List of top Biology Questions

Select the mismatch :
Which of the following are found in extreme saline conditions ?
Which of the following components provides sticky character to the bacterial cell ?

Viroids differ from viruses in having:

Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen ?
Which among these is the correct combination of aquatic mammals ?
In case of poriferans, the spongocoel is lined with flagellated cells called:
An important characteristic that Hemichordates share with Chordates is :
In Bryophyta, a specialized organ of the sporophyte for attachment to the gametophyte is called :
In blue green algae, photo synthesis takes place in :
Replacement of which one of the following nucleotides in the Hbb gene causes sickle cell anaemia ?
Maximum absorption of water occurs in :
Which one of the following is a correct statement?
Which part of the nephron is impermeable to water?
What is Epiblema?
The signals for parturition originate from :
Root hairs develop from the region of :
Pick the correct group consisting of all genera exhibiting homospory.
Identify the accurate explanation of mesosome. It is
Yeasts are unicellular fungi that are used in bakery and brewery industries. Potato spindle tuber disease is caused by viroids.
XX-XY type of sex determination mechanism is an example of female heterogamety and is found in Drosophila. Male heterogamety is seen in moths where males produce two different types of gamete.
Restriction enzymes cut the strand of DNA to produce sticky ends. Stickiness of the ends facilitates the action of the enzyme DNA polymerase.
Photorespiration is a wasteful process where there is no synthesis of ATP energy. RuBisCO is present in mesophyll cells of C plants hence they show more productivity.
Flavr-Savr tomato was the first transgenic commercial crop that entered the market. Roundup variety of soybean was prepared through breeding.
Cephalisation is advantageous to an animal. Cephalisation improves the appearance of an animal.