List of top Biology Questions

The energy yield as a result of total oxidation of one glucose molecule during cellular respiration is to convert
The end product of anaerobic respiration, in plants is
The differences between $mRNA$ and $tRNA$ are that (i) $mRNA$ has more elaborated $3$-dimensional structure due to extensive base-pairing (ii) $tRNA$ has more elaborated $3$-dimensional structure due to extensive base-pairing (iii) $tRNA$ is usually smaller than $mRNA$ (iv) $mRNA$ bears anticodon but $tRNA$ has codons,
The different steps in a nodule formation are given below. I. A mature nodule establishes a direct vascular connection with the host for exchange of nutrients. II. Root hair curls and the bacteria invade the root hair. III. Rhizobium bacteria contact a susceptile root hair, divide near it IV. The infection thread is produced carrying the bacteria and grows into the cortex of the root. V. The bacteria get modifi ed into rod-shaped bacteroids and cause inner cortical layer and pericycle to divide to form nodule. The correct sequence is
The diaphragm, cervical cap and vaults are
The diagram given below represents a section of small intestinal mucosa. Identify $A, B$ and $C$
The development of Periplaneta americana is
The deficiency of this micro nutrient results in ??ittle leaf?
The coxal bone consists of
The correct match for kind of respiration is
The concept of Joint Forest Management $(JFM)$ involves
The component of nitrogenase and nitrate reductase is
The commonest living, which can respire in the absence of O is
The common bile duct in human is formed by the joining of
The characters which appear in the first filial generation are called
The characteristic(s) common to urea, uric acid and ammonia is/are (i) They are nitrogenous wastes (ii) They all need very large amount of water for excretion (iii) They are all equally toxic (iv) They are produced in the kidneys
The characteristic property of organization is present
The cell wall is composed of two thin overlapping shells which fit together like a soap case in
The cells called '$HIV$ factory' is
The cardiac impulse is initiated and conducted further upto ventricle. The correct sequence of conduction of impulse is
The Bt toxin is not toxic to human beings because
The breeding carried out between animals of different breeds is called
The ascending or descending arrangement of taxonomic categories is called as
The antibody which can cross placental barrier is
The anther wall consists of four wall layers where