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Previous Year Questions

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TLS Online TPP Program

QUESTION ID:1

Following are statements related to spectroscopic investigation of proteins.

A. Tryptophan fluorescence in a protein is not sensitive to its environment.

B. Observation of a large number of N; - Ni+1 connectivity’s in the NOESY spectrum of a protein suggests the presence of helical conformation.

C. Only proteins with masses less than 5000 daltons can be identified by MALDI mass spectrometry.

D. Protein conformation can be investigated by ESI mass spectrometry.

Which one of the following options consists of both correct statements?

QUESTION ID:2

Following are statements related to statistical methods:

 A. An outlier can be defined as a value in a data set that lies more than three standard deviations from the mean.

 B. Measures of central tendency and dispersion are independent of the presence of outliers in a data set.

 C. Standard deviation is a measure of dispersion.

 D. Mean, median and mode are not measure of central tendency.

 Which one of the following options is a combination with both INCORRECT statements?

QUESTION ID:3

Given below are sampling techniques and their features.



Sampling technique
Features
A.Stratified sampling(i)Population is divided into groups/clusters and a sample of groups/clusters is chosen using a probability method
B.Systematic sampling(ii)Population is divided into groups/clusters and within each group/cluster, a probability sample is selected from it.
C.Opportunity sampling(iii)Only participants available and willing to participate are used.
D.Clustered sampling(iv)Samples are selected at regular intervals from the population

Which one of the following options correctly matches sampling techniques with their features?