Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 1953
TLS Online TPP Program

#Question id: 1978

In which of the following situations will helper T cells be activated?

#Unit 4. Cell Communication and Cell Signaling

  1. when an antigen is displayed by a dendritic cell

  2. when a cytotoxic T cell releases cytokines

  3. when natural killer (NK) cells come in contact with a tumor cell

  4. in the bone marrow during the self-tolerance test

More Questions
TLS Online TPP Program

#Question id: 17280

#Unit 13. Methods in Biology

During DNA isolation, phenol / chloroform extraction is performed to remove
TLS Online TPP Program

#Question id: 17281

#Unit 9. Diversity of Life Forms

Identify each of the following structures as haploid or diploid: 
A) sporophyte 
B) spore 
C) gametophyte 
D) zygote 
E) Sperm
TLS Online TPP Program

#Question id: 17282

#Unit 9. Diversity of Life Forms

Which of the following is a land plant that produces flagellated sperm and has a sporophyte-dominated life cycle? 
TLS Online TPP Program

#Question id: 17283

#Unit 9. Diversity of Life Forms

The structural integrity of bacteria is to peptidoglycan as the structural integrity of plant spores is to__

TLS Online TPP Program

#Question id: 17284

#Unit 9. Diversity of Life Forms

Which kind of plant tissue should lack phragmoplasts? 
TLS Online TPP Program

#Question id: 17285

#Unit 13. Methods in Biology

If the arithmetic mean of the data given below is 28, 
The median of the series is