List of top Biology Questions asked in KCET

The organisms which invade a bare area to initiate an ecological succession are known as
Which of the following features of plants is not helpful in adapting to desert life?
In RNA interface, the dsRNA molecule prevents ________
Biolistics method is suitable for gene transfer into ______.
Now-a-days, the early diagnosis of bacterial or viral infection in humans is possible using
From the given combinations of steps in PCR, identify the enzyme dependent step/s.
Ruminant animals can digest cellulose in their food, where as human beings are unable to do so. This is because
A chilly plant was severely infected with Chilly Mosaic Virus (CMV). Identify the technique that helps to raise virus free plants in the next generation from the above virus infected plant.
In sewage treatment, secondary treatment is considered highly significant, because
The hybridisation between naturally incompatible plants like Potato and Tomato can be achieved through
The transport of which neurotransmitter is interfered by cocaine?
In the life cycle of plasmodium, fertilisation takes place in
White rust resistant variety of Brassica is
For the given sequence of DNA, identify the complementary sequence of bases on its mRNA from the options given below:
DNA 3'-ATGCATGCATGC-5'
In a population of plants, some were extremely tall and the remaining were extremely dwarf. No plants of the population showed intermediate height. The type of operation of natural selection in the above case is
Certain tumours are called malignant, because
The length of DNA helix in a typical nucleosome is
In an Organism, mutation in a single gene exhibits multiple phenotypic expressions. Identify the underlying genetic mechanism in the above instance.
In eukaryotes, the entire base sequence of a gene do not appear in mature RNA because
When Escherichia coli cells are cultured in a medium where Lactose is absent, the 'i' gene of Lac Operon continues to produce repressor mRNA, because it is
Suppose DNA samples collected for DNA fingerprinting analysis are less than the required quantity. Which of the following techniques is helpful to make the samples sufficient for above analysis?
Match the months listed in Column-I with the organogenesis of foetus in Column-II.

Column-I

Column-II

(i) First month(a) Separation of eye lids
(ii) Second month(b)Hairs on head
(iii) Fifth month(c)Heart
(iv)Six month(d)Limbs & digits
Choose the correct options :
During an excavation of soil, Pollen. fossils were retrieved from deepest layer of soil. The pollen grains remained as fossils because
Which of the following characters was not studied by Mendel in his Pea plant experiments?
Which of the following contraceptives could be effective in avoiding pregnancy if used within 72 hours after casual unprotected intercourse?