IAT (IISER) 2023

Which one of the following anatomical features of wood can be used to estimate the age of a tree growing in a temperate climate?

Which one of the following is an example of genetic diversity?

Match the biomolecules given in Column I with their corresponding chemical nature given in Column II.








Column I



Column II





P.

Insulin

(i)

Secondary metabolite





Q.

Inulin

(ii)

Homopolymer





R.

Lectin

(iii)

Quate...

\(\text { The diagram represents an enzyme, its substrate and potential inhibitors }(P, Q, R, S, T) \text {. }\)

Which one of the following combinations is the best pair of competitive inhibitors for the enzyme?

A 1000 base-pair DNA fragment was cloned between Hind III and EcoRI sites of the plasmid vector (plAT) of size 3500 base-pair. The cloned fragment had a Not I site as shown in the figure. In order to confirm the presence of the insert, the ...

A mitotic drug inhibits microtubule formation. Which one of the following stages of karyokinesis will be the first to get affected by the drug?

Which one of the following best describes peptones?

For which one of the following diseases does the causative agent require the splicing of their hnRNA to generate mature mRNA?

\(\text { Match the terms in column I with their physiological roles given in Column II. }\)








Column I



Column II





P.

Sertoli cells

(i)

Secretion of chorionic gonadotropin





Q.

Follicle stimulating hormone

(ii)

Carri...

Which one of these statements is CORRECT about biological nitrogen fixation in plants?

When the ribosome encounters a stop codon in the mRNA, during translation, which one of the following binds to the stop codon?

In an island with 10,000 individuals, four have sickle cell anemia, a recessive autosomal disease. Assuming that the locus is in Hardy-Weinberg equilibrium, how many individuals in that island are expected to be heterozygous for the disease...

The following pedigree chart shows the inheritance of a genetic disorder. I-2 and III-2 are the only affected individuals.

Which one of the following is the correct pattern of inheritance of the disorder, and the genotype of the II- 3 indi...

Which one of the following statements regarding seed structure is INCORRECT?

\(\text { Match the entries in Column I with their functions described in Column II. }\)








Column I



Column II





P.

Squamous epithelium

(i)

The nucleus is at the basal side of the cell; also helps in movement of particles an...