TLS Online TPP Program

#Question id: 807


Which of the following forces can stabilize a normal DNA double-helix?

#Unit 1. Molecules and their Interaction Relevant to Biology
  1. Base-stacking is a non-covalent interaction that occurs between the relatively hydrophobic bases in the interior of the helix.

  2. Base-pairing is a non-covalent interaction that occurs between adjacent bases in the same strand of the DNA molecule.

  3. The hydrophilic sugar-phosphate groups are on the exterior of the helix where they can interact with each other.

  4. The deoxyribose rings form N-glycosidic bonds with the phosphate groups that link neighboring nucleotides.

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TLS Online TPP Program

#Question id: 10682

#Unit 10. Ecological Principles

if 30 individuals of species 2 take up the same amount of resources as 5 individual of species 1 then the per capita competitive effects on species 1 of species 2 is

TLS Online TPP Program

#Question id: 10683

#Unit 10. Ecological Principles

Which of the following interaction shown in figure

TLS Online TPP Program

#Question id: 10684

#Unit 10. Ecological Principles

Which one of the following statements is INCORRECT?

TLS Online TPP Program

#Question id: 10689

#Unit 10. Ecological Principles

Which of the following is correct statement?

A) Body size of parasitoid is always greater than host but parasite usually smaller than host

B) Predator immediately kill their prey however parasitoid never kill their host

C) Intrinsic rate of parasite is faster than host but intrinsic rate of predator is slower than prey

D) Body association time between parasite and host is more than time association between predator and prey

TLS Online TPP Program

#Question id: 10691

#Unit 10. Ecological Principles

Following some attributes of biological control agent of parasite

A) General adaptability to the environment.

B) High searching capacity for hosts.

C) K selected strategy

D) Low dispersal ability.

E) Minimal time lag effects in responding to changes in host numbers.

Following above attribute is not ideal for that biological agent?

TLS Online TPP Program

#Question id: 10694

#Unit 10. Ecological Principles

Which of the following is characteristic of parasitoid/ predators?

a) consumer usually larger than resource

b) Consumer requires one host for complete development.

c) Habitat independent

d) Consumer takes long time to kill host

e) Consumer never kills their host

f) Host is free living

Which of the following is feature of parasitoid?