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TLS Online TPP Program

#Question id: 7134

What important lesson for the mechanisms of development can we derive from the ability to clone frogs by nuclear transfer?

#Unit 5. Developmental Biology
  1. that the selective gene expression seen in differentiated cells does not result from an irreversible loss of genes, or their potential for expression
  2. that a piece of a frog can be "planted" to obtain a new, cloned individual, just like in plants
  3. that the pattern of gene expression in a differentiated cell can only be reversed if the nucleus is removed from the cell
  4. that the mechanisms of development are irreversible in all organisms except frogs
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TLS Online TPP Program

#Question id: 33501

#Unit 2. Cellular Organization

A. The kinetics of DNA reassociation after a genome has been denatured distinguish sequences by their frequency of repetition in the genome.
B. Polypeptides are generally encoded by sequences in nonrepetitive DNA.
C. Larger genomes within a taxonomic group do not contain more genes but have large amounts of repetitive DNA.
D. A large part of moderately repetitive DNA may be made up of transposons.

Find the correct combination of true and false statements
TLS Online TPP Program

#Question id: 24649

#Unit 10. Ecological Principles

Which of the following is the characteristics of a realized niche?
a. Resource utilisation more
b. Determine by abiotic factors
c. limiting the areas inhabited by their prey or  hosts
d. Limited their niche by the temperature
TLS Online TPP Program

#Question id: 10501

#Unit 6. System Physiology – Plant

Which defenses require specific detection systems and signal transduction pathways that can sense the presence of an herbivore or pathogen and alter gene expression and metabolism accordingly
TLS Online TPP Program

#Question id: 10523

#Unit 6. System Physiology – Plant

Conifer resin ducts, which are found in the cortex and phloem, contain a mixture of diverse terpenoids, which are released immediately upon damage by herbivores such as;

a) monocyclic terpenes like- limonene and terpinolene

b) bicyclic monoterpenes- α-pinene and β-pinene

c) tricyclic sesquiterpenes- longifolene, caryophyllene, and δ-cadinene

d) tetracyclic terpenes- longifolene, tetra-terpinolene terpenoids are incorrect?
TLS Online TPP Program

#Question id: 1697

#Unit 4. Cell Communication and Cell Signaling

Cross-presentation of exogenous antigen to αβ T-cells does NOT require the involvement of: