Practice Questions

TLS Online TPP Program

#Question id: 11380

Which of the following is/are NOT valid explanation(s) for the observed pattern of species richness?

#SCPH06 I Botany

Older communities are more species rich.
Large areas support more species.
Absence of Natural enemies, area with more species richness
Greater productivity permits existence of more species

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TLS Online TPP Program

#Question id: 2634

#SCPH28 | Zoology

Tryptophan, the end-product of the enzymes encoded by the trp operon, therefore acts as a co-repressor and inhibits its own synthesis through:

TLS Online TPP Program

#Question id: 4812

#SCPH12 I Genetics

Two character X and Y ,both follow law of dominance due to 3:1 F2 phenotypic ratio monohybrid cross separately If carry out dihybrid selfing cross for heterozygous genotype for both character does not follow law of independence assortment in normal environmental condition due to?

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#Question id: 14151

#SCPH05 I Biotechnology

Which of the following statement is true?

A) PAM matrices are derived from an evolutionary model whereas the BLOSUM matrices consist of entirely direct observations.

B) Because of BLOSUM matrices have less evolutionary meaning that is why the PAM matrices are used most often for reconstructing phylogenetic trees.

C) BLOSUM matrices are entirely derived from local sequence alignments of conserved sequence blocks, whereas the PAM matrix is based on the global alignment of full-length sequences.

D) BLOSUM matrices are more advantageous in searching databases and finding conserved domains in proteins.

TLS Online TPP Program

#Question id: 4904

#SCPH12 I Genetics

Which one of the following statements is INCORRECT regards cytoplasmic inheritance?