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TLS Online TPP Program

#Question id: 131

The RS system of nomenclature describes

#Unit 1. Molecules and their Interaction Relevant to Biology

  1. amino acids not easily described by the DL system.

  2. the way the R groups are arranged.

  3. the chiral carbon centers of amino acids.

  4. the strength of the chemical groups in amino acids.

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TLS Online TPP Program

#Question id: 12581

#Unit 10. Ecological Principles

Which of the following causes an increase in the intensity of UV radiation reaching the Earth? 
TLS Online TPP Program

#Question id: 33366

#Unit 1. Molecules and their Interaction Relevant to Biology

An antibody binds to an antigen with a Kd of 5 X10-8 M. At what concentration of antigen will θ be 0.8
TLS Online TPP Program

#Question id: 4481

#Unit 3. Fundamental Processes

Choose correct statements about recognition mechanism of TBP ;

A. TBP causes the minor groove to be widened to an almost flat conformation

B. It also bends the DNA by an angle of ~120o

C. The interaction between TBP and DNA involves maximum number of hydrogen bonds between the protein and the edges of the base.

D. Much of the specificity is imposed by two pairs of phenylalanine side chains that intercalate between the base pairs at either end of the recognition sequence and drive the strong bend in the DNA.
TLS Online TPP Program

#Question id: 4171

#Unit 3. Fundamental Processes

Use the table below to determine which template strand DNA sequence (written in the 5ʹ → 3ʹm direction) specifies the tripeptide with the sequence gly-ala-leu.
TLS Online TPP Program

#Question id: 28284

#Unit 5. Developmental Biology

In the Fast block to polyspermy, after the binding of the first sperm, the membrane potential shifts from