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TLS Online TPP Program

#Question id: 11145

Two fundamental concepts about the ion channels of a "resting" neuron are that the channels ________.

#Unit 7. System Physiology – Animal
  1. are always open, but the concentration gradients of ions frequently change
  2. are always closed, but ions move closer to the channels during excitation
  3. are open or closed depending on their type, and are specific as to which ion can traverse them
  4. open in response to stimuli, and then close simultaneously, in unison
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TLS Online TPP Program

#Question id: 5427

#Unit 8. Inheritance Biology

In a plant, height is control by three quantitative trait loci.  Each dominant additive allele is contributing 3 cm height in plant. Maximum expected plant height is 20 cm. What is minimum expected height? 
TLS Online TPP Program

#Question id: 19369

#Unit 12. Applied Biology

Genes are transferred from prokaryotes into plants this phase is considered as 
TLS Online TPP Program

#Question id: 24509

#Unit 10. Ecological Principles

Polyphagous parasites, usually complete their life cycle in two or more different host species and they also exhibit sexual reproduction . These types of host are,
TLS Online TPP Program

#Question id: 3652

#Unit 3. Fundamental Processes

Alkylating agents are electrophilic chemicals which readily add alkyl groups to various positions on nucleic acids. A common example is:
TLS Online TPP Program

#Question id: 5724

#Unit 8. Inheritance Biology

Species I is diploid (2n  = 8) with chromosomes

AABBCCDD; related species II is diploid (2n = 8) with chromosomes MMNNOOPP. Individuals with the following sets of chromosomes represent what types of chromosome mutations?

A-   AAABBCCDD        B-   AABBCCDDMNOP

C-   AAABBCCDDD