List of top Biology Questions asked in Indian Institute Of Technology Joint Admission Test for MSc

Which one of the following pairs of antibodies contains ‘J-chain’ in their multimeric form?

Which of the given statement(s) about synthetic oligonucleotides is/are correct?

Hyperventilation (breathing rapidly and deeply) causes which of the following event(s) in the arterial blood?

Match the recombinant DNA products in Group I with its application in Group II

Group I	Group II
P) Tissue plasminogen activator	1) Emergency treatment of heart attack
Q) Erythropoietin	2) Treatment of anemia
R) Superoxide dismutase	3) Prevents tissue damage
S) Interferon	4) Stimulates cells to inhibit viral replication

Which of the following option(s) represent(s) the evolutionary relationship between the bird and bat wings as structures for flying?

Restriction enzymes that recognize the same nucleotide sequence but cleave at different positions are called

Which one of the following does NOT belong to the freshwater ecosystem?

The pedigree given below shows individuals affected (shaded circles/rectangles) by chronic hypertension. Assuming 100% penetrance, the inheritance of this trait is

Which one of the following statements about photoproteins in plants is INCORRECT?

A species of fish living in a lake are separated by drying up of the lake into two separate lakes. After several hundreds of years of separation, the two groups are unable to mate. These groups are now considered to be different _____.

Which one of the following enzymes is required to ensure the replication of a negative-sense or negative-strand RNA virus?

The inability in humans to taste capsaicin resides in a single gene difference between two alleles P and p. The allele P for tasting is dominant over the nontasting allele. In a population of 400 individuals in Hardy-Weinberg equilibrium, 64 are nontasters. How many individuals are heterozygous for the gene?

$K_m$ and $V_{max}$ of an enzyme preparation are 5 µM and 30 $µM min^{-1}$ respectively. Considering, $K_i$ value of competitive inhibitor is 60 µM, the velocity ($V_0$) of this enzyme-catalyzed reaction in the presence of 200 µM of substrate and 600 µM of competitive inhibitor is _______ $ µM min^{-1}$ (rounded off to two decimal places).

Which one of the following is transcribed by RNA polymerase III in eukaryotes?

The number of possible unique combination(s) of linear tetrapeptides that can be made from four different amino acids using each amino acid only once in the chain is/are _____.

Tetracycline binds to the

A growing shoot of a germinating seedling encounters an underground obstacle. Which one of the following hormones elicits ‘triple response’ to the underground obstacle?

Class II MHC molecules are NOT expressed by

Which one of the following is NOT a plant vascular tissue?

Which of the following is/are essential feature(s) of high-fidelity DNA polymerases used in polymerase chain reaction?

The rate of transcription in a bacterium is 50 nucleotides/min and the average molecular weight of an amino acid is 110 Da. Time taken for synthesis of the mRNA of a protein with molecular weight of 110 kDa is min. (rounded off to one decimal place) Assume no abortive transcriptions and no sequences upstream of the start codon.

Match the type of DNA repair mechanism in Group I with the enzyme(s) involved in Group II

Group I	Group II
P) Mismatch repair	1) DNA glycosylase
Q) Base excision repair	2) UvrA, UvrB, UvrC and UvrD
R) Nucleotide excision repair	3) RecA
S) Double strand break repair	4) MutL, MutS and MutH

Which one of the following statements is correct about solute transport across membranes?

In the ‘Southern blot’ technique, which of the following reagents is used to detect the presence of a desired DNA fragment?

Match the microorganisms in Group I with the human disease in Group II

Group I	Group II
P) Treponema pallidum	1) Sleeping sickness
Q) Trypanosoma cruzi	2) Whooping cough
R) Trypanosoma gambiense	3) Chagas disease
S) Bordetella pertussis	4) Syphilis