observed in the embryo of pea plant?

Zygomorphic flowers showing imbricate aestivation

Among the situations given below, choose the one that prevents both autogamy and geitonogamy.

A stretch of euchromatin has 200 nucleosomes. How many bp will be there in the stretch and what would be the length of the euchromatin?

Type of ovule present in non-endospermic seeded Pisum plant.

Which of the following is wrongly matched pair?

A mixture contains DNA fragments a, b, c and d with molecular weights of \(a+b=c\), \(a>b\) and \(d>c\). The positions of these fragments from cathode to anode sides of the gel plate are

Consider the following statements Assertion (A): The RNAi can be introduced in an organism by insertion of gene encoding ssRNA only. Reason (R): RNAi takes place in all eukaryotic organisms as a method of cellular defence.

Chrysanthemum differ from Jasmine, in the given aspects during vegetative propagation process I. Lateral branches arise from basal and underground parts of main stem II. Branches bent and grow downwards III. Branches grow obliquely upwards IV. Lateral branches arise from the base of the main axis and are aerial

In which type of placentation, unilocular ovary is present? I. Marginal II. Axile III. Parietal IV. Free central V. Basal

Cry II Ab and Cry I Ab produce toxins respectively that control

Consider the following statements Assertion (A): Phycomycetes are commonly called as sac fungi. Reason (R): In Phycomycetes zoospores or aplanospores are produced endogenously in sporangium. The correct answer is

The term systematics refers to

Roundup Ready soybean has which one of the following features?

Propionibacterium shermanii is used for the making of:

Transfer of new genes into wild species through natural out-crossing leads to:

Parbhani Kranti, a variety of Bhindi, has resistance to:

Match the column-I with column-II: A) Lipases, B) Pectinases, C) Streptokinase, D) Statin (I) Juice clarification, (II) Remove oil stains, (III) Lowers blood-cholesterol, (IV) Remove clots from blood vessels

Choose the correct statements among the following: A) Selection of recombinant DNA by the inactivation of antibiotics is a cumbersome process. B) Formation of chimeric DNA is possible when cutting the DNA by a restriction enzyme and by adding ligase. C) Any protein-encoding gene expressed in a heterologous host is called a recombinant protein. D) The probability that GAATTC occurs in DNA is once in 4196 nucleotides.

Choose the incorrect statements: A) Alien DNA can be linked to origin of replication of DNA. B) DNA ligase can act as a restriction enzyme. C) Each restriction endonuclease recognizes a specific palindromic nucleotide sequence in DNA. D) Exonucleases will cut the specific position of DNA.

Assertion (A): Though the parents contain two alleles during gamete formation, the alleles of a pair segregate from each other. Reason (R): Segregation is a universal phenomenon in all organisms showing sexual method of reproduction.

Choose the correct statements among the following: A) Some genes are very tightly linked on the same chromosome, which shows higher recombination. B) Sutton proposed the chromosome theory of inheritance. C) Behaviour of the chromosome was parallel to the behaviour of genes. D) Mendel's selection of one of the contrasting traits is seed shape as inflated and wrinkled.

Arrange the following events of lytic cycle of virus in a sequence: A) Phage DNA is assembled in the protein to form viral particles. B) Bacterial cell lysis, releasing completed infective phages. C) The phage DNA directs the cell's metabolism to produce viral components. D) Phage attaches to receptor site of bacterial cell.