Related Questions

Which of the following statement(s) is/are CORRECT for antigen activated effector T cells?
P. CD4+ cells make contact with macrophages and stimulate their microbicidal activity.
Q. CD4+ cells make contact with B cells and stimulate them to differentiate into plasma cells.
R. CD8+ cells make contact with B cells and stimulate them to differentiate into plasma cells.
S. CD8+ cells make contact with virus infected cells and kill them.
Which of the following constitutes patentable subject matter?
1. A toxin-where such toxin is found on the skin of a previously unknown tree frog of the Amazon basin, which, when administered to patients with a certain cell cancer, causes a substantial reduction in the number of cancerous cells.
2. An idea-where such idea is that there is a mathematical relation among (i) the exposure time of a tumor to a specified alpha-radiation emitting source, (ii) the size of the tumor in cubic centimeters, and (iii) the success rate of the procedure as determined by survival rate at five years
3. Kidney cells-where such cells are found in a certain variety of wild pigs
4. A new laparoscopic surgical technique-where such technique bears improved results in patient cure
Select the correct answer:
Which of the following statements about immune response are correct?
P. T cells are activated by antigen-presenting cells.
Q. Foreign peptides are not presented to helper T cells by class II MHC proteins.
R. Dendritic cells are referred to as professional antigenpresenting cells.
The Bt toxin does not kill the Bacillus because the Bt toxin protein exist as inactive ________
Which of the following statements are correct regarding common differences between plant and animal cells?
1. Plant cells have cellulose cell wall, while animal cells lack it.
2. Plant cells lack plasma membrane, while animal cells have it.
3. Mature plant cell have a large vacuole, while animal cells have numerous small vacuoles.
Which type of toxin is tetanus toxin?
Which is the right order of the steps involved in differentiation of T cells? i) Activated T cell generation into blast cell  ii) Proliferation of blast cell  iii) Differentiation of daughter cells  iv) Differentiation into subsets of T cells
Which of the following statements about the commonly used automobile battery are true?
1. It is usually a lead-acid battery.
2. It has six cells with a potential of 2V each.
3. Its cells work as galvanic cells while discharging power.
4. It cells work as electrolytic cells while recharging.
Select the correct answer:
Consider the following statements and choose the correct answer:
1. All living things are composed of cells and their products
2. All cells arise from pre-existing cells
3. All cells are basically alike in chemical composition and metabolic activities
4. The function of an organism as a whole is the outcome of the activities and interactions of the constituent cells
Eukaryotic RNA polymerase II does not directly bind to the promoter, but relies on a dozen or more transcription factors to recognize and bind to the promoter in a specific order before its own binding around the promoter.