Practice Questions

TLS Online TPP Program

#Question id: 1369

The following statements are made with reference to characteristics of glycosaminoglycans and proteoglycans, which are major constituents of extracellular matrix. Which one of them is incorrect?

#Unit 4. Cell Communication and Cell Signaling

Glycosaminoglycans are long linear polymers of specific repeating disaccharides. Usually one sugar is either a uronic acid or d-galactose; the other sugar is N-acetylglucosamine or N-acetylgalactosamine.
Proteoglycan core proteins are synthesized in the endoplasmic reticulum, and the GAG chains are assembled on and covalently attached to these cores in the Golgi complex.
All GAG chains are elongated by the alternating addition of sugar monomers to form the disaccharide repeats characteristic of a particular GAG; the chains are often modified subsequently by the covalent linkage of small molecules such as sulfate.
The ratio of polysaccharide to protein in all proteoglycans is much lower than that in most other glycoproteins.

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TLS Online TPP Program

#Question id: 24517

#Unit 10. Ecological Principles

A specific kind of parasitism proposes that in which cuckoos or cowbirds repeatedly check their host’s nests and destroy all eggs if their owner is not present. If the parasite egg has been removed, they destroy the host’s nest and kill or injure the nestlings, this is an example of;

TLS Online TPP Program

#Question id: 24518

#Unit 10. Ecological Principles

Some nonnative parasites are introduced deliberately for the biological control of pests, which of the following are necessary attributes of a good agent of biological control?

a. low rate of increase relative to the host’s

b. Good dispersal ability

c. High searching capacity for hosts

d. Minimal time lag effects

e. Maximal time lag effect

f. General adaptability to the environment

TLS Online TPP Program

#Question id: 24519

#Unit 11. Evolution and Behavior

Natural selection idea is developed independently by

TLS Online TPP Program

#Question id: 24520

#Unit 11. Evolution and Behavior

which of the following characteristics that are involved to enhances the survival and reproduction of organisms that bear it ?

TLS Online TPP Program

#Question id: 24521

#Unit 11. Evolution and Behavior

Adaptation is involved in

b. Genetic drift

c. Origin of new species

TLS Online TPP Program

#Question id: 24522

#Unit 11. Evolution and Behavior

Plants will grow continuously and refer to genetically and phenotypically changes in the characteristics of interacting species resulting from the natural selection is applied on insect. This is an example of