Cells Random Retrieval

NMO is a disease NMO is a disease that leads to damage to nerve cells in the spinal cord. A person with NMO produces anti-AQP4 antibody that attacks only these nerve cells. Explain why the anti-AQP4 antibody only damages these cells

On the above diagram, where would an antigen bind?

Which type of cell travels to the site of infection, and secretes a chemical which kills infected cells?

During phagocytosis, the pathogen is detected by molecule A on the cell surface membrane. What are the molecules labelled A called?

In the above experiment, two flasks contained identical masses of animal tissue, identical volume of a solution containing sodium ions, but an inhibitor of ATP production in flask F. Calculate the rate of the uptake of sodium ions in flask G, in the first 20 minutes.

Which type of membrane protein is not involved in facilitated diffusion?

Which of the following factors when increased, will decrease the rate of diffusion?

a) The Concentration Gradient

b) The Surface Area

c) The Diffusion Pathway

In this version of required practical 4, 1cm beetroot cores are soaked in different concentrations of ethanol - 0%, 10%, 20%and 30%. Which graph represents the expected results ?

Beetroot is a purple vegetable, the cells of which contain a pigment called Betalain. 4 tubes are set up with water and beetroot incubated at different temperatures: 20, 40, 60 and 80 ⁰C. What is the dependent variable of this experiment?

What effect does having more of molecule 'I' have on the membrane?

To calculate the 'Mitotic Index' you need to stain your root tip cells. Which of the following is NOT an appropriate stain to view Chromosomes with?

Between which times does synthesis take place?

What happens in G2 phase?

What happens in S phase?

Which type of electron microscope produced this image?

True or false : plasmids contain non essential genes

What is structure D called?

Name this organelle.

Name this organelle.

What is the best definition of a eukaryotic cell?