List of top Biology Questions asked in IIT JAM BT

Which of the following enzymes is absent in a person suffering from Alkaptonuria?

The bacterium that can tolerate high concentrations of salt and also ferment mannitol is

Match the following

Group I	Group II
Streptomycin	Inhibits beta-subunit of RNA polymerase
Cycloheximide	Inhibits peptidyl transferase activity of 505 subunit
Rifamycin	Inhibits peptidyl transferase activity of 605 subunit
Chloramphenicol	Inhibits binding of formyl methionine tRNA to ribosome

DNA gyrase can

In a honey bee population, the workers are infertile but protect the queen from intruders and help in reproduction. This is an example of

For an enzyme following Michaelis-Menten kinetics, when \([S]=K_M\) then, the velocity v is 
([S] is substrate concentration, \(K_M\) is Michaelis constant, \(V_{max}\) is maximal velocity)

The net equation for aerobic glycolysis is

In bacteria, the a fuctor that plays a major role in transcription during the stationary phase is

A rise in cytosolic calcium ion concentration just after fertilization in a sea urchin egg leads to

In a nephron,___ follows the ascending limb of the "loop of Henle".

Transpirational pull that extends down to the roots in plants can be interrupted by

Transfer of plasmids into animal cells can be achieved by

Archaeal cell membranes contain lipids that are

Which of the following are producers in an ecological system?

Which of the following acts as wound hormones in plants?

The enriched media used to facilitate the growth of fastidious microorganisms are

Match the bacterial structure to function

(i)	Cell wall	(a)	Virulence factor
(ii)	Glycocalyx	(b)	Selective permeability
		(c)	Attachment to surfaces
		(d)	Protection from osmotic lysis

Identify the correct pairs:
(i) Thermophile            (a) grows optimal at 37 °C
(ii) Mesophile                 (b) grows optimal at low temperature
(iii) Psychrophile             (c) grows optimal at high saline conditions
(iv) Halophile                  (d) grows optimal at 67 °C

A single copy of an allele in sickle-cell heterozygous individuals reduces the frequency and severity of malaria. The reason for this is

In an enzyme catalyzed first-order reaction, the substrate conversion follows an exponential pattern such that 80% of the substrate is converted in 10 minutes. The first-order rate constant (in min\(^{-1}\)) of the reaction, rounded off to THREE decimal places, is ............

Which of the following is(are) CORRECT?

Which of the following gas(es) function(s) as signaling molecule(s) in the human nervous system?

Protozoa are

Which of the following is(are) involved in the activation of cytotoxic T cells?

Which of the following is(are) TRUE about photosynthesis?