List of top Biology Questions

Read the following four statements (A - D). (A) In transcription, adenosine pairs with uracil. (B) Regulation of lac operon by repressor is referred to as positive regulation. (C) The human genome has approximately 50,000 genes. (D) Haemophilia is a sex-linked recessive disease. How many of the above statements are right?
Read the following four statements (A - D). (A) Colostrum is recommended for the new born because it is rich in antigens. (B) Chikungunya is caused by a Gram negative bacterium. (C) Tissue culture has proved usefiil in obtaining virus-free plants. (D) Beer is manufactured by distillation of fermented grape juice. How many of the above statements are wrong?
The coconut water and the edible part of coconut are equivalent to
For its activity, carboxypeptidase requires
Even in absence of pollinating agents seed-setting is assured in
Identify the human developmental stage shown below as well as the related right place of its occurrence in a normal pregnant woman, select the right option for the two, together. Dev elopmental - Site of occurrence stage
Green revolution in India occurred during
Plants with ovaries having only one or a few ovules are generally pollinated by
Closed vascular bundles lack
The most abundant prokaryotes helpful to humans in making curd from milk and in production of antibiotics are the ones categorised as
The maximum amount of electrolytes and water ($70 - 80$ percent) from the glomerular filtrate is reabsorbed in which part of the nephron?
Common cold differs from pneumonia in that Pneumonia
Placentation in Tomato and lemon is
Gymnosperms are also called soft wood spermatophytes because they lack
Which one of the following is not a gaseous biogeochemical cycle in ecosystem?
How many organisms in the list given below are autotrophs ? Lactobacillus, Nostoc, Chara, Nitrosomonas, Nitrobacter Streptomyces, Saccharomyces, Trypanosoma, Porphyra, Wolffia
Select the correct statement about biodiversity
The highest number of species in the world is represented by
Vexillary aestivation is characteristic of the family
Cymose inflorescence is present in
Which is not a functional unit of an ecosystem
Which one of the following pairs is wrongly matched ?
The gynoecium consists of many free pistils in flowers of
As compared to a dicot root, a monocot root has
How many plants in the list given below belongs to the Fabaceae family? Mustard, Gram, Tulip, Asparagus, Arhar, Sun hemp, Chilli, Colchicine, Onion, Moong, Pea, Tobacco, Lupin, Trifolium, Sesbania