CSIR NET 2023 | Life Science: Applied Biology | 06 June

The above figure shows the fluorescence emission spectra of three different proteins; Protein (X), Protein (Y) and Protein (Z) excited at 280 nm.

Which one of the following statements gives the correct interpretation?

Which one of the following drugs is obtained from the capsule of Papaver somniferum?

Following are statements to depict relationship among measures of central tendency in a skewed dataset.

A) In positively skewed datasets, mean > median > mode

B) In positively skewed datasets, mode > median > mean

C) In negatively skewed datasets, mean > median > mode

D) In negatively skewed datasets, mode > median > mean

Which of the above statements are TRUE?

Given below are the steps to assess the population size of grasshoppers in a given area:

A) ‘n’ individuals are collected randomly from the study area in a defined period of time.

B) The captured individuals are counted, marked and released at the site of collection. Next day, individuals are captured from the same site for same length of time. Number of marked (n_m) and unmarked (n_u) individuals are separated and counted.

C) This capture-release and recapture is continued till one gets 100% marked individuals.

D) The size of the population (N) is estimated as follows:

E) The size of population (N) is estimated as follow:

The most appropriate combination of steps for estimating population size using mark-recapture method is:

Following statements were given regarding factors influencing variation in expression levels of transgene in transgenic plants:

A) Difference in restriction enzyme sites within the T-DNA.

B) Difference in copy number of the transgene.

C) Variations in site of integration of the T-DNA within the plant genome.

D) Presence of multiple promoters within the T-DNA region.

Which one of the following options represents a combination of statements that would NOT lead to variations in transgene expression levels in transgenic plants generated using the same T-DNA/ binary vector?