Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 55245
TLS Online TPP Program

#Question id: 20401

There were four rules of parity given by Erwin Chargaff 
1) Base A in one strand of the duplex is matched by (T) in the other strand, and base G in one strand of the duplex is matched by a complementary base (C) in the other strand
2) equal amounts of A and T, and equal amounts of C and G, in each single strand of the duplex. 
3) Purines in non-template strand applies more closely to Exons
4) GC content tends to be greater in exons than in introns
choose the correct option regarding rules 

#Unit 3. Fundamental Processes
  1. First is rule of GC Rule, second is Rule of Cluster rule, third is Equal amount, fourth is complementarity
  2. First is rule of complementarity, second is Rule of Equal amount, third is GC Rule, fourth is Cluster rule
  3. First is rule of Equal amount, second is Rule of complementarity, third is Cluster rule, fourth is GC Rule
  4. First is rule of complementarity, second is Rule of Equal amount, third is Cluster rule, fourth is GC Rule
More Questions
TLS Online TPP Program

#Question id: 721

#Unit 1. Molecules and their Interaction Relevant to Biology

Addition of urea leads to a two-state transition between α-helix and random coil conformation. It has been observed that [θ]222 of the polypeptide is -11000 deg cm2 dmol-1 in the presence of 6M urea. Initially it was observed that tile values of mean residue ellipticity at 220 nm ([θ]220) are -36000, and +4000 deg cm2 dmol-1 for α-helix, and random coil conformations of this polypeptide. The percentage of the polypeptide in α-helix conformation is:
TLS Online TPP Program

#Question id: 720

#Unit 1. Molecules and their Interaction Relevant to Biology

How would a homopolymer of alanine be more likely to form an alpha helix in water or in a hydrophobic medium?
TLS Online TPP Program

#Question id: 719

#Unit 1. Molecules and their Interaction Relevant to Biology

Suppose that a 40-residue segment of a protein folds into a two-stranded antiparallel β structure with a 4-residue hairpin turn. What is the longest dimension of this motif?
TLS Online TPP Program

#Question id: 718

#Unit 1. Molecules and their Interaction Relevant to Biology

Poly- L -leucine in an organic solvent such as dioxane is a helical, whereas poly- L isoleucine is not. Why do these amino acids with the same number and kinds of atoms have different helix-forming tendencies?
TLS Online TPP Program

#Question id: 717

#Unit 1. Molecules and their Interaction Relevant to Biology

What is Φ & Ψ angles for collagen triple helix?
TLS Online TPP Program

#Question id: 716

#Unit 1. Molecules and their Interaction Relevant to Biology

In beta turns which amino acid is not allowed at i and i+3 position?