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TLS Online TPP Program

#Question id: 12766

Which of the following statements about the evolution of life histories is correct? 

#Unit 10. Ecological Principles
  1. Stable environments with limited resources favour r-selected populations.
  2. K-selected populations  are most often found in  environments where density-independent factors are important regulators of population size.
  3. Most populations have both r- and K-selected characteristics that vary under different environmental conditions.
  4. The reproductive efforts of r-selected populations are directed at producing just a few offspring with good competitive abilities.
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TLS Online TPP Program

#Question id: 14079

#Unit 1. Molecules and their Interaction Relevant to Biology

Which DNA is favored in many solutions that are relatively devoid of water with the base pair per turn of
A. B DNA
B. A DNA
C. Z DNA
D. 10 bp per turn
E. 11 bp per turn
F. 12 bp per turn
Which of the following combination is correct?
TLS Online TPP Program

#Question id: 14080

#Unit 1. Molecules and their Interaction Relevant to Biology

 Hairpin and cruciform structures are formed when the DNA sequence have
TLS Online TPP Program

#Question id: 14081

#Unit 1. Molecules and their Interaction Relevant to Biology

pKa of cytosine normally has a value of 4.2 but in hoogsteen triple base pairing this value changes to 
TLS Online TPP Program

#Question id: 14082

#Unit 1. Molecules and their Interaction Relevant to Biology

Conditions where hoogesteen triple base pairing occurs are
A. Presence of alternate GC repeats
B. Presence of only pyrimidines in a strand
C. Presence of only Purines in a strand
D. Acidic pH
E. Basic pH
Choose the option containing correct statement in it
TLS Online TPP Program

#Question id: 14083

#Unit 1. Molecules and their Interaction Relevant to Biology

What components are required for stabilizing DNA double helix
TLS Online TPP Program

#Question id: 14084

#Unit 1. Molecules and their Interaction Relevant to Biology

In DNA helix the angle at which the two sugars protrude from the base pairs (i.e., the angle between the glycosidic bonds) are 
A. 120
B. 36 
C. 240
D. 20
Choose the correct option?