List of top Biological Science Questions asked in IIT JAM BL

Which one of the following combinations showing the chromosome numbers for human cells is CORRECT?

The function \( y = 1 \) is an equation of a:

Bottle X contains 1 L of water, while bottle Y, which has the same capacity as X, is empty. Water is poured from bottle X to Y. The plot of the quantity of water in Y as a function of the quantity of water in X is:

The derivative of \( 2^x \) with respect to \( x \) is:

An example of transcytosis is:

On infection by a specific virus, a host generates cytotoxic T cells that kill:

In mammals, which one of the following vitamins is required in amino group transfer reaction?

'Philadelphia chromosome' is NOT linked to

Match the endocrine gland in Group A with the hormone secreted by them in Group B:
% Table for Groups\[\begin{array}{|c|c|} \hline Group A & Group B \\ \hline \text{(P) Anterior Pituitary} & \text{(i) Melatonin} \\ \hline \text{(Q) Thyroid} & \text{(ii) Glucocorticoids} \\ \hline \text{(R) Adrenal} & \text{(iii) Prolactin} \\ \hline \text{(S) Pineal} & \text{(iv) Calcitonin} \\ \hline \end{array}\]

A plant producing white flower with white seed coat (dominant) was crossed with a plant producing violet flower with gray seed coat (recessive). Upon selfing of 144 F2 progeny plants, the number of plants continuing to produce violet flower with gray seed coat will be:

Decreasing the concentration of sodium ions from double stranded DNA solution results in decrease in Tm. This happens because of increased

During pre-mRNA splicing reaction, a lariat RNA is formed when the intron cleaved at the 5' splice site gets linked by a

Which one of the following microscopes has working principle most similar to the way a blind person reads?

In vitro, group I introns have the ability to

Lysosomal targeting of proteins involves recognition of

Which one of the following, involving transfer of a phosphate group, is an example of substrate-level phosphorylation?

In polypeptide chains, the proline residue is unique in

Many plasma glycoproteins are protected from uptake and degradation by the hepatocytes in liver due to the presence of a terminal saccharide moiety known as

One of Koch's postulates states that the suspected causative organism should

Archaebacteria differ from bacteria in