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TLS Online TPP Program

#Question id: 179

The average molecular weight of the 20 standard amino acids is 138, but biochemists use 110 when estimating the number of amino acids in a protein of known molecular weight. Why?

#Unit 1. Molecules and their Interaction Relevant to Biology

The number 110 is based on the fact that the average molecular weight of a protein is 110,000 with an average of 1,000 amino acids.
The number 110 reflects the higher proportion of small amino acids in proteins, as well as the loss of water when the peptide bond forms.
The number 110 reflects the number of amino acids found in the typical small protein, and only small proteins have their molecular weight estimated this way.
The number 110 takes into account the relatively small size of nonstandard amino acids.

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TLS Online TPP Program

#Question id: 18663

#Unit 13. Methods in Biology

When a protein exists in mono-, di- and tri-phosphorylated forms. The difference of a couple of phosphate groups has no significant effect on the overall relative molecular mass of the protein, hence a single band on SDS gels, but the small charge difference introduced on each molecule can be detected by

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#Question id: 12336

#Unit 10. Ecological Principles

Which of the following statements about ecology is incorrect?

TLS Online TPP Program

#Question id: 3408

#Unit 11. Evolution and Behavior

New species originated via punctuated equilibrium having some characterstic feature

a. occur during cladogenesis from ancestral species

b. subpopulation of ancestral species transform in to new species

c. Morphological change is sudden and rapid

d. continuously change in their morphology

which above statement is correct

TLS Online TPP Program

#Question id: 12165

#Unit 8. Inheritance Biology

If the environmental variance increases and all other variance components remain same , then what will be the effect on heritability?

TLS Online TPP Program

#Question id: 14693

#Unit 13. Methods in Biology

Two sisters A and B appeared for an Audition. The probability of selection of A is 1/5 and that of B is 2/7. The probability that both of them are selected is