List of top Biology Questions asked in AIIMS

Respiratory pathway is an amphibolic pathway. In respiration, there is breakdown of many substances (catabolism) and synthesis of many substances (anabolism) by respiratory intermediates.
Net primary productivity is gross primary productivity minus respiration. Secondary productivity is produced by heterotrophs.
Colpa aurea is a specialised pollinating agent of orchid Ophrys speculum. Male Colpa mistakes the Ophrys flower for female wasp to copulate with it.
Auerbach?? plexus controls the secretion of intestinal juice. Meissner?? plexus controls the peristalsis in alimentary canal.
Appetency is the formation of new structure or habit of the organism according to its need. Appetency is also called doctrine of desire.
Agrobacterium tumefaciens is popular in genetic engineering because this bacterium is associated with the roots of all cereal and pulse crops. A gene incorporated in the bacterial mesosome gets automatically transferred to the crop with which the bacterium is associated.
AIDS and hepatitis B are sexually transmitted diseases. There is no permanent cure for both of them.
A geneticist crossed two plants and got 50% tall and 50% dwarf progenies. This cross follows Mendelian law as one of the parent plant might be heterozygous.
Contraction of the cremaster muscle occurs because of
A patient of diabetes mellitus excretes glucose in urine even when he is kept on a carbohydrate free diet. It is because
According to the accepted concept of hormone action, if receptor molecules are removed from target organs, then the target organ will
Photorespiration is found in all plants. In C plants, first CO fixation product is formed in bundle sheath cells.
Albuminous seeds are found in
Petroplants produce large amount of latex. The latex contains long chain hydrocarbons.
Phenylpyruvic acid is excreted through urine in case of phenylketonuria. The affected individual lacks enzyme phenylalanine hydroxylase.
Which of the following belongs to Class Osteichthyes?
Which one of the following is a correct statement?
Which part of the nephron is impermeable to water?
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.